diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index efc314b..aaa04d7 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,7 +1,7 @@
 # Contributing to docker-practice
 
 👋 Thank you for considering contributing to **docker-practice**!  
-This project is a community-driven, unofficial repository designed to help people prepare for the **Docker Certified Associate (DCA)** certification exam.
+This project is a community-driven, unofficial repository designed to help people training on docker.
 
 ---
 
@@ -17,7 +17,7 @@ This project is a community-driven, unofficial repository designed to help peopl
 
 We welcome contributions such as:
 
-- ✅ New YAML quiz files for DCA topics
+- ✅ New YAML quiz files
 - ✅ Improvements to existing questions (clarity, accuracy, formatting)
 - ✅ Helpful links to official documentation (Docker or Mirantis)
 - ✅ Typos or syntax corrections
diff --git a/README.md b/README.md
index 11e9fd9..f0559e3 100644
--- a/README.md
+++ b/README.md
@@ -1,11 +1,11 @@
-# Docker Practice – Unofficial DCA Certification Prep
+# Docker Practice - Comprehension training
 
 > ⚠️ **Disclaimer**: This project is **independent and unofficial**. It is **not affiliated**, **endorsed**, or **approved** by Docker Inc., Mirantis, or any of their affiliates.  
 > All quiz questions and content are **community-made** for educational and personal preparation purposes only.
 
 ## 📘 About this project
 
-This repository offers a comprehensive collection of YAML-based quiz questions to help you prepare for the **Docker Certified Associate (DCA)** exam — based on the **Mirantis DCA Study Guide (2025)**.
+This repository offers a comprehensive collection of YAML-based quiz questions to help to train based on the **Mirantis DCA Study Guide (2025)**.
 
 The goal is to help candidates:
 - Test their knowledge of Docker engine, networking, security, orchestration, image management, and more.
@@ -17,7 +17,7 @@ The goal is to help candidates:
 - ✅ **YAML-formatted questions** with:
     - `uuid`, `question`, `answers`, `correct` flag
     - `help` field pointing to the official documentation when applicable
-- 🗂️ Organized by DCA topics:
+- 🗂️ Organized by topics:
     - Installation, Configuration, Security, Orchestration, Images, Registry, Volumes, Networking, etc.
 - 🧠 Focused on **learning**, **not memorization**
 
diff --git a/data/1_Orchestration/add_networks_publish_ports.yaml b/data/1_Orchestration/add_networks_publish_ports.yaml
index 7b38127..84358f6 100644
--- a/data/1_Orchestration/add_networks_publish_ports.yaml
+++ b/data/1_Orchestration/add_networks_publish_ports.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: d55eac70-b350-4372-b5f2-9de85c09cadd
     question: What is the default network driver used by Docker?
     answers:
-      - { value: "macvlan", correct: false }
-      - { value: "host", correct: false }
-      - { value: "bridge", correct: true }
-      - { value: "overlay", correct: false }
+      - { value: 'macvlan', correct: false }
+      - { value: 'host', correct: false }
+      - { value: 'bridge', correct: true }
+      - { value: 'overlay', correct: false }
     help: https://docs.docker.com/network/
 
   - uuid: 1819e7eb-5d38-49f8-a6cb-abc5c7e6d5b1
     question: Which flag is used to publish a port from a container to the host?
     answers:
-      - { value: "--network", correct: false }
-      - { value: "--expose", correct: false }
-      - { value: "--dns", correct: false }
-      - { value: "-p", correct: true }
+      - { value: '--network', correct: false }
+      - { value: '--expose', correct: false }
+      - { value: '--dns', correct: false }
+      - { value: '-p', correct: true }
     help: https://docs.docker.com/network/
 
   - uuid: 3b7f5025-6b0f-4d3e-b91d-7fa84d392a4e
     question: What does the command `docker run -p 8080:80 nginx` do?
     answers:
-      - { value: "It publishes all container ports to the host", correct: false }
-      - { value: "It maps port 80 on the host to port 8080 in the container", correct: false }
-      - { value: "It exposes port 80 in the container only", correct: false }
-      - { value: "It maps port 8080 on the host to port 80 in the container", correct: true }
+      - { value: 'It publishes all container ports to the host', correct: false }
+      - { value: 'It maps port 80 on the host to port 8080 in the container', correct: false }
+      - { value: 'It exposes port 80 in the container only', correct: false }
+      - { value: 'It maps port 8080 on the host to port 80 in the container', correct: true }
     help: https://docs.docker.com/network/
 
   - uuid: a6c9a839-cf4a-4de6-a24d-b4e0b40c76c3
     question: What is a user-defined bridge network useful for?
     answers:
-      - { value: "Publishing ports to the internet", correct: false }
-      - { value: "Allowing containers to communicate by name", correct: true }
-      - { value: "Configuring IPv6 for containers", correct: false }
-      - { value: "Enabling external DNS resolution", correct: false }
+      - { value: 'Publishing ports to the internet', correct: false }
+      - { value: 'Allowing containers to communicate by name', correct: true }
+      - { value: 'Configuring IPv6 for containers', correct: false }
+      - { value: 'Enabling external DNS resolution', correct: false }
     help: https://docs.docker.com/network/
 
   - uuid: b7d01f2b-4dfb-4b7e-b0cf-0f73e2c2d884
     question: What happens if you use the `none` network driver?
     answers:
-      - { value: "The container has full internet access", correct: false }
-      - { value: "The container shares network with another container", correct: false }
-      - { value: "The container has no network access", correct: true }
-      - { value: "The container uses host networking", correct: false }
+      - { value: 'The container has full internet access', correct: false }
+      - { value: 'The container shares network with another container', correct: false }
+      - { value: 'The container has no network access', correct: true }
+      - { value: 'The container uses host networking', correct: false }
     help: https://docs.docker.com/network/
 
   - uuid: 4e1a16e1-cb62-4a4c-8c8b-4a1b4a707eb8
     question: Which driver allows containers on different hosts to communicate in a Swarm?
     answers:
-      - { value: "bridge", correct: false }
-      - { value: "overlay", correct: true }
-      - { value: "host", correct: false }
-      - { value: "ipvlan", correct: false }
+      - { value: 'bridge', correct: false }
+      - { value: 'overlay', correct: true }
+      - { value: 'host', correct: false }
+      - { value: 'ipvlan', correct: false }
     help: https://docs.docker.com/network/
 
   - uuid: 1bdb9159-f16a-4cf7-bcb9-b6aa64c4562d
     question: How can you make a port published to the host only accessible from localhost?
     answers:
-      - { value: "Use -p 127.0.0.1:8080:80", correct: true }
-      - { value: "Use -p 0.0.0.0:8080:80", correct: false }
-      - { value: "Use --network host", correct: false }
-      - { value: "Use --expose 80", correct: false }
+      - { value: 'Use -p 127.0.0.1:8080:80', correct: true }
+      - { value: 'Use -p 0.0.0.0:8080:80', correct: false }
+      - { value: 'Use --network host', correct: false }
+      - { value: 'Use --expose 80', correct: false }
     help: https://docs.docker.com/network/
 
   - uuid: d2f5124d-d5e3-4043-8ee1-f29e8c0dc553
     question: Which network mode removes isolation between container and host?
     answers:
-      - { value: "host", correct: true }
-      - { value: "overlay", correct: false }
-      - { value: "none", correct: false }
-      - { value: "bridge", correct: false }
+      - { value: 'host', correct: true }
+      - { value: 'overlay', correct: false }
+      - { value: 'none', correct: false }
+      - { value: 'bridge', correct: false }
     help: https://docs.docker.com/network/
 
   - uuid: 44d54f24-b71c-4214-87fd-402e3a128db1
     question: How do you connect a running container to a new network?
     answers:
-      - { value: "docker run --connect", correct: false }
-      - { value: "docker network connect", correct: true }
-      - { value: "docker connect", correct: false }
-      - { value: "docker attach --network", correct: false }
+      - { value: 'docker run --connect', correct: false }
+      - { value: 'docker network connect', correct: true }
+      - { value: 'docker connect', correct: false }
+      - { value: 'docker attach --network', correct: false }
     help: https://docs.docker.com/network/
 
   - uuid: a3d1e117-9e71-4c55-b1bc-f26bc03e7b1f
     question: Which flag assigns a specific IP address to a container on a network?
     answers:
-      - { value: "--ip", correct: true }
-      - { value: "--hostname", correct: false }
-      - { value: "--address", correct: false }
-      - { value: "--dns-ip", correct: false }
+      - { value: '--ip', correct: true }
+      - { value: '--hostname', correct: false }
+      - { value: '--address', correct: false }
+      - { value: '--dns-ip', correct: false }
     help: https://docs.docker.com/network/
diff --git a/data/1_Orchestration/apply_node_labels_placement_tasks.yaml b/data/1_Orchestration/apply_node_labels_placement_tasks.yaml
index 46eccac..caa2187 100644
--- a/data/1_Orchestration/apply_node_labels_placement_tasks.yaml
+++ b/data/1_Orchestration/apply_node_labels_placement_tasks.yaml
@@ -2,115 +2,115 @@ questions:
   - uuid: 6cc6a97c-52dc-40c7-9cd3-7ef57709a38c
     question: What command adds a label to a Docker Swarm node?
     answers:
-      - { value: "docker service create --label", correct: false }
-      - { value: "docker node update --label-add", correct: true }
-      - { value: "docker swarm label add", correct: false }
-      - { value: "docker label node", correct: false }
+      - { value: 'docker service create --label', correct: false }
+      - { value: 'docker node update --label-add', correct: true }
+      - { value: 'docker swarm label add', correct: false }
+      - { value: 'docker label node', correct: false }
     help: https://docs.docker.com/reference/cli/docker/node/update/
 
   - uuid: b0633cfc-51d0-4b00-a97f-0882b2689f08
     question: How can you inspect the labels of a node?
     answers:
-      - { value: "docker node list --labels", correct: false }
-      - { value: "docker inspect --labels", correct: false }
-      - { value: "docker node inspect <node> --pretty", correct: true }
-      - { value: "docker node info", correct: false }
+      - { value: 'docker node list --labels', correct: false }
+      - { value: 'docker inspect --labels', correct: false }
+      - { value: 'docker node inspect <node> --pretty', correct: true }
+      - { value: 'docker node info', correct: false }
     help: https://docs.docker.com/reference/cli/docker/node/inspect/
 
   - uuid: a372b99d-0e1e-4e58-80ed-818e948c0e30
     question: What placement constraint ensures a service runs only on nodes with a specific label?
     answers:
-      - { value: "--require-label key=value", correct: false }
-      - { value: "--constraint 'node.labels.key == value'", correct: true }
-      - { value: "--affinity key=value", correct: false }
-      - { value: "--label 'key=value'", correct: false }
+      - { value: '--require-label key=value', correct: false }
+      - { value: '--constraint node.labels.key == value', correct: true }
+      - { value: '--affinity key=value', correct: false }
+      - { value: '--label key=value', correct: false }
     help: https://docs.docker.com/engine/swarm/services/#placement-constraints
 
   - uuid: e187c71b-dbf3-4488-b1d5-009d5ff3a383
     question: What is the purpose of node labels in a Swarm cluster?
     answers:
-      - { value: "To enforce security policies", correct: false }
-      - { value: "To prioritize CPU resource allocation", correct: false }
-      - { value: "To identify the container logs per node", correct: false }
-      - { value: "To control where services are deployed using constraints", correct: true }
+      - { value: 'To enforce security policies', correct: false }
+      - { value: 'To prioritize CPU resource allocation', correct: false }
+      - { value: 'To identify the container logs per node', correct: false }
+      - { value: 'To control where services are deployed using constraints', correct: true }
     help: https://docs.docker.com/engine/swarm/services/#placement-constraints
 
   - uuid: c8db2350-5126-43f4-bf6b-dfddf71a3c15
     question: What happens if no node satisfies the placement constraint?
     answers:
-      - { value: "The service is deployed on all nodes", correct: false }
-      - { value: "The service is not deployed", correct: true }
-      - { value: "The service is ignored", correct: false }
-      - { value: "Docker overrides the constraint", correct: false }
+      - { value: 'The service is deployed on all nodes', correct: false }
+      - { value: 'The service is not deployed', correct: true }
+      - { value: 'The service is ignored', correct: false }
+      - { value: 'Docker overrides the constraint', correct: false }
     help: https://docs.docker.com/engine/swarm/services/#placement-constraints
 
   - uuid: 63a88ed9-7ba3-4a9d-b0ae-76e54e6fa8a0
     question: How do you deploy a service to nodes labeled `env=production`?
     answers:
-      - { value: "docker node create --label 'env=production'", correct: false }
-      - { value: "docker service create --constraint 'node.labels.env == production'", correct: true }
-      - { value: "docker service create --label 'env=production'", correct: false }
-      - { value: "docker run --env production", correct: false }
+      - { value: 'docker node create --label env=production', correct: false }
+      - { value: 'docker service create --constraint node.labels.env == production', correct: true }
+      - { value: 'docker service create --label env=production', correct: false }
+      - { value: 'docker run --env production', correct: false }
     help: https://docs.docker.com/engine/swarm/services/#placement-constraints
 
   - uuid: b85fcb9d-9936-4a41-bc64-c54084ac0b36
     question: Can node labels be used to filter nodes when scaling services?
     answers:
-      - { value: "No, scaling ignores node labels", correct: false }
-      - { value: "Yes, placement constraints apply during scaling", correct: true }
-      - { value: "Only for global services", correct: false }
-      - { value: "Only for daemon sets", correct: false }
+      - { value: 'No, scaling ignores node labels', correct: false }
+      - { value: 'Yes, placement constraints apply during scaling', correct: true }
+      - { value: 'Only for global services', correct: false }
+      - { value: 'Only for daemon sets', correct: false }
     help: https://docs.docker.com/engine/swarm/services/#placement-constraints
 
   - uuid: 2a6e9114-8717-498e-8f65-7052ac28c3c6
     question: How do you remove a label from a node?
     answers:
-      - { value: "docker node update --label-rm <label>", correct: true }
-      - { value: "docker node label remove", correct: false }
-      - { value: "docker label rm", correct: false }
-      - { value: "docker node delete label", correct: false }
+      - { value: 'docker node update --label-rm <label>', correct: true }
+      - { value: 'docker node label remove', correct: false }
+      - { value: 'docker label rm', correct: false }
+      - { value: 'docker node delete label', correct: false }
     help: https://docs.docker.com/reference/cli/docker/node/update/
 
   - uuid: 45fc67df-81be-4b4b-a96f-4de88ac5856f
     question: Can a service have multiple placement constraints?
     answers:
-      - { value: "Only if --mode=global", correct: false }
-      - { value: "Only with node affinity enabled", correct: false }
-      - { value: "No, only one is allowed", correct: false }
-      - { value: "Yes, use multiple --constraint flags", correct: true }
+      - { value: 'Only if --mode=global', correct: false }
+      - { value: 'Only with node affinity enabled', correct: false }
+      - { value: 'No, only one is allowed', correct: false }
+      - { value: 'Yes, use multiple --constraint flags', correct: true }
     help: https://docs.docker.com/engine/swarm/services/#placement-constraints
   - uuid: f08f5a14-376a-4f56-a5d5-6b9ed18f82c5
     question: Where are node labels stored in a Docker Swarm cluster?
     answers:
-      - { value: "In the image layer", correct: false }
-      - { value: "In the Raft log replicated across all managers", correct: true }
+      - { value: 'In the image layer', correct: false }
+      - { value: 'In the Raft log replicated across all managers', correct: true }
       - { value: "Only in the local node's filesystem", correct: false }
-      - { value: "In container metadata", correct: false }
+      - { value: 'In container metadata', correct: false }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/nodes/
 
   - uuid: 7a233b58-f90a-4692-bfa2-2466c86b6303
     question: What happens if a node with a required label is removed from the cluster?
     answers:
-      - { value: "The label is ignored and the task is rescheduled anywhere", correct: false }
-      - { value: "The service is stopped entirely", correct: false }
-      - { value: "The cluster auto-applies the label to another node", correct: false }
-      - { value: "Tasks using that constraint are rescheduled only if another node has the label", correct: true }
+      - { value: 'The label is ignored and the task is rescheduled anywhere', correct: false }
+      - { value: 'The service is stopped entirely', correct: false }
+      - { value: 'The cluster auto-applies the label to another node', correct: false }
+      - { value: 'Tasks using that constraint are rescheduled only if another node has the label', correct: true }
     help: https://docs.docker.com/engine/swarm/services/#placement-constraints
 
   - uuid: b2e91bbf-21fa-4fd9-8c83-e4a64676e750
     question: Which file can define placement constraints when using docker stack deploy?
     answers:
-      - { value: "swarm-config.json", correct: false }
-      - { value: "Dockerfile", correct: false }
-      - { value: "service.conf", correct: false }
-      - { value: "docker-compose.yml with 'deploy.placement.constraints'", correct: true }
+      - { value: 'swarm-config.json', correct: false }
+      - { value: 'Dockerfile', correct: false }
+      - { value: 'service.conf', correct: false }
+      - { value: 'docker-compose.yml with deploy.placement.constraints', correct: true }
     help: https://docs.docker.com/compose/compose-file/compose-file-v3/#placement
 
   - uuid: 6eb90544-0bdf-49ea-b6ed-4fcad88fc7b7
     question: Which command shows all nodes with their labels?
     answers:
-      - { value: "docker service inspect --labels", correct: false }
-      - { value: "docker node show-labels", correct: false }
-      - { value: "docker inspect --type node", correct: false }
-      - { value: "docker node ls && docker node inspect <node>", correct: true }
+      - { value: 'docker service inspect --labels', correct: false }
+      - { value: 'docker node show-labels', correct: false }
+      - { value: 'docker inspect --type node', correct: false }
+      - { value: 'docker node ls && docker node inspect <node>', correct: true }
     help: https://docs.docker.com/reference/cli/docker/node/inspect/
diff --git a/data/1_Orchestration/complete_setup_swarm_mode_cluster_managers_worker_nodes.yaml b/data/1_Orchestration/complete_setup_swarm_mode_cluster_managers_worker_nodes.yaml
index 57b4f50..3a20b79 100644
--- a/data/1_Orchestration/complete_setup_swarm_mode_cluster_managers_worker_nodes.yaml
+++ b/data/1_Orchestration/complete_setup_swarm_mode_cluster_managers_worker_nodes.yaml
@@ -2,179 +2,179 @@ questions:
   - uuid: d111dbe3-907f-41cd-9b28-8be4c3c1ae99
     question: What command initializes a Docker Swarm cluster?
     answers:
-      - { value: "docker swarm start", correct: false }
-      - { value: "docker swarm init", correct: true }
-      - { value: "docker swarm enable", correct: false }
-      - { value: "docker swarm create", correct: false }
+      - { value: 'docker swarm start', correct: false }
+      - { value: 'docker swarm init', correct: true }
+      - { value: 'docker swarm enable', correct: false }
+      - { value: 'docker swarm create', correct: false }
     help: https://docs.docker.com/engine/swarm/admin_guide/
 
   - uuid: 83beef23-d18b-48a8-a2e4-4f88fe20c262
     question: Which command provides the join token for worker nodes?
     answers:
-      - { value: "docker swarm token", correct: false }
-      - { value: "docker swarm join-token worker", correct: true }
-      - { value: "docker swarm get-token", correct: false }
-      - { value: "docker node join-token worker", correct: false }
+      - { value: 'docker swarm token', correct: false }
+      - { value: 'docker swarm join-token worker', correct: true }
+      - { value: 'docker swarm get-token', correct: false }
+      - { value: 'docker node join-token worker', correct: false }
     help: https://docs.docker.com/engine/swarm/admin_guide/
 
   - uuid: 4b89cc5e-6246-47bc-b37c-98183e139cb5
     question: What port must be open for Swarm manager communication?
     answers:
-      - { value: "443", correct: false }
-      - { value: "2377", correct: true }
-      - { value: "4789", correct: false }
-      - { value: "7946", correct: false }
+      - { value: '443', correct: false }
+      - { value: '2377', correct: true }
+      - { value: '4789', correct: false }
+      - { value: '7946', correct: false }
     help: https://docs.docker.com/engine/swarm/admin_guide/
 
   - uuid: 7e73541c-343e-41cd-b64d-7f3dd9e2b993
     question: What is required to join a node to a Swarm cluster?
     answers:
-      - { value: "Join token and manager IP", correct: true }
-      - { value: "TLS certificate", correct: false }
-      - { value: "Node alias and hostname", correct: false }
-      - { value: "Service definition", correct: false }
+      - { value: 'Join token and manager IP', correct: true }
+      - { value: 'TLS certificate', correct: false }
+      - { value: 'Node alias and hostname', correct: false }
+      - { value: 'Service definition', correct: false }
     help: https://docs.docker.com/engine/swarm/admin_guide/
 
   - uuid: b1c7e6e9-7306-4533-9502-cc28bfe9f9b6
     question: Which command joins a node as a worker to a Swarm?
     answers:
-      - { value: "docker swarm connect --worker", correct: false }
-      - { value: "docker join swarm --worker", correct: false }
-      - { value: "docker worker join", correct: false }
-      - { value: "docker swarm join --token <token> <manager_ip>:2377", correct: true }
+      - { value: 'docker swarm connect --worker', correct: false }
+      - { value: 'docker join swarm --worker', correct: false }
+      - { value: 'docker worker join', correct: false }
+      - { value: 'docker swarm join --token <token> <manager_ip>:2377', correct: true }
     help: https://docs.docker.com/engine/swarm/admin_guide/
 
   - uuid: e69e4a5d-77b4-4be4-a7ee-4b2b4c1a8a94
     question: Which command lists nodes in a Swarm?
     answers:
-      - { value: "docker nodes", correct: false }
-      - { value: "docker node ls", correct: true }
-      - { value: "docker node status", correct: false }
-      - { value: "docker swarm list", correct: false }
+      - { value: 'docker nodes', correct: false }
+      - { value: 'docker node ls', correct: true }
+      - { value: 'docker node status', correct: false }
+      - { value: 'docker swarm list', correct: false }
     help: https://docs.docker.com/engine/swarm/admin_guide/
 
   - uuid: f631c1b0-5c27-4bb3-b5f5-104b02ae49a0
     question: How can you promote a worker to a manager?
     answers:
-      - { value: "docker node promote <node_name>", correct: true }
-      - { value: "docker promote node <node_name>", correct: false }
-      - { value: "docker swarm promote <node>", correct: false }
-      - { value: "docker manager add <node>", correct: false }
+      - { value: 'docker node promote <node_name>', correct: true }
+      - { value: 'docker promote node <node_name>', correct: false }
+      - { value: 'docker swarm promote <node>', correct: false }
+      - { value: 'docker manager add <node>', correct: false }
     help: https://docs.docker.com/engine/swarm/admin_guide/
 
   - uuid: aea13f0e-8fd1-4e53-b7a4-5cf646a6b184
     question: What is the minimum number of managers required to tolerate one failure?
     answers:
-      - { value: "3", correct: true }
-      - { value: "2", correct: false }
-      - { value: "1", correct: false }
-      - { value: "5", correct: false }
+      - { value: '3', correct: true }
+      - { value: '2', correct: false }
+      - { value: '1', correct: false }
+      - { value: '5', correct: false }
     help: https://docs.docker.com/engine/swarm/admin_guide/
 
   - uuid: 9c4d3060-f2aa-4a9b-a6e0-4ea1bb87001b
     question: Which command rotates the join tokens for security?
     answers:
-      - { value: "docker swarm init --reset-tokens", correct: false }
-      - { value: "docker swarm rotate-token", correct: false }
-      - { value: "docker swarm join-token --rotate", correct: true }
-      - { value: "docker node rotate", correct: false }
+      - { value: 'docker swarm init --reset-tokens', correct: false }
+      - { value: 'docker swarm rotate-token', correct: false }
+      - { value: 'docker swarm join-token --rotate', correct: true }
+      - { value: 'docker node rotate', correct: false }
     help: https://docs.docker.com/engine/swarm/admin_guide/
 
   - uuid: f99376bb-3672-4f08-99bb-c5a7b2b49c45
     question: What is the default behavior of a node after joining a Swarm?
     answers:
-      - { value: "It acts as a worker", correct: true }
-      - { value: "It automatically becomes a manager", correct: false }
-      - { value: "It starts a service", correct: false }
-      - { value: "It initializes a new Swarm", correct: false }
+      - { value: 'It acts as a worker', correct: true }
+      - { value: 'It automatically becomes a manager', correct: false }
+      - { value: 'It starts a service', correct: false }
+      - { value: 'It initializes a new Swarm', correct: false }
     help: https://docs.docker.com/engine/swarm/admin_guide/
 
   - uuid: 88ef38e7-eef9-4a35-a164-e6ddfb22e729
     question: How is manager quorum calculated in Docker Swarm?
     answers:
-      - { value: "At least one manager must be online", correct: false }
-      - { value: "A majority of managers must be available", correct: true }
-      - { value: "50% of all nodes", correct: false }
-      - { value: "All managers must be running", correct: false }
+      - { value: 'At least one manager must be online', correct: false }
+      - { value: 'A majority of managers must be available', correct: true }
+      - { value: '50% of all nodes', correct: false }
+      - { value: 'All managers must be running', correct: false }
     help: https://docs.docker.com/engine/swarm/admin_guide/
 
   - uuid: 5ad67aa2-cbe3-4a4a-b29d-05f13545f117
     question: What command leaves a Swarm node and removes all state?
     answers:
-      - { value: "docker swarm leave --force", correct: true }
-      - { value: "docker swarm disconnect", correct: false }
-      - { value: "docker swarm quit", correct: false }
-      - { value: "docker node remove", correct: false }
+      - { value: 'docker swarm leave --force', correct: true }
+      - { value: 'docker swarm disconnect', correct: false }
+      - { value: 'docker swarm quit', correct: false }
+      - { value: 'docker node remove', correct: false }
     help: https://docs.docker.com/engine/swarm/admin_guide/
 
   - uuid: 4d2345fc-f5df-4cf6-bf46-e99a6333de55
     question: How do you force a node to rejoin a Swarm with a new role?
     answers:
-      - { value: "Restart the node with --role flag", correct: false }
-      - { value: "Reboot the manager", correct: false }
-      - { value: "Use docker swarm switch-role", correct: false }
-      - { value: "Leave the Swarm and rejoin with the new token", correct: true }
+      - { value: 'Restart the node with --role flag', correct: false }
+      - { value: 'Reboot the manager', correct: false }
+      - { value: 'Use docker swarm switch-role', correct: false }
+      - { value: 'Leave the Swarm and rejoin with the new token', correct: true }
     help: https://docs.docker.com/engine/swarm/admin_guide/
 
   - uuid: b89d1e15-87a6-4ef9-991d-94e5091c194f
     question: What happens if a Swarm loses quorum?
     answers:
-      - { value: "All services stop", correct: false }
-      - { value: "The Swarm switches to standalone mode", correct: false }
-      - { value: "Managers cannot make scheduling decisions", correct: true }
-      - { value: "Workers stop running containers", correct: false }
+      - { value: 'All services stop', correct: false }
+      - { value: 'The Swarm switches to standalone mode', correct: false }
+      - { value: 'Managers cannot make scheduling decisions', correct: true }
+      - { value: 'Workers stop running containers', correct: false }
     help: https://docs.docker.com/engine/swarm/admin_guide/
 
   - uuid: 190a33f2-42fc-4f26-86e6-5c87069f5fa6
     question: Which roles can schedule services in Swarm?
     answers:
-      - { value: "Managers only", correct: true }
-      - { value: "Workers only", correct: false }
-      - { value: "None, only the CLI schedules", correct: false }
-      - { value: "Both managers and workers", correct: false }
+      - { value: 'Managers only', correct: true }
+      - { value: 'Workers only', correct: false }
+      - { value: 'None, only the CLI schedules', correct: false }
+      - { value: 'Both managers and workers', correct: false }
     help: https://docs.docker.com/engine/swarm/admin_guide/
 
   - uuid: e8163c62-013b-4b84-bcc6-d51247618b87
     question: How can you identify a manager node?
     answers:
-      - { value: "docker manager status", correct: false }
-      - { value: "docker info --role manager", correct: false }
-      - { value: "docker node ls shows `Leader` or `Reachable`", correct: true }
-      - { value: "docker swarm role manager", correct: false }
+      - { value: 'docker manager status', correct: false }
+      - { value: 'docker info --role manager', correct: false }
+      - { value: 'docker node ls shows `Leader` or `Reachable`', correct: true }
+      - { value: 'docker swarm role manager', correct: false }
     help: https://docs.docker.com/engine/swarm/admin_guide/
 
   - uuid: 0d2b1a8e-588f-4939-8f3d-712183646f55
     question: What flag allows you to advertise a specific IP when initializing the Swarm?
     answers:
-      - { value: "--bind-ip", correct: false }
-      - { value: "--host", correct: false }
-      - { value: "--init-ip", correct: false }
-      - { value: "--advertise-addr", correct: true }
+      - { value: '--bind-ip', correct: false }
+      - { value: '--host', correct: false }
+      - { value: '--init-ip', correct: false }
+      - { value: '--advertise-addr', correct: true }
     help: https://docs.docker.com/engine/swarm/admin_guide/
 
   - uuid: 50e16c5d-6f3b-48a4-858a-cb3c97dd6fbd
     question: Where are Swarm metadata and certificates stored?
     answers:
-      - { value: "/var/lib/docker/swarm", correct: true }
-      - { value: "/opt/docker/swarm", correct: false }
-      - { value: "/root/.docker/swarm", correct: false }
-      - { value: "/etc/docker/swarm", correct: false }
+      - { value: '/var/lib/docker/swarm', correct: true }
+      - { value: '/opt/docker/swarm', correct: false }
+      - { value: '/root/.docker/swarm', correct: false }
+      - { value: '/etc/docker/swarm', correct: false }
     help: https://docs.docker.com/engine/swarm/admin_guide/
 
   - uuid: 2b7fbc91-f2d0-4ef6-b1ea-8aebff36507b
     question: Which network is used by default for service-to-service communication in Swarm?
     answers:
-      - { value: "ingress", correct: true }
-      - { value: "internal", correct: false }
-      - { value: "host", correct: false }
-      - { value: "bridge", correct: false }
+      - { value: 'ingress', correct: true }
+      - { value: 'internal', correct: false }
+      - { value: 'host', correct: false }
+      - { value: 'bridge', correct: false }
     help: https://docs.docker.com/engine/swarm/admin_guide/
 
   - uuid: 4f46ac3c-95b5-4fe6-8b36-bd6d3e87b404
     question: How do you demote a manager to a worker?
     answers:
-      - { value: "docker node delete-role", correct: false }
-      - { value: "docker swarm drop-manager <node_name>", correct: false }
-      - { value: "docker node demote <node_name>", correct: true }
-      - { value: "docker node revoke <node_name>", correct: false }
+      - { value: 'docker node delete-role', correct: false }
+      - { value: 'docker swarm drop-manager <node_name>', correct: false }
+      - { value: 'docker node demote <node_name>', correct: true }
+      - { value: 'docker node revoke <node_name>', correct: false }
     help: https://docs.docker.com/engine/swarm/admin_guide/
diff --git a/data/1_Orchestration/convert_to_stack_file.yaml b/data/1_Orchestration/convert_to_stack_file.yaml
index 37f1da2..cd8e730 100644
--- a/data/1_Orchestration/convert_to_stack_file.yaml
+++ b/data/1_Orchestration/convert_to_stack_file.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: 2099f768-7f9f-4f47-9e77-846cb4ea41f2
     question: What is the main purpose of using 'docker stack deploy'?
     answers:
-      - { value: "To load images from Docker Hub", correct: false }
-      - { value: "To create a single container from a Dockerfile", correct: false }
-      - { value: "To deploy a multi-service application to a Swarm cluster", correct: true }
-      - { value: "To restart a failed container manually", correct: false }
+      - { value: 'To load images from Docker Hub', correct: false }
+      - { value: 'To create a single container from a Dockerfile', correct: false }
+      - { value: 'To deploy a multi-service application to a Swarm cluster', correct: true }
+      - { value: 'To restart a failed container manually', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/stack/deploy/'
 
   - uuid: d16be146-7391-421f-9c6a-2f1789a18054
     question: Which file is typically used with 'docker stack deploy'?
     answers:
-      - { value: "A JSON file defining container specs", correct: false }
-      - { value: "A Docker Compose file in YAML format", correct: true }
-      - { value: "A shell script with container commands", correct: false }
-      - { value: "A Dockerfile", correct: false }
+      - { value: 'A JSON file defining container specs', correct: false }
+      - { value: 'A Docker Compose file in YAML format', correct: true }
+      - { value: 'A shell script with container commands', correct: false }
+      - { value: 'A Dockerfile', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/stack/deploy/'
 
   - uuid: 9b4f31db-8a1d-49df-ae4c-43d7a3df76c3
     question: What option must be specified with 'docker stack deploy' to define the Compose file?
     answers:
-      - { value: "--stack-yaml", correct: false }
-      - { value: "--compose-file", correct: true }
-      - { value: "--config", correct: false }
-      - { value: "--dockerfile", correct: false }
+      - { value: '--stack-yaml', correct: false }
+      - { value: '--compose-file', correct: true }
+      - { value: '--config', correct: false }
+      - { value: '--dockerfile', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/stack/deploy/'
 
   - uuid: 90b36888-fd98-4ec0-9ee0-700ee91f19b0
     question: What must be true before using 'docker stack deploy'?
     answers:
-      - { value: "The image must be local only", correct: false }
-      - { value: "A container must be running", correct: false }
-      - { value: "The registry must be private", correct: false }
-      - { value: "Docker must be in Swarm mode", correct: true }
+      - { value: 'The image must be local only', correct: false }
+      - { value: 'A container must be running', correct: false }
+      - { value: 'The registry must be private', correct: false }
+      - { value: 'Docker must be in Swarm mode', correct: true }
     help: 'https://docs.docker.com/engine/swarm/stack-deploy/'
 
   - uuid: c08c4bfc-48d5-4639-9be4-9b2077f1372a
     question: What happens if you use 'docker stack deploy' with an invalid YAML file?
     answers:
-      - { value: "The deployment fails with an error", correct: true }
-      - { value: "Docker ignores the invalid lines", correct: false }
-      - { value: "It runs in legacy mode", correct: false }
-      - { value: "The stack is created but services are missing", correct: false }
+      - { value: 'The deployment fails with an error', correct: true }
+      - { value: 'Docker ignores the invalid lines', correct: false }
+      - { value: 'It runs in legacy mode', correct: false }
+      - { value: 'The stack is created but services are missing', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/stack/deploy/'
 
   - uuid: 222d6b17-8a6e-49a4-8023-8e4ae265abeb
     question: Which command can be used to remove a stack deployed via Compose?
     answers:
-      - { value: "docker service rm <stack-name>", correct: false }
-      - { value: "docker container prune", correct: false }
-      - { value: "docker stack rm <stack-name>", correct: true }
-      - { value: "docker compose down", correct: false }
+      - { value: 'docker service rm <stack-name>', correct: false }
+      - { value: 'docker container prune', correct: false }
+      - { value: 'docker stack rm <stack-name>', correct: true }
+      - { value: 'docker compose down', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/stack/rm/'
 
   - uuid: 4178ab3b-79d1-4c43-84a9-d48648a0a4ec
     question: How do you deploy a stack named 'myapp' using a file called 'docker-compose.yml'?
     answers:
-      - { value: "docker stack up myapp", correct: false }
-      - { value: "docker deploy -f docker-compose.yml myapp", correct: false }
-      - { value: "docker stack deploy -c docker-compose.yml myapp", correct: true }
-      - { value: "docker-compose deploy myapp", correct: false }
+      - { value: 'docker stack up myapp', correct: false }
+      - { value: 'docker deploy -f docker-compose.yml myapp', correct: false }
+      - { value: 'docker stack deploy -c docker-compose.yml myapp', correct: true }
+      - { value: 'docker-compose deploy myapp', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/stack/deploy/'
 
   - uuid: c0fded31-f244-4dd9-b146-4d3fcf2bba38
     question: What is a key limitation of 'docker stack deploy' compared to 'docker-compose up'?
     answers:
-      - { value: "It cannot run on Linux", correct: false }
-      - { value: "It only works with Swarm", correct: true }
-      - { value: "It does not support volumes", correct: false }
-      - { value: "It uses JSON instead of YAML", correct: false }
+      - { value: 'It cannot run on Linux', correct: false }
+      - { value: 'It only works with Swarm', correct: true }
+      - { value: 'It does not support volumes', correct: false }
+      - { value: 'It uses JSON instead of YAML', correct: false }
     help: 'https://docs.docker.com/compose/compose-file/compose-versioning/'
 
   - uuid: 964ecf03-812b-45fd-873c-9d758b5cb429
     question: Which instruction is ignored when using a Compose file with docker stack deploy?
     answers:
-      - { value: "image", correct: false }
-      - { value: "ports", correct: false }
-      - { value: "deploy", correct: false }
-      - { value: "build", correct: true }
+      - { value: 'image', correct: false }
+      - { value: 'ports', correct: false }
+      - { value: 'deploy', correct: false }
+      - { value: 'build', correct: true }
     help: 'https://docs.docker.com/reference/cli/docker/stack/deploy/#deploying-services-with-build'
 
   - uuid: 6c8653a6-df41-4393-a15a-d70b3fbb5202
     question: What Docker Compose file version is required to use 'deploy' keys like replicas or update_config?
     answers:
-      - { value: "version 2", correct: false }
-      - { value: "version 3.x", correct: true }
-      - { value: "Any version", correct: false }
-      - { value: "version 1", correct: false }
+      - { value: 'version 2', correct: false }
+      - { value: 'version 3.x', correct: true }
+      - { value: 'Any version', correct: false }
+      - { value: 'version 1', correct: false }
     help: 'https://docs.docker.com/compose/compose-file/compose-versioning/'
diff --git a/data/1_Orchestration/describe_difference_between_running_container_and_service.yaml b/data/1_Orchestration/describe_difference_between_running_container_and_service.yaml
index 73106ca..194dca4 100644
--- a/data/1_Orchestration/describe_difference_between_running_container_and_service.yaml
+++ b/data/1_Orchestration/describe_difference_between_running_container_and_service.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: 07663ef6-f43e-49a1-8b67-1ae7606d74dc
     question: What is the main difference between a container and a service in Docker?
     answers:
-      - { value: "A service runs only on Kubernetes", correct: false }
-      - { value: "A container is a single running instance; a service can manage multiple replicas", correct: true }
-      - { value: "A container is available only in Swarm mode", correct: false }
-      - { value: "A service is used only for debugging", correct: false }
+      - { value: 'A service runs only on Kubernetes', correct: false }
+      - { value: 'A container is a single running instance; a service can manage multiple replicas', correct: true }
+      - { value: 'A container is available only in Swarm mode', correct: false }
+      - { value: 'A service is used only for debugging', correct: false }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/#services-tasks-and-containers
 
   - uuid: 317cf799-80eb-4e33-842c-06efbe9c5f24
     question: Which Docker mode is required to run services?
     answers:
-      - { value: "Debug mode", correct: false }
-      - { value: "Bridge mode", correct: false }
-      - { value: "Swarm mode", correct: true }
-      - { value: "Standalone mode", correct: false }
+      - { value: 'Debug mode', correct: false }
+      - { value: 'Bridge mode', correct: false }
+      - { value: 'Swarm mode', correct: true }
+      - { value: 'Standalone mode', correct: false }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/#services-tasks-and-containers
 
   - uuid: e093d760-cdc6-4202-8d66-3de24fa07a4e
     question: Which Docker command runs a container in standalone mode?
     answers:
-      - { value: "docker service create", correct: false }
-      - { value: "docker run", correct: true }
-      - { value: "docker deploy", correct: false }
-      - { value: "docker swarm init", correct: false }
+      - { value: 'docker service create', correct: false }
+      - { value: 'docker run', correct: true }
+      - { value: 'docker deploy', correct: false }
+      - { value: 'docker swarm init', correct: false }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/#services-tasks-and-containers
 
   - uuid: 8a11e631-48ef-4f3e-9d34-62241c348c95
     question: Which Docker command is used to run a service in Swarm mode?
     answers:
-      - { value: "docker run", correct: false }
-      - { value: "docker service create", correct: true }
-      - { value: "docker compose start", correct: false }
-      - { value: "docker exec", correct: false }
+      - { value: 'docker run', correct: false }
+      - { value: 'docker service create', correct: true }
+      - { value: 'docker compose start', correct: false }
+      - { value: 'docker exec', correct: false }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/#services-tasks-and-containers
 
   - uuid: 8876c479-70bb-4c50-956a-5a9c45bbecad
     question: Which of the following is an advantage of using a service over a single container?
     answers:
-      - { value: "Supports automatic rescheduling and scaling", correct: true }
-      - { value: "Runs faster", correct: false }
-      - { value: "Has less overhead than a container", correct: false }
-      - { value: "Requires fewer resources", correct: false }
+      - { value: 'Supports automatic rescheduling and scaling', correct: true }
+      - { value: 'Runs faster', correct: false }
+      - { value: 'Has less overhead than a container', correct: false }
+      - { value: 'Requires fewer resources', correct: false }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/#services-tasks-and-containers
 
   - uuid: 535cb6d7-4fc9-4d68-97a5-d80099b179d9
     question: In Docker Swarm, how does the system maintain the desired state of a service?
     answers:
-      - { value: "By monitoring and rescheduling failed tasks", correct: true }
-      - { value: "By disabling health checks", correct: false }
-      - { value: "By restarting containers using `docker run`", correct: false }
-      - { value: "By disabling container restarts", correct: false }
+      - { value: 'By monitoring and rescheduling failed tasks', correct: true }
+      - { value: 'By disabling health checks', correct: false }
+      - { value: 'By restarting containers using `docker run`', correct: false }
+      - { value: 'By disabling container restarts', correct: false }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/#services-tasks-and-containers
 
   - uuid: 95f86d63-54e8-4a44-a215-b6be062a58de
     question: What is a task in the context of a Docker Swarm service?
     answers:
-      - { value: "A health check probe", correct: false }
-      - { value: "A label assigned to a worker node", correct: false }
-      - { value: "A Compose YAML definition", correct: false }
-      - { value: "A single container instance managed by the service", correct: true }
+      - { value: 'A health check probe', correct: false }
+      - { value: 'A label assigned to a worker node', correct: false }
+      - { value: 'A Compose YAML definition', correct: false }
+      - { value: 'A single container instance managed by the service', correct: true }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/#services-tasks-and-containers
 
   - uuid: 9c8bc27d-24e2-4c60-b6d0-3e3f08e7c1a4
     question: Which of the following features is **only** available when using services in Swarm?
     answers:
-      - { value: "Port publishing", correct: false }
-      - { value: "Running containers in the background", correct: false }
-      - { value: "Volume mounting", correct: false }
-      - { value: "Load balancing across replicas", correct: true }
+      - { value: 'Port publishing', correct: false }
+      - { value: 'Running containers in the background', correct: false }
+      - { value: 'Volume mounting', correct: false }
+      - { value: 'Load balancing across replicas', correct: true }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/#services-tasks-and-containers
 
   - uuid: 48240365-1b98-4eb3-8e9d-d09b9b9c2d28
     question: What does a Docker Swarm service do when one of its containers fails?
     answers:
-      - { value: "Leaves the system in degraded state", correct: false }
-      - { value: "Stops the entire service", correct: false }
-      - { value: "Automatically reschedules it to another node", correct: true }
-      - { value: "Sends a manual alert to the admin", correct: false }
+      - { value: 'Leaves the system in degraded state', correct: false }
+      - { value: 'Stops the entire service', correct: false }
+      - { value: 'Automatically reschedules it to another node', correct: true }
+      - { value: 'Sends a manual alert to the admin', correct: false }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/#services-tasks-and-containers
 
   - uuid: cdc7beac-55d5-4f8a-86e7-e5e772ec29ed
     question: When should you prefer using a `docker run` over `docker service create`?
     answers:
-      - { value: "When you want replicas automatically managed", correct: false }
-      - { value: "When your application needs global services", correct: false }
-      - { value: "When you want a quick, one-off container without high availability", correct: true }
+      - { value: 'When you want replicas automatically managed', correct: false }
+      - { value: 'When your application needs global services', correct: false }
+      - { value: 'When you want a quick, one-off container without high availability', correct: true }
       - { value: "When you're using Swarm orchestration", correct: false }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/#services-tasks-and-containers
diff --git a/data/1_Orchestration/describe_importance_quorum_swarm_cluster.yaml b/data/1_Orchestration/describe_importance_quorum_swarm_cluster.yaml
index 396b6dd..563cb7f 100644
--- a/data/1_Orchestration/describe_importance_quorum_swarm_cluster.yaml
+++ b/data/1_Orchestration/describe_importance_quorum_swarm_cluster.yaml
@@ -2,93 +2,93 @@ questions:
   - uuid: 61e52cbf-06a5-4a62-bc09-25c50c60f35a
     question: What is the purpose of the Raft consensus algorithm in Docker Swarm?
     answers:
-      - { value: "To replicate containers to every node", correct: false }
-      - { value: "To ensure consistent state across all manager nodes", correct: true }
-      - { value: "To isolate tasks from each other", correct: false }
-      - { value: "To optimize CPU usage across worker nodes", correct: false }
+      - { value: 'To replicate containers to every node', correct: false }
+      - { value: 'To ensure consistent state across all manager nodes', correct: true }
+      - { value: 'To isolate tasks from each other', correct: false }
+      - { value: 'To optimize CPU usage across worker nodes', correct: false }
     help: https://docs.docker.com/engine/swarm/admin_guide/
 
   - uuid: 4cb3c00e-6a91-4c13-8a56-82ebc2a1dc4d
     question: What does quorum mean in the context of a Swarm cluster?
     answers:
-      - { value: "The minimum number of managers that must agree to perform operations", correct: true }
-      - { value: "The total number of nodes in the overlay network", correct: false }
-      - { value: "The number of services running in a cluster", correct: false }
-      - { value: "The number of worker nodes available", correct: false }
+      - { value: 'The minimum number of managers that must agree to perform operations', correct: true }
+      - { value: 'The total number of nodes in the overlay network', correct: false }
+      - { value: 'The number of services running in a cluster', correct: false }
+      - { value: 'The number of worker nodes available', correct: false }
     help: https://docs.docker.com/engine/swarm/admin_guide/
 
   - uuid: 6a92d949-6c73-4ef4-9d92-ec4a3794a7ff
     question: How many managers are needed for quorum in a 5-node Swarm manager cluster?
     answers:
-      - { value: "2", correct: false }
-      - { value: "4", correct: false }
-      - { value: "5", correct: false }
-      - { value: "3", correct: true }
+      - { value: '2', correct: false }
+      - { value: '4', correct: false }
+      - { value: '5', correct: false }
+      - { value: '3', correct: true }
     help: https://docs.docker.com/engine/swarm/admin_guide/
 
 
   - uuid: d5bb7762-4b3f-4566-b832-359e9a1882bb
     question: What happens if quorum is lost in a Docker Swarm cluster?
     answers:
-      - { value: "Existing containers stop running", correct: false }
-      - { value: "Worker nodes shut down", correct: false }
-      - { value: "The overlay network becomes unavailable", correct: false }
-      - { value: "New operations like task rebalancing and scheduling stop", correct: true }
+      - { value: 'Existing containers stop running', correct: false }
+      - { value: 'Worker nodes shut down', correct: false }
+      - { value: 'The overlay network becomes unavailable', correct: false }
+      - { value: 'New operations like task rebalancing and scheduling stop', correct: true }
     help: https://docs.docker.com/engine/swarm/admin_guide/
 
 
   - uuid: 0cfd0af8-4a25-4a9c-87c2-2ea4f33b80c5
     question: Which of the following best describes a key property of Raft consensus in Swarm?
     answers:
-      - { value: "Redundant service logs on workers", correct: false }
-      - { value: "Fault tolerance with consistent replicated state across managers", correct: true }
-      - { value: "Load balancing between containers", correct: false }
-      - { value: "Isolated state per node", correct: false }
+      - { value: 'Redundant service logs on workers', correct: false }
+      - { value: 'Fault tolerance with consistent replicated state across managers', correct: true }
+      - { value: 'Load balancing between containers', correct: false }
+      - { value: 'Isolated state per node', correct: false }
     help: https://docs.docker.com/engine/swarm/admin_guide/
 
 
   - uuid: 7a3c7482-ea0e-4bc5-8e71-8ccaa6b837a2
     question: What role does the Leader Manager play in a Swarm cluster?
     answers:
-      - { value: "It is responsible for scheduling tasks", correct: true }
-      - { value: "It performs image builds", correct: false }
-      - { value: "It manages container logs", correct: false }
-      - { value: "It stores secrets securely", correct: false }
+      - { value: 'It is responsible for scheduling tasks', correct: true }
+      - { value: 'It performs image builds', correct: false }
+      - { value: 'It manages container logs', correct: false }
+      - { value: 'It stores secrets securely', correct: false }
     help: https://docs.docker.com/engine/swarm/admin_guide/
 
 
   - uuid: 4c7fdb99-f9f0-45e6-bdb6-5dfcbf7a40db
     question: What occurs if the Leader Manager fails but quorum is still present?
     answers:
-      - { value: "The cluster is re-initialized", correct: false }
-      - { value: "Worker nodes are promoted automatically", correct: false }
-      - { value: "Swarm shuts down all tasks", correct: false }
-      - { value: "A new leader is elected and scheduling continues", correct: true }
+      - { value: 'The cluster is re-initialized', correct: false }
+      - { value: 'Worker nodes are promoted automatically', correct: false }
+      - { value: 'Swarm shuts down all tasks', correct: false }
+      - { value: 'A new leader is elected and scheduling continues', correct: true }
     help: https://docs.docker.com/engine/swarm/admin_guide/
 
   - uuid: 0f9ae5e6-8990-4179-a847-b6a50b759e18
     question: Which of the following does Raft consensus in Swarm **not** handle?
     answers:
-      - { value: "Globally consistent object sequencing", correct: false }
-      - { value: "Leader election", correct: false }
-      - { value: "Cluster membership", correct: false }
-      - { value: "CPU resource limits", correct: true }
+      - { value: 'Globally consistent object sequencing', correct: false }
+      - { value: 'Leader election', correct: false }
+      - { value: 'Cluster membership', correct: false }
+      - { value: 'CPU resource limits', correct: true }
     help: https://docs.docker.com/engine/swarm/admin_guide/
 
   - uuid: 81b88aef-29c8-4be6-87c1-fc06b3c4a2f5
     question: What is the maximum number of manager failures tolerated in a 7-node Swarm manager cluster?
     answers:
-      - { value: "2", correct: false }
-      - { value: "4", correct: false }
-      - { value: "3", correct: true }
-      - { value: "5", correct: false }
+      - { value: '2', correct: false }
+      - { value: '4', correct: false }
+      - { value: '3', correct: true }
+      - { value: '5', correct: false }
     help: https://docs.docker.com/engine/swarm/admin_guide/
 
   - uuid: 937374e7-303a-4c79-a17d-b9a3f8ff37e1
     question: Why is it important not to have an even number of managers in a Swarm cluster?
     answers:
-      - { value: "An even number reduces the fault tolerance because quorum is always a majority", correct: true }
-      - { value: "Docker only supports odd numbers", correct: false }
-      - { value: "It affects networking performance", correct: false }
-      - { value: "Overlay networks require odd numbers", correct: false }
+      - { value: 'An even number reduces the fault tolerance because quorum is always a majority', correct: true }
+      - { value: 'Docker only supports odd numbers', correct: false }
+      - { value: 'It affects networking performance', correct: false }
+      - { value: 'Overlay networks require odd numbers', correct: false }
     help: https://docs.docker.com/engine/swarm/admin_guide/
diff --git a/data/1_Orchestration/extend_run_containers_to_services.yaml b/data/1_Orchestration/extend_run_containers_to_services.yaml
index cb79633..99b5a56 100644
--- a/data/1_Orchestration/extend_run_containers_to_services.yaml
+++ b/data/1_Orchestration/extend_run_containers_to_services.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: a1e6df9b-1307-41ad-84e1-6e1dc4d306fb
     question: What is the main difference between a container and a service in Docker?
     answers:
-      - { value: "Services can only run on Windows", correct: false }
-      - { value: "Containers require YAML configuration, services do not", correct: false }
-      - { value: "A container is a single instance, a service manages one or more replicas", correct: true }
-      - { value: "Containers are used only in Swarm mode", correct: false }
+      - { value: 'Services can only run on Windows', correct: false }
+      - { value: 'Containers require YAML configuration, services do not', correct: false }
+      - { value: 'A container is a single instance, a service manages one or more replicas', correct: true }
+      - { value: 'Containers are used only in Swarm mode', correct: false }
     help: 'https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/'
 
   - uuid: b01525b0-dfd8-48e1-9fd7-0b6fefb27cf2
     question: Which command converts a standalone container into a replicated service?
     answers:
-      - { value: "docker stack deploy", correct: false }
-      - { value: "docker container update", correct: false }
-      - { value: "docker service create", correct: true }
-      - { value: "docker swarm init", correct: false }
+      - { value: 'docker stack deploy', correct: false }
+      - { value: 'docker container update', correct: false }
+      - { value: 'docker service create', correct: true }
+      - { value: 'docker swarm init', correct: false }
     help: 'https://docs.docker.com/engine/reference/commandline/service_create/'
 
   - uuid: c321f8b2-b45b-4fa4-a61c-17e1d2b5d6a5
     question: Which option is used with 'docker service create' to specify the number of container replicas?
     answers:
-      - { value: "--count", correct: false }
-      - { value: "--instances", correct: false }
-      - { value: "--replicas", correct: true }
-      - { value: "--scale", correct: false }
+      - { value: '--count', correct: false }
+      - { value: '--instances', correct: false }
+      - { value: '--replicas', correct: true }
+      - { value: '--scale', correct: false }
     help: 'https://docs.docker.com/engine/reference/commandline/service_create/'
 
   - uuid: 0d9c4864-5c62-4b84-a3a3-0e78dd66d0f6
     question: What is a reason to prefer a service over a standalone container?
     answers:
-      - { value: "Only services support environment variables", correct: false }
-      - { value: "Containers require manual networking", correct: false }
-      - { value: "Containers can only run on a single host", correct: false }
-      - { value: "Services offer automatic recovery and rescheduling", correct: true }
+      - { value: 'Only services support environment variables', correct: false }
+      - { value: 'Containers require manual networking', correct: false }
+      - { value: 'Containers can only run on a single host', correct: false }
+      - { value: 'Services offer automatic recovery and rescheduling', correct: true }
     help: 'https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/'
 
   - uuid: ab9dc9e2-7df4-42b6-b09d-3188f52c3b3a
     question: Which command would you use to scale a service named 'web' to 4 replicas?
     answers:
-      - { value: "docker run --replicas 4 web", correct: false }
-      - { value: "docker service replicate web 4", correct: false }
-      - { value: "docker container scale web=4", correct: false }
-      - { value: "docker service scale web=4", correct: true }
+      - { value: 'docker run --replicas 4 web', correct: false }
+      - { value: 'docker service replicate web 4', correct: false }
+      - { value: 'docker container scale web=4', correct: false }
+      - { value: 'docker service scale web=4', correct: true }
     help: 'https://docs.docker.com/engine/reference/commandline/service_scale/'
 
   - uuid: 0b7266e1-b44e-41b3-b1b0-91a0e4ed0a7f
     question: What must be initialized before creating services in Swarm mode?
     answers:
-      - { value: "The swarm must be initialized with 'docker swarm init'", correct: true }
-      - { value: "A YAML file must be created", correct: false }
-      - { value: "Docker Content Trust must be disabled", correct: false }
-      - { value: "The image must be signed", correct: false }
+      - { value: 'The swarm must be initialized with `docker swarm init`', correct: true }
+      - { value: 'A YAML file must be created', correct: false }
+      - { value: 'Docker Content Trust must be disabled', correct: false }
+      - { value: 'The image must be signed', correct: false }
     help: 'https://docs.docker.com/engine/reference/commandline/swarm_init/'
 
   - uuid: 98030582-4b3e-4e89-9911-bfb9e25376e4
     question: Which of the following is true when comparing `docker run` and `docker service create`?
     answers:
-      - { value: "`docker run` starts a single container, `docker service create` can start multiple replicas", correct: true }
-      - { value: "`docker service create` supports interactive mode (-it)", correct: false }
-      - { value: "`docker service create` requires a YAML file", correct: false }
-      - { value: "`docker run` is only used for Windows containers", correct: false }
+      - { value: '`docker run` starts a single container, `docker service create` can start multiple replicas', correct: true }
+      - { value: '`docker service create` supports interactive mode (-it)', correct: false }
+      - { value: '`docker service create` requires a YAML file', correct: false }
+      - { value: '`docker run` is only used for Windows containers', correct: false }
     help: 'https://docs.docker.com/engine/swarm/services/'
 
   - uuid: ef7fd5a5-34f5-4eec-b255-5bb1b32c0626
     question: Why would you use a `docker-compose.yml` file with `docker stack deploy` instead of `docker service create`?
     answers:
-      - { value: "To manage multiple services and configuration in one file", correct: true }
-      - { value: "Because stacks run outside of Swarm mode", correct: false }
-      - { value: "Because it is required to publish ports", correct: false }
-      - { value: "Because `service create` does not support environment variables", correct: false }
+      - { value: 'To manage multiple services and configuration in one file', correct: true }
+      - { value: 'Because stacks run outside of Swarm mode', correct: false }
+      - { value: 'Because it is required to publish ports', correct: false }
+      - { value: 'Because `service create` does not support environment variables', correct: false }
     help: 'https://docs.docker.com/engine/reference/commandline/stack_deploy/'
 
   - uuid: d3fd9b08-74a5-4d8c-967e-c846be63edcf
     question: What happens if a container created with `docker run` crashes?
     answers:
-      - { value: "It automatically becomes a service", correct: false }
-      - { value: "The container will reboot the node", correct: false }
-      - { value: "Swarm will automatically reschedule it", correct: false }
-      - { value: "It must be restarted manually unless `--restart` is set", correct: true }
+      - { value: 'It automatically becomes a service', correct: false }
+      - { value: 'The container will reboot the node', correct: false }
+      - { value: 'Swarm will automatically reschedule it', correct: false }
+      - { value: 'It must be restarted manually unless `--restart` is set', correct: true }
     help: 'https://docs.docker.com/config/containers/start-containers-automatically/'
 
   - uuid: b95bb72f-54cf-4c3e-b3f5-bdff5f9b3790
     question: What happens when a task (container in a service) fails in Swarm mode?
     answers:
-      - { value: "The node is removed from the swarm", correct: false }
-      - { value: "The service must be restarted manually", correct: false }
-      - { value: "The service stops permanently", correct: false }
-      - { value: "Swarm automatically replaces the failed task", correct: true }
+      - { value: 'The node is removed from the swarm', correct: false }
+      - { value: 'The service must be restarted manually', correct: false }
+      - { value: 'The service stops permanently', correct: false }
+      - { value: 'Swarm automatically replaces the failed task', correct: true }
     help: 'https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/#replicated-and-global-services'
diff --git a/data/1_Orchestration/increase_the_number_of_replicas.yaml b/data/1_Orchestration/increase_the_number_of_replicas.yaml
index e9c31e0..b71a8ef 100644
--- a/data/1_Orchestration/increase_the_number_of_replicas.yaml
+++ b/data/1_Orchestration/increase_the_number_of_replicas.yaml
@@ -2,161 +2,161 @@ questions:
   - uuid: 1d1f5e1c-908a-4ad3-bc23-4d2eb4a9b101
     question: What is the purpose of increasing the number of replicas for a Docker Swarm service?
     answers:
-      - { value: "To enable IPv6 networking", correct: false }
-      - { value: "To mount more volumes into a container", correct: false }
-      - { value: "To increase the memory limit of a container", correct: false }
-      - { value: "To improve fault tolerance and load distribution", correct: true }
+      - { value: 'To enable IPv6 networking', correct: false }
+      - { value: 'To mount more volumes into a container', correct: false }
+      - { value: 'To increase the memory limit of a container', correct: false }
+      - { value: 'To improve fault tolerance and load distribution', correct: true }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/
 
   - uuid: 74c54825-263f-4c85-9e36-bd68e96c8b78
     question: Which command increases the number of replicas of an existing service in Docker Swarm?
     answers:
-      - { value: "docker service update --scale=5 myservice", correct: false }
-      - { value: "docker swarm scale myservice=5", correct: false }
-      - { value: "docker service scale myservice=5", correct: true }
-      - { value: "docker container update --replicas 5 myservice", correct: false }
+      - { value: 'docker service update --scale=5 myservice', correct: false }
+      - { value: 'docker swarm scale myservice=5', correct: false }
+      - { value: 'docker service scale myservice=5', correct: true }
+      - { value: 'docker container update --replicas 5 myservice', correct: false }
     help: https://docs.docker.com/reference/cli/docker/service/scale/
 
   - uuid: 3528e1be-d79f-4f82-b0a8-ff71f2d3c0d7
     question: What happens if a node running a service replica fails in Swarm mode?
     answers:
-      - { value: "The replica count decreases permanently", correct: false }
-      - { value: "Another node will automatically run a new replica to maintain the desired state", correct: true }
-      - { value: "The service enters maintenance mode", correct: false }
-      - { value: "The container is automatically restarted on the failed node", correct: false }
+      - { value: 'The replica count decreases permanently', correct: false }
+      - { value: 'Another node will automatically run a new replica to maintain the desired state', correct: true }
+      - { value: 'The service enters maintenance mode', correct: false }
+      - { value: 'The container is automatically restarted on the failed node', correct: false }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/
 
   - uuid: 13e68b20-8139-43b0-9a3b-958fa6c144db
     question: How can you verify that all replicas of a service are running as expected?
     answers:
-      - { value: "docker info replicas", correct: false }
-      - { value: "docker node inspect <service>", correct: false }
-      - { value: "docker service ps <service>", correct: true }
-      - { value: "docker ps --replica", correct: false }
+      - { value: 'docker info replicas', correct: false }
+      - { value: 'docker node inspect <service>', correct: false }
+      - { value: 'docker service ps <service>', correct: true }
+      - { value: 'docker ps --replica', correct: false }
     help: https://docs.docker.com/reference/cli/docker/service/ps/
 
   - uuid: 93333a3d-85cc-43b0-b0f0-93f51469f901
     question: When scaling a service to more replicas, what factor determines which node receives new tasks?
     answers:
-      - { value: "Manual assignment in the scale command", correct: false }
-      - { value: "The order in which containers were created", correct: false }
-      - { value: "The Swarm scheduler based on node availability and constraints", correct: true }
-      - { value: "The alphabetical order of node hostnames", correct: false }
+      - { value: 'Manual assignment in the scale command', correct: false }
+      - { value: 'The order in which containers were created', correct: false }
+      - { value: 'The Swarm scheduler based on node availability and constraints', correct: true }
+      - { value: 'The alphabetical order of node hostnames', correct: false }
     help: https://docs.docker.com/engine/swarm/services/
 
   - uuid: 4aaf4749-efb3-4e04-9e17-32d455a1bde7
     question: What happens if you scale a service beyond the total number of available nodes?
     answers:
-      - { value: "Swarm randomly kills existing tasks", correct: false }
-      - { value: "Some replicas remain in Pending state until nodes are available", correct: true }
-      - { value: "The command fails immediately", correct: false }
-      - { value: "Docker automatically provisions more nodes", correct: false }
+      - { value: 'Swarm randomly kills existing tasks', correct: false }
+      - { value: 'Some replicas remain in Pending state until nodes are available', correct: true }
+      - { value: 'The command fails immediately', correct: false }
+      - { value: 'Docker automatically provisions more nodes', correct: false }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/
 
   - uuid: 283add58-7c01-4a7e-9721-f6c832a17662
     question: Which of the following is a requirement to scale a service using `docker service scale`?
     answers:
-      - { value: "Swarm mode must be enabled", correct: true }
-      - { value: "The service must be in global mode", correct: false }
-      - { value: "A volume must be attached", correct: false }
-      - { value: "TLS authentication must be disabled", correct: false }
+      - { value: 'Swarm mode must be enabled', correct: true }
+      - { value: 'The service must be in global mode', correct: false }
+      - { value: 'A volume must be attached', correct: false }
+      - { value: 'TLS authentication must be disabled', correct: false }
     help: https://docs.docker.com/reference/cli/docker/service/scale/
 
   - uuid: ffd99d1f-0d80-4cfa-b305-8a151d278f91
     question: How do you scale a service named “webapp” to 10 replicas using the `docker service update` command?
     answers:
-      - { value: "docker update --replicas=10 webapp", correct: false }
-      - { value: "docker service scale webapp=10", correct: false }
-      - { value: "docker service update --replicas 10 webapp", correct: true }
-      - { value: "docker container scale webapp --replicas 10", correct: false }
+      - { value: 'docker update --replicas=10 webapp', correct: false }
+      - { value: 'docker service scale webapp=10', correct: false }
+      - { value: 'docker service update --replicas 10 webapp', correct: true }
+      - { value: 'docker container scale webapp --replicas 10', correct: false }
     help: https://docs.docker.com/reference/cli/docker/service/update/
 
   - uuid: 7f4b1b9e-d68d-4d95-83e0-92d785c418f4
     question: What is the default restart policy for a Swarm service replica?
     answers:
-      - { value: "always", correct: false }
-      - { value: "never", correct: false }
-      - { value: "restart-on-update", correct: false }
-      - { value: "restart on-failure", correct: true }
+      - { value: 'always', correct: false }
+      - { value: 'never', correct: false }
+      - { value: 'restart-on-update', correct: false }
+      - { value: 'restart on-failure', correct: true }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/
 
   - uuid: 9f58e066-2e38-49d3-8f89-8b8379e845f2
     question: What command can show you how many replicas are running and desired?
     answers:
-      - { value: "docker ps --services", correct: false }
-      - { value: "docker info --services", correct: false }
-      - { value: "docker node ps", correct: false }
-      - { value: "docker service ls", correct: true }
+      - { value: 'docker ps --services', correct: false }
+      - { value: 'docker info --services', correct: false }
+      - { value: 'docker node ps', correct: false }
+      - { value: 'docker service ls', correct: true }
     help: https://docs.docker.com/reference/cli/docker/service/ls/
 
   - uuid: 5e0a6d9b-13ad-4d96-9e4c-bb28e1344db0
     question: Which of these is a key reason to scale services horizontally in Docker Swarm?
     answers:
-      - { value: "To handle increased application load by distributing across replicas", correct: true }
-      - { value: "To convert a service into a privileged container", correct: false }
-      - { value: "To switch a container from bridge to host network", correct: false }
-      - { value: "To enable multi-stage builds in a container", correct: false }
+      - { value: 'To handle increased application load by distributing across replicas', correct: true }
+      - { value: 'To convert a service into a privileged container', correct: false }
+      - { value: 'To switch a container from bridge to host network', correct: false }
+      - { value: 'To enable multi-stage builds in a container', correct: false }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/
 
   - uuid: 872ab1a5-d8eb-4bce-ae80-90bb99e6c5be
     question: What limitation applies when increasing replicas of a service that uses local volume storage?
     answers:
-      - { value: "The replicas cannot use Docker secrets", correct: false }
-      - { value: "Data may not be shared between replicas on different nodes", correct: true }
-      - { value: "Swarm disables automatic scaling", correct: false }
-      - { value: "The service must be recreated from scratch", correct: false }
+      - { value: 'The replicas cannot use Docker secrets', correct: false }
+      - { value: 'Data may not be shared between replicas on different nodes', correct: true }
+      - { value: 'Swarm disables automatic scaling', correct: false }
+      - { value: 'The service must be recreated from scratch', correct: false }
     help: https://docs.docker.com/storage/volumes/
 
   - uuid: 9eb47370-3621-498b-8c3d-ea19c8f64e00
     question: How can you limit which nodes replicas of a service are deployed to?
     answers:
-      - { value: "By setting node CPU quotas", correct: false }
-      - { value: "By adding replica affinity", correct: false }
-      - { value: "By using placement constraints", correct: true }
-      - { value: "By labeling containers", correct: false }
+      - { value: 'By setting node CPU quotas', correct: false }
+      - { value: 'By adding replica affinity', correct: false }
+      - { value: 'By using placement constraints', correct: true }
+      - { value: 'By labeling containers', correct: false }
     help: https://docs.docker.com/engine/swarm/services/#placement-constraints
 
   - uuid: f9e45a08-6c3c-49a0-90c6-d81d6f86e926
     question: What happens if you try to scale a service that was created in global mode?
     answers:
-      - { value: "Swarm automatically increases CPU quotas", correct: false }
-      - { value: "Nothing happens — replicas remain unchanged", correct: false }
-      - { value: "Docker converts the service to replicated mode", correct: false }
-      - { value: "The scale operation fails with an error", correct: true }
+      - { value: 'Swarm automatically increases CPU quotas', correct: false }
+      - { value: 'Nothing happens — replicas remain unchanged', correct: false }
+      - { value: 'Docker converts the service to replicated mode', correct: false }
+      - { value: 'The scale operation fails with an error', correct: true }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/
 
   - uuid: 12c94943-b201-4987-826a-7161b54ce36f
     question: What flag in `docker service create` sets the number of replicas?
     answers:
-      - { value: "--instances", correct: false }
-      - { value: "--tasks", correct: false }
-      - { value: "--replicas", correct: true }
-      - { value: "--scale", correct: false }
+      - { value: '--instances', correct: false }
+      - { value: '--tasks', correct: false }
+      - { value: '--replicas', correct: true }
+      - { value: '--scale', correct: false }
     help: https://docs.docker.com/reference/cli/docker/service/create/
 
   - uuid: d5e30c33-bc69-44ea-bb8c-37779c2c1a5e
     question: How can you scale a service temporarily for testing purposes?
     answers:
-      - { value: "Set replicas in docker-compose.yaml and restart", correct: false }
-      - { value: "Run docker container update with a TTL", correct: false }
-      - { value: "Use docker service scale and then scale it back manually", correct: true }
-      - { value: "Use docker run --replica-count", correct: false }
+      - { value: 'Set replicas in docker-compose.yaml and restart', correct: false }
+      - { value: 'Run docker container update with a TTL', correct: false }
+      - { value: 'Use docker service scale and then scale it back manually', correct: true }
+      - { value: 'Use docker run --replica-count', correct: false }
     help: https://docs.docker.com/reference/cli/docker/service/scale/
 
   - uuid: a17fa2eb-9b92-446f-8771-2dbe4a76b55c
     question: What mechanism ensures that the number of replicas stays consistent in Docker Swarm?
     answers:
-      - { value: "Swarm’s desired state reconciliation loop", correct: true }
-      - { value: "Kubernetes controller manager", correct: false }
-      - { value: "Eventual consistency daemon", correct: false }
-      - { value: "Health check interval enforcement", correct: false }
+      - { value: 'Swarm’s desired state reconciliation loop', correct: true }
+      - { value: 'Kubernetes controller manager', correct: false }
+      - { value: 'Eventual consistency daemon', correct: false }
+      - { value: 'Health check interval enforcement', correct: false }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/
 
   - uuid: 351184f6-3e87-4c76-b0f3-944f478b2617
     question: Which Docker command would *not* work outside Swarm mode to scale replicas?
     answers:
-      - { value: "docker run --replica-count", correct: false }
-      - { value: "docker compose up --scale", correct: false }
-      - { value: "docker service scale", correct: true }
-      - { value: "docker container run --replicas", correct: false }
+      - { value: 'docker run --replica-count', correct: false }
+      - { value: 'docker compose up --scale', correct: false }
+      - { value: 'docker service scale', correct: true }
+      - { value: 'docker container run --replicas', correct: false }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/
diff --git a/data/1_Orchestration/interpret_output_docker_inspect_commend.yaml b/data/1_Orchestration/interpret_output_docker_inspect_commend.yaml
index f897bfd..272e2be 100644
--- a/data/1_Orchestration/interpret_output_docker_inspect_commend.yaml
+++ b/data/1_Orchestration/interpret_output_docker_inspect_commend.yaml
@@ -2,179 +2,179 @@ questions:
   - uuid: 36fdf2a4-5d6f-4c63-b12e-9ff54b84f021
     question: What information can be retrieved using the command “docker inspect <container>”?
     answers:
-      - { value: "A summary of Docker system resource usage", correct: false }
-      - { value: "Container logs in real time", correct: false }
-      - { value: "All running containers grouped by image", correct: false }
-      - { value: "Low-level details such as network settings, volumes, environment variables, and process ID", correct: true }
+      - { value: 'A summary of Docker system resource usage', correct: false }
+      - { value: 'Container logs in real time', correct: false }
+      - { value: 'All running containers grouped by image', correct: false }
+      - { value: 'Low-level details such as network settings, volumes, environment variables, and process ID', correct: true }
     help: https://docs.docker.com/reference/cli/docker/inspect/
 
   - uuid: 9e05fa39-6be3-4b4e-a054-3cc2344e1f9b
     question: What type of data is returned by “docker inspect” by default?
     answers:
-      - { value: "Binary-encoded runtime state", correct: false }
-      - { value: "Raw JSON objects describing the container or image", correct: true }
-      - { value: "Formatted logs with timestamps", correct: false }
-      - { value: "Human-readable summary tables", correct: false }
+      - { value: 'Binary-encoded runtime state', correct: false }
+      - { value: 'Raw JSON objects describing the container or image', correct: true }
+      - { value: 'Formatted logs with timestamps', correct: false }
+      - { value: 'Human-readable summary tables', correct: false }
     help: https://docs.docker.com/reference/cli/docker/inspect/
 
   - uuid: 5f2b3e77-b221-4cb8-a405-3aeb8a947d30
     question: Which docker inspect property shows whether a container has mounted volumes?
     answers:
-      - { value: ".Mounts", correct: true }
-      - { value: ".Binds", correct: false }
-      - { value: ".Volumes", correct: false }
-      - { value: ".Layers", correct: false }
+      - { value: '.Mounts', correct: true }
+      - { value: '.Binds', correct: false }
+      - { value: '.Volumes', correct: false }
+      - { value: '.Layers', correct: false }
     help: https://docs.docker.com/engine/api/v1.43/#operation/ContainerInspect
 
   - uuid: 49de41e1-f72d-46ee-bfe7-6e448f6f827d
     question: Which field in “docker inspect” output tells whether a container was started with a TTY allocated?
     answers:
-      - { value: ".State.Terminal", correct: false }
-      - { value: ".HostConfig.TtyEnabled", correct: false }
-      - { value: ".Flags.tty", correct: false }
-      - { value: ".Config.Tty", correct: true }
+      - { value: '.State.Terminal', correct: false }
+      - { value: '.HostConfig.TtyEnabled', correct: false }
+      - { value: '.Flags.tty', correct: false }
+      - { value: '.Config.Tty', correct: true }
     help: https://docs.docker.com/reference/cli/docker/inspect/
 
   - uuid: 5ac5561d-0802-4fc2-88d7-bec37cb8a4df
     question: How can you filter `docker inspect` output to only display the IP address of a container?
     answers:
-      - { value: "docker inspect --ip-only <container>", correct: false }
-      - { value: "docker info --network <container>", correct: false }
-      - { value: "docker logs --network-info <container>", correct: false }
-      - { value: "docker inspect -f '{{ .NetworkSettings.IPAddress }}' <container>", correct: true }
+      - { value: 'docker inspect --ip-only <container>', correct: false }
+      - { value: 'docker info --network <container>', correct: false }
+      - { value: 'docker logs --network-info <container>', correct: false }
+      - { value: 'docker inspect -f `{{ .NetworkSettings.IPAddress }}` <container>', correct: true }
     help: https://docs.docker.com/reference/cli/docker/inspect/
 
   - uuid: 5e7f3841-bd3f-4e3e-b63b-73f4b7b9482e
     question: How can you display the container's MAC address using 'docker inspect'?
     answers:
-      - { value: "Using the format `{{.MAC}}`", correct: false }
-      - { value: "Using the format `{{range .NetworkSettings.Networks}}{{.MacAddress}}{{end}}`", correct: true }
-      - { value: "Using the format `{{.Network.Mac}}`", correct: false }
-      - { value: "docker inspect --mac", correct: false }
+      - { value: 'Using the format `{{.MAC}}`', correct: false }
+      - { value: 'Using the format `{{range .NetworkSettings.Networks}}{{.MacAddress}}{{end}}`', correct: true }
+      - { value: 'Using the format `{{.Network.Mac}}`', correct: false }
+      - { value: 'docker inspect --mac', correct: false }
     help: https://docs.docker.com/reference/cli/docker/inspect/#get-an-instances-mac-address
 
   - uuid: 292be32d-6601-4b64-889a-78ed87a6d593
     question: Which field reveals the container's log file location?
     answers:
-      - { value: "LogFile", correct: false }
-      - { value: "LogPath", correct: true }
-      - { value: "ContainerLog", correct: false }
-      - { value: "LoggingPath", correct: false }
+      - { value: 'LogFile', correct: false }
+      - { value: 'LogPath', correct: true }
+      - { value: 'ContainerLog', correct: false }
+      - { value: 'LoggingPath', correct: false }
     help: https://docs.docker.com/reference/cli/docker/inspect/#get-an-instances-log-path
 
   - uuid: 71ae206c-7b39-4b37-97f4-b597310d0b2c
     question: How do you retrieve the image name used by a container?
     answers:
-      - { value: "Using the field .Config.Image", correct: true }
-      - { value: "From .Metadata.Image", correct: false }
-      - { value: "Using the field .Image.Name", correct: false }
-      - { value: "With `docker image inspect`", correct: false }
+      - { value: 'Using the field .Config.Image', correct: true }
+      - { value: 'From .Metadata.Image', correct: false }
+      - { value: 'Using the field .Image.Name', correct: false }
+      - { value: 'With `docker image inspect`', correct: false }
     help: https://docs.docker.com/reference/cli/docker/inspect/#get-an-instances-image-name
 
   - uuid: 9db23e15-e12d-49f8-a429-dfcbd9f9b8f5
     question: What does the 'SizeRw' field represent in a container's inspect output?
     answers:
-      - { value: "The total size of all image layers", correct: false }
-      - { value: "The root filesystem size", correct: false }
-      - { value: "The memory consumed by the container", correct: false }
-      - { value: "The size of the writable layer compared to the image", correct: true }
+      - { value: 'The total size of all image layers', correct: false }
+      - { value: 'The root filesystem size', correct: false }
+      - { value: 'The memory consumed by the container', correct: false }
+      - { value: 'The size of the writable layer compared to the image', correct: true }
     help: https://docs.docker.com/reference/cli/docker/inspect/#inspect-the-size-of-a-container
 
   - uuid: 6afcb090-45c7-45ef-9817-f1049d6536b0
     question: Which command shows volume details specifically?
     answers:
-      - { value: "docker volume inspect --details", correct: false }
-      - { value: "docker info --volumes", correct: false }
-      - { value: "docker inspect myvolume --only-volume", correct: false }
-      - { value: "docker inspect --type=volume myvolume", correct: true }
+      - { value: 'docker volume inspect --details', correct: false }
+      - { value: 'docker info --volumes', correct: false }
+      - { value: 'docker inspect myvolume --only-volume', correct: false }
+      - { value: 'docker inspect --type=volume myvolume', correct: true }
     help: https://docs.docker.com/reference/cli/docker/inspect/#specify-target-type---type
 
   - uuid: 6ad0d3f8-0834-4011-a942-9be3d30fc17a
     question: What is the result of using the '--type' flag incorrectly?
     answers:
-      - { value: "It crashes the Docker daemon", correct: false }
-      - { value: "It lists only containers", correct: false }
-      - { value: "The command may return ambiguous or incorrect results", correct: true }
-      - { value: "It disables network inspection", correct: false }
+      - { value: 'It crashes the Docker daemon', correct: false }
+      - { value: 'It lists only containers', correct: false }
+      - { value: 'The command may return ambiguous or incorrect results', correct: true }
+      - { value: 'It disables network inspection', correct: false }
     help: https://docs.docker.com/reference/cli/docker/inspect/#specify-target-type---type
 
   - uuid: d50e1c3d-1f36-4b7b-a8ae-94f00ef1168f
     question: What happens if you inspect multiple objects at once?
     answers:
-      - { value: "Only container types are shown", correct: false }
-      - { value: "Only the first object is returned", correct: false }
-      - { value: "The output is an array of results", correct: true }
-      - { value: "Docker throws an error", correct: false }
+      - { value: 'Only container types are shown', correct: false }
+      - { value: 'Only the first object is returned', correct: false }
+      - { value: 'The output is an array of results', correct: true }
+      - { value: 'Docker throws an error', correct: false }
     help: https://docs.docker.com/reference/cli/docker/inspect/
 
   - uuid: 3f0b5099-9cc6-4144-bb5f-82064c5e373b
     question: What does 'SizeRootFs' represent in inspect output?
     answers:
-      - { value: "Total size of the container’s filesystem", correct: true }
-      - { value: "The combined memory and disk usage", correct: false }
-      - { value: "Only the changed files", correct: false }
-      - { value: "The base image size", correct: false }
+      - { value: 'Total size of the container’s filesystem', correct: true }
+      - { value: 'The combined memory and disk usage', correct: false }
+      - { value: 'Only the changed files', correct: false }
+      - { value: 'The base image size', correct: false }
     help: https://docs.docker.com/reference/cli/docker/inspect/#inspect-the-size-of-a-container
 
   - uuid: 7827e2be-77e1-4380-a173-9f64dba7c5d9
     question: How do you list all port bindings using 'docker inspect'?
     answers:
-      - { value: "With `--list-ports`", correct: false }
-      - { value: "Using `{{.PortMap}}`", correct: false }
-      - { value: "Via docker network inspect", correct: false }
-      - { value: "Using `{{range $p, $conf := .NetworkSettings.Ports}} {{$p}} -> {{(index $conf 0).HostPort}} {{end}}`", correct: true }
+      - { value: 'With `--list-ports`', correct: false }
+      - { value: 'Using `{{.PortMap}}`', correct: false }
+      - { value: 'Via docker network inspect', correct: false }
+      - { value: 'Using `{{range $p, $conf := .NetworkSettings.Ports}} {{$p}} -> {{(index $conf 0).HostPort}} {{end}}`', correct: true }
     help: https://docs.docker.com/reference/cli/docker/inspect/#list-all-port-bindings
 
   - uuid: d7c4dcd3-2542-4e5e-a0cf-01fd640fa73f
     question: Can 'docker inspect' be used on stopped containers?
     answers:
-      - { value: "No, only running containers are supported", correct: false }
-      - { value: "It returns null data for stopped containers", correct: false }
-      - { value: "Only images can be inspected", correct: false }
-      - { value: "Yes, it works on both running and stopped containers", correct: true }
+      - { value: 'No, only running containers are supported', correct: false }
+      - { value: 'It returns null data for stopped containers', correct: false }
+      - { value: 'Only images can be inspected', correct: false }
+      - { value: 'Yes, it works on both running and stopped containers', correct: true }
     help: https://docs.docker.com/reference/cli/docker/inspect/
 
   - uuid: b0e1a41f-b260-4090-91e4-9df6f1909c83
     question: What does the --size flag add to the output of 'docker inspect'?
     answers:
-      - { value: "It enables verbose logging output", correct: false }
-      - { value: "It includes SizeRootFs and SizeRw fields for containers", correct: true }
-      - { value: "It shows the image size in MB", correct: false }
-      - { value: "It adds memory and CPU usage statistics", correct: false }
+      - { value: 'It enables verbose logging output', correct: false }
+      - { value: 'It includes SizeRootFs and SizeRw fields for containers', correct: true }
+      - { value: 'It shows the image size in MB', correct: false }
+      - { value: 'It adds memory and CPU usage statistics', correct: false }
     help: https://docs.docker.com/reference/cli/docker/inspect/#inspect-the-size-of-a-container
 
   - uuid: f08b0930-7c4f-43a6-85b0-312ef6b7e8cc
     question: Which inspect field tells you if a container is currently running?
     answers:
-      - { value: ".State.Running", correct: true }
-      - { value: ".Status", correct: false }
-      - { value: ".HostConfig.State", correct: false }
-      - { value: ".Active", correct: false }
+      - { value: '.State.Running', correct: true }
+      - { value: '.Status', correct: false }
+      - { value: '.HostConfig.State', correct: false }
+      - { value: '.Active', correct: false }
     help: https://docs.docker.com/engine/api/v1.43/#tag/Container/operation/ContainerInspect
 
   - uuid: 11a5b2f3-fd1a-43d5-9a1e-d9c8a6098f14
     question: What does an ExitCode of 137 typically indicate in 'docker inspect'?
     answers:
-      - { value: "The container was paused", correct: false }
-      - { value: "The container was killed by the system (e.g., out-of-memory)", correct: true }
-      - { value: "The container exited normally", correct: false }
-      - { value: "The container is still running", correct: false }
+      - { value: 'The container was paused', correct: false }
+      - { value: 'The container was killed by the system (e.g., out-of-memory)', correct: true }
+      - { value: 'The container exited normally', correct: false }
+      - { value: 'The container is still running', correct: false }
     help: https://docs.docker.com/engine/reference/run/#exit-status
 
   - uuid: e01bb0a4-3d67-4d6c-bb71-18981db6f3a5
     question: What is the effect of using '{{json .Config}}' with docker inspect --format?
     answers:
-      - { value: "It disables structured output", correct: false }
-      - { value: "It renders the Config object in JSON format", correct: true }
-      - { value: "It converts all fields to base64", correct: false }
-      - { value: "It filters only the container ID", correct: false }
+      - { value: 'It disables structured output', correct: false }
+      - { value: 'It renders the Config object in JSON format', correct: true }
+      - { value: 'It converts all fields to base64', correct: false }
+      - { value: 'It filters only the container ID', correct: false }
     help: https://docs.docker.com/reference/cli/docker/inspect/#get-a-subsection-in-json-format
 
   - uuid: 4b758c3e-2b67-4fa4-8db4-8e2e45c220d7
     question: Why would you use the --type flag with docker inspect?
     answers:
-      - { value: "To limit the inspect result to container IDs only", correct: false }
-      - { value: "To disambiguate between objects with the same name", correct: true }
-      - { value: "To trigger recursive inspection", correct: false }
-      - { value: "To enable secure inspect mode", correct: false }
+      - { value: 'To limit the inspect result to container IDs only', correct: false }
+      - { value: 'To disambiguate between objects with the same name', correct: true }
+      - { value: 'To trigger recursive inspection', correct: false }
+      - { value: 'To enable secure inspect mode', correct: false }
     help: https://docs.docker.com/reference/cli/docker/inspect/#specify-target-type---type
diff --git a/data/1_Orchestration/k8s_configmap_secret.yaml b/data/1_Orchestration/k8s_configmap_secret.yaml
index 8862693..8049a14 100644
--- a/data/1_Orchestration/k8s_configmap_secret.yaml
+++ b/data/1_Orchestration/k8s_configmap_secret.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: 1d7ea4ae-d13b-41e1-a7b0-e7710cf22982
     question: What is the purpose of a ConfigMap in Kubernetes?
     answers:
-      - { value: "To manage user permissions", correct: false }
-      - { value: "To define security policies", correct: false }
-      - { value: "To provide configuration data as key-value pairs to Pods", correct: true }
-      - { value: "To store container logs", correct: false }
+      - { value: 'To manage user permissions', correct: false }
+      - { value: 'To define security policies', correct: false }
+      - { value: 'To provide configuration data as key-value pairs to Pods', correct: true }
+      - { value: 'To store container logs', correct: false }
     help: https://kubernetes.io/docs/concepts/configuration/configmap/
 
   - uuid: b4b776f4-cd20-4f59-a9bb-2f98ee0e40fa
     question: What is the key difference between a ConfigMap and a Secret in Kubernetes?
     answers:
-      - { value: "Secrets can only be used with StatefulSets", correct: false }
-      - { value: "Secrets are base64-encoded and used for sensitive data", correct: true }
-      - { value: "ConfigMaps are encrypted by default", correct: false }
-      - { value: "Secrets cannot be mounted into Pods", correct: false }
+      - { value: 'Secrets can only be used with StatefulSets', correct: false }
+      - { value: 'Secrets are base64-encoded and used for sensitive data', correct: true }
+      - { value: 'ConfigMaps are encrypted by default', correct: false }
+      - { value: 'Secrets cannot be mounted into Pods', correct: false }
     help: https://kubernetes.io/docs/concepts/configuration/secret/
 
   - uuid: a5c85058-e6c9-4ff8-96e0-40e8c6c6a561
     question: How can a ConfigMap be used inside a Pod?
     answers:
-      - { value: "Only in init containers", correct: false }
-      - { value: "As environment variables or mounted as files", correct: true }
-      - { value: "As part of the container image", correct: false }
-      - { value: "By injecting them into kube-proxy", correct: false }
+      - { value: 'Only in init containers', correct: false }
+      - { value: 'As environment variables or mounted as files', correct: true }
+      - { value: 'As part of the container image', correct: false }
+      - { value: 'By injecting them into kube-proxy', correct: false }
     help: https://kubernetes.io/docs/tasks/configure-pod-container/configure-pod-configmap/
 
   - uuid: 316db2d0-c5e1-4eb6-98be-77c0866e6166
     question: What must be done before referencing a ConfigMap in a Pod?
     answers:
-      - { value: "It must be encoded in base64", correct: false }
-      - { value: "It must be imported from a Helm chart", correct: false }
-      - { value: "The ConfigMap must exist in the same namespace", correct: true }
-      - { value: "It must be mounted to the kubelet", correct: false }
+      - { value: 'It must be encoded in base64', correct: false }
+      - { value: 'It must be imported from a Helm chart', correct: false }
+      - { value: 'The ConfigMap must exist in the same namespace', correct: true }
+      - { value: 'It must be mounted to the kubelet', correct: false }
     help: https://kubernetes.io/docs/tasks/configure-pod-container/configure-pod-configmap/
 
   - uuid: fcb7b2e6-5584-4f34-8755-58900169f169
     question: Which of the following is true about Secrets in Kubernetes?
     answers:
-      - { value: "They are encrypted with TLS by default", correct: false }
-      - { value: "They are stored in etcd as plaintext", correct: false }
-      - { value: "They can only be accessed via the API", correct: false }
-      - { value: "They can be mounted as volumes into containers", correct: true }
+      - { value: 'They are encrypted with TLS by default', correct: false }
+      - { value: 'They are stored in etcd as plaintext', correct: false }
+      - { value: 'They can only be accessed via the API', correct: false }
+      - { value: 'They can be mounted as volumes into containers', correct: true }
     help: https://kubernetes.io/docs/concepts/configuration/secret/
 
   - uuid: 82184f47-6502-46ea-8d97-cc7e23acb4bb
     question: How do you expose a key from a ConfigMap as an environment variable?
     answers:
-      - { value: "Use envFrom or env in the container spec", correct: true }
-      - { value: "Use 'volumesFrom'", correct: false }
-      - { value: "Reference the ConfigMap in a PVC", correct: false }
-      - { value: "Use 'args' in the container spec", correct: false }
+      - { value: 'Use envFrom or env in the container spec', correct: true }
+      - { value: 'Use volumesFrom', correct: false }
+      - { value: 'Reference the ConfigMap in a PVC', correct: false }
+      - { value: 'Use args in the container spec', correct: false }
     help: https://kubernetes.io/docs/tasks/configure-pod-container/configure-pod-configmap/
 
   - uuid: b243f486-c775-4b59-b52f-26e9ae5a64b0
     question: What should you do to prevent secrets from being visible in environment variables?
     answers:
-      - { value: "Mount the secret as a volume instead", correct: true }
-      - { value: "Disable the container’s shell access", correct: false }
-      - { value: "Use initContainers to obfuscate secrets", correct: false }
-      - { value: "Run containers with non-root user", correct: false }
+      - { value: 'Mount the secret as a volume instead', correct: true }
+      - { value: 'Disable the container’s shell access', correct: false }
+      - { value: 'Use initContainers to obfuscate secrets', correct: false }
+      - { value: 'Run containers with non-root user', correct: false }
     help: https://kubernetes.io/docs/concepts/configuration/secret/#using-secrets-as-files-from-a-pod
 
   - uuid: 7d847e10-5037-41dc-beb3-96f72862a172
     question: Where are Kubernetes Secrets stored by default?
     answers:
-      - { value: "In etcd", correct: true }
-      - { value: "In kubelet memory", correct: false }
-      - { value: "In the container filesystem", correct: false }
-      - { value: "In Docker volumes", correct: false }
+      - { value: 'In etcd', correct: true }
+      - { value: 'In kubelet memory', correct: false }
+      - { value: 'In the container filesystem', correct: false }
+      - { value: 'In Docker volumes', correct: false }
     help: https://kubernetes.io/docs/concepts/configuration/secret/#security-properties
 
   - uuid: af9619a7-f9b9-4a96-814f-6d23480fe312
     question: Which Kubernetes field is used to mount a Secret as a volume?
     answers:
-      - { value: "env.secret", correct: false }
-      - { value: "spec.secretName", correct: false }
-      - { value: "volumes.secret.secretName", correct: true }
-      - { value: "args.secretFile", correct: false }
+      - { value: 'env.secret', correct: false }
+      - { value: 'spec.secretName', correct: false }
+      - { value: 'volumes.secret.secretName', correct: true }
+      - { value: 'args.secretFile', correct: false }
     help: https://kubernetes.io/docs/concepts/configuration/secret/#using-secrets-as-files-from-a-pod
 
   - uuid: 01f4a764-9a5c-4b77-b204-ef3e94b6b91a
     question: How can a ConfigMap or Secret be updated without restarting the Pod?
     answers:
-      - { value: "It’s not possible", correct: false }
-      - { value: "Use projected volumes with subPath disabled", correct: true }
-      - { value: "Update the image and re-deploy", correct: false }
-      - { value: "Use ephemeral containers", correct: false }
+      - { value: 'It’s not possible', correct: false }
+      - { value: 'Use projected volumes with subPath disabled', correct: true }
+      - { value: 'Update the image and re-deploy', correct: false }
+      - { value: 'Use ephemeral containers', correct: false }
     help: https://kubernetes.io/docs/concepts/configuration/configmap/#mounted-configmaps-are-updated-automatically
diff --git a/data/1_Orchestration/k8s_pods_deployments.yaml b/data/1_Orchestration/k8s_pods_deployments.yaml
index e74ec7e..7e75fb1 100644
--- a/data/1_Orchestration/k8s_pods_deployments.yaml
+++ b/data/1_Orchestration/k8s_pods_deployments.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: d0d87db1-2fe0-426c-a49f-0c2c60c472b1
     question: What is the minimum required field in a Kubernetes Pod manifest?
     answers:
-      - { value: "labels", correct: false }
-      - { value: "spec", correct: true }
-      - { value: "containers", correct: false }
-      - { value: "metadata", correct: false }
+      - { value: 'labels', correct: false }
+      - { value: 'spec', correct: true }
+      - { value: 'containers', correct: false }
+      - { value: 'metadata', correct: false }
     help: https://kubernetes.io/docs/concepts/workloads/pods/
 
   - uuid: a99b73b1-09d1-4cb6-b3a0-593a2910a789
     question: Which object in Kubernetes is used to manage the lifecycle and scaling of Pods?
     answers:
-      - { value: "Service", correct: false }
-      - { value: "ReplicaSet", correct: false }
-      - { value: "Pod", correct: false }
-      - { value: "Deployment", correct: true }
+      - { value: 'Service', correct: false }
+      - { value: 'ReplicaSet', correct: false }
+      - { value: 'Pod', correct: false }
+      - { value: 'Deployment', correct: true }
     help: https://kubernetes.io/docs/concepts/workloads/controllers/deployment/
 
   - uuid: f7d8e74e-47e4-48aa-bf17-f20be1f3a9c0
     question: What is the primary benefit of using a Deployment instead of a standalone Pod?
     answers:
-      - { value: "Automatic rollout and scaling", correct: true }
-      - { value: "Simplified volume configuration", correct: false }
-      - { value: "Faster startup", correct: false }
-      - { value: "Pod affinity rules", correct: false }
+      - { value: 'Automatic rollout and scaling', correct: true }
+      - { value: 'Simplified volume configuration', correct: false }
+      - { value: 'Faster startup', correct: false }
+      - { value: 'Pod affinity rules', correct: false }
     help: https://kubernetes.io/docs/concepts/workloads/controllers/deployment/
 
   - uuid: 3596ef84-30ef-4cf1-8362-79cba4ee9fd5
     question: What command creates a Deployment from a container image?
     answers:
-      - { value: "kubectl run pod nginx", correct: false }
-      - { value: "kubectl deploy image nginx", correct: false }
-      - { value: "kubectl create deployment myapp --image=nginx", correct: true }
-      - { value: "kubectl apply -f pod.yaml", correct: false }
+      - { value: 'kubectl run pod nginx', correct: false }
+      - { value: 'kubectl deploy image nginx', correct: false }
+      - { value: 'kubectl create deployment myapp --image=nginx', correct: true }
+      - { value: 'kubectl apply -f pod.yaml', correct: false }
     help: https://kubernetes.io/docs/reference/generated/kubectl/kubectl-commands#create
 
   - uuid: 9f52d7fb-17d9-4ab1-b9b6-6dd5f41e0f0e
     question: Which Kubernetes resource ensures a specified number of Pods are always running?
     answers:
-      - { value: "ConfigMap", correct: false }
-      - { value: "Secret", correct: false }
-      - { value: "Deployment", correct: true }
-      - { value: "Service", correct: false }
+      - { value: 'ConfigMap', correct: false }
+      - { value: 'Secret', correct: false }
+      - { value: 'Deployment', correct: true }
+      - { value: 'Service', correct: false }
     help: https://kubernetes.io/docs/concepts/workloads/controllers/deployment/
 
   - uuid: b8e3c3a2-77a4-4d90-bd1f-1eab94f377c1
     question: How can you declaratively deploy a Pod in Kubernetes?
     answers:
-      - { value: "Using a YAML manifest with 'kubectl apply -f'", correct: true }
-      - { value: "Using Docker Compose", correct: false }
-      - { value: "Using 'kubectl exec'", correct: false }
-      - { value: "Using docker run", correct: false }
+      - { value: 'Using a YAML manifest with `kubectl apply -f`', correct: true }
+      - { value: 'Using Docker Compose', correct: false }
+      - { value: 'Using `kubectl exec`', correct: false }
+      - { value: 'Using docker run', correct: false }
     help: https://kubernetes.io/docs/tasks/run-application/run-single-instance-stateful-application/
 
   - uuid: 5bb4c3dc-9428-4938-8c3e-9e0ee1e4200f
     question: Which field in a Deployment manifest specifies the container image to run?
     answers:
-      - { value: "spec.selector.image", correct: false }
-      - { value: "spec.template.spec.containers.image", correct: true }
-      - { value: "metadata.image", correct: false }
-      - { value: "spec.imagePullPolicy", correct: false }
+      - { value: 'spec.selector.image', correct: false }
+      - { value: 'spec.template.spec.containers.image', correct: true }
+      - { value: 'metadata.image', correct: false }
+      - { value: 'spec.imagePullPolicy', correct: false }
     help: https://kubernetes.io/docs/concepts/workloads/controllers/deployment/
 
   - uuid: 4cd9971a-932f-4e12-94e9-832e33e19d10
     question: What happens when you change the image in a Deployment spec and reapply the manifest?
     answers:
-      - { value: "The deployment fails", correct: false }
-      - { value: "All Pods are stopped and restarted at once", correct: false }
-      - { value: "Nothing happens", correct: false }
-      - { value: "Kubernetes performs a rolling update of the Pods", correct: true }
+      - { value: 'The deployment fails', correct: false }
+      - { value: 'All Pods are stopped and restarted at once', correct: false }
+      - { value: 'Nothing happens', correct: false }
+      - { value: 'Kubernetes performs a rolling update of the Pods', correct: true }
     help: https://kubernetes.io/docs/concepts/workloads/controllers/deployment/#updating-a-deployment
 
   - uuid: 4abf4c56-d6ea-48c2-beb3-b29d486b1e7e
     question: Which field in a Deployment manifest allows you to set the number of Pods?
     answers:
-      - { value: "spec.count", correct: false }
-      - { value: "metadata.replicas", correct: false }
-      - { value: "containers.replicas", correct: false }
-      - { value: "spec.replicas", correct: true }
+      - { value: 'spec.count', correct: false }
+      - { value: 'metadata.replicas', correct: false }
+      - { value: 'containers.replicas', correct: false }
+      - { value: 'spec.replicas', correct: true }
     help: https://kubernetes.io/docs/concepts/workloads/controllers/deployment/
 
   - uuid: 9e922c82-f3f3-499b-9cc5-8a4f21e9c3b9
     question: How do you expose a Deployment so it can be accessed outside the cluster?
     answers:
-      - { value: "Add port mapping in the deployment manifest", correct: false }
-      - { value: "Use pod-level IP forwarding", correct: false }
-      - { value: "Create a Service of type NodePort or LoadBalancer", correct: true }
-      - { value: "Use kubectl expose with type=internal", correct: false }
+      - { value: 'Add port mapping in the deployment manifest', correct: false }
+      - { value: 'Use pod-level IP forwarding', correct: false }
+      - { value: 'Create a Service of type NodePort or LoadBalancer', correct: true }
+      - { value: 'Use kubectl expose with type=internal', correct: false }
     help: https://kubernetes.io/docs/concepts/services-networking/service/
diff --git a/data/1_Orchestration/legacy_communication.yaml b/data/1_Orchestration/legacy_communication.yaml
index 0d9814b..e5639ff 100644
--- a/data/1_Orchestration/legacy_communication.yaml
+++ b/data/1_Orchestration/legacy_communication.yaml
@@ -2,90 +2,90 @@ questions:
   - uuid: 3db9c2fe-5d3d-4717-842b-8fcfdb7a7753
     question: Which of the following is a common method for a Dockerized application to communicate with a legacy database?
     answers:
-      - { value: "Run the legacy database inside the container", correct: false }
-      - { value: "Mount the database server into the container", correct: false }
-      - { value: "Expose the legacy database on the network and configure connection settings in the container", correct: true }
-      - { value: "Copy the legacy database files into the container", correct: false }
+      - { value: 'Run the legacy database inside the container', correct: false }
+      - { value: 'Mount the database server into the container', correct: false }
+      - { value: 'Expose the legacy database on the network and configure connection settings in the container', correct: true }
+      - { value: 'Copy the legacy database files into the container', correct: false }
     help: https://docs.docker.com/network/
 
   - uuid: 52be37c5-3737-44b8-8dd7-2b4f64bfc2a7
     question: What is the best way to ensure secure communication between a containerized app and a legacy HTTP service?
     answers:
-      - { value: "Run the legacy service in the same container", correct: false }
-      - { value: "Use host networking to bypass firewalls", correct: false }
-      - { value: "Use an encrypted network or VPN between the container and legacy system", correct: true }
-      - { value: "Use Docker secrets to store IP addresses", correct: false }
+      - { value: 'Run the legacy service in the same container', correct: false }
+      - { value: 'Use host networking to bypass firewalls', correct: false }
+      - { value: 'Use an encrypted network or VPN between the container and legacy system', correct: true }
+      - { value: 'Use Docker secrets to store IP addresses', correct: false }
     help: https://docs.docker.com/network/overlay/
 
   - uuid: 645f6f53-5365-4a65-bbe8-1fd6ea91fc25
     question: When connecting a Docker container to a legacy system on the host network, which network mode should be considered?
     answers:
-      - { value: "bridge", correct: false }
-      - { value: "host", correct: true }
-      - { value: "overlay", correct: false }
-      - { value: "none", correct: false }
+      - { value: 'bridge', correct: false }
+      - { value: 'host', correct: true }
+      - { value: 'overlay', correct: false }
+      - { value: 'none', correct: false }
     help: https://docs.docker.com/network/host/
 
   - uuid: 0977cf2d-6097-45d3-82fa-85432f5e33b0
     question: What is a limitation of using host networking for communication with legacy systems?
     answers:
-      - { value: "It disables DNS resolution", correct: false }
-      - { value: "It prevents access to Docker volumes", correct: false }
-      - { value: "The container loses access to environment variables", correct: false }
-      - { value: "Port conflicts with other containers or host services", correct: true }
+      - { value: 'It disables DNS resolution', correct: false }
+      - { value: 'It prevents access to Docker volumes', correct: false }
+      - { value: 'The container loses access to environment variables', correct: false }
+      - { value: 'Port conflicts with other containers or host services', correct: true }
     help: https://docs.docker.com/network/host/
 
   - uuid: b2f33b64-c880-4a58-b5c0-67ee3d2cc186
     question: Which of the following allows a container to resolve hostnames of legacy services running outside of Docker?
     answers:
-      - { value: "Using a shared volume", correct: false }
-      - { value: "--add-host flag when starting the container", correct: true }
-      - { value: "Creating a user-defined overlay network", correct: false }
-      - { value: "Using the `--dns` flag with the container’s IP", correct: false }
+      - { value: 'Using a shared volume', correct: false }
+      - { value: '--add-host flag when starting the container', correct: true }
+      - { value: 'Creating a user-defined overlay network', correct: false }
+      - { value: 'Using the `--dns` flag with the container’s IP', correct: false }
     help: https://docs.docker.com/network/bridge/#use--add-host-or--dns
 
   - uuid: 98fdc4f6-2753-49b3-a33e-5f4dc4227b71
     question: What is the role of a reverse proxy in connecting containerized apps to legacy systems?
     answers:
-      - { value: "It exposes Docker secrets externally", correct: false }
-      - { value: "It routes requests between containers and legacy services, handling protocols or authentication if needed", correct: true }
-      - { value: "It stores container logs securely", correct: false }
-      - { value: "It handles Swarm failover events", correct: false }
+      - { value: 'It exposes Docker secrets externally', correct: false }
+      - { value: 'It routes requests between containers and legacy services, handling protocols or authentication if needed', correct: true }
+      - { value: 'It stores container logs securely', correct: false }
+      - { value: 'It handles Swarm failover events', correct: false }
     help: https://docs.docker.com/network/proxy/
 
   - uuid: e74094a3-32f2-4dcf-a89d-84d5891d2c3f
     question: How can you allow a container to communicate with a legacy system that only allows specific IP ranges?
     answers:
-      - { value: "Expose the container on port 80", correct: false }
-      - { value: "Mount a volume from the legacy system", correct: false }
-      - { value: "Use a static IP assignment or run the container with host networking", correct: true }
-      - { value: "Use dynamic IP allocation via overlay network", correct: false }
+      - { value: 'Expose the container on port 80', correct: false }
+      - { value: 'Mount a volume from the legacy system', correct: false }
+      - { value: 'Use a static IP assignment or run the container with host networking', correct: true }
+      - { value: 'Use dynamic IP allocation via overlay network', correct: false }
     help: https://docs.docker.com/network/network-tutorial-host/
 
   - uuid: 36efbf34-91e6-49fd-9398-3948ae194c2c
     question: Which practice helps decouple Dockerized applications from legacy systems during a migration process?
     answers:
-      - { value: "Run the legacy system as a container", correct: false }
-      - { value: "Use API gateways or adapters between the container and the legacy system", correct: true }
-      - { value: "Write data to a shared disk", correct: false }
-      - { value: "Move the legacy system to the same subnet", correct: false }
+      - { value: 'Run the legacy system as a container', correct: false }
+      - { value: 'Use API gateways or adapters between the container and the legacy system', correct: true }
+      - { value: 'Write data to a shared disk', correct: false }
+      - { value: 'Move the legacy system to the same subnet', correct: false }
     help: https://12factor.net/backing-services
 
   - uuid: 53eb6a6f-4a6b-4f9d-b7aa-3fc2ce8862a5
     question: Which of the following would allow two-way communication between a Docker container and a legacy service on the host?
     answers:
-      - { value: "Enable privileged mode", correct: false }
-      - { value: "Use the special hostname `host.docker.internal`", correct: true }
-      - { value: "Run both in a shared volume", correct: false }
-      - { value: "Use the --dns flag", correct: false }
+      - { value: 'Enable privileged mode', correct: false }
+      - { value: 'Use the special hostname `host.docker.internal`', correct: true }
+      - { value: 'Run both in a shared volume', correct: false }
+      - { value: 'Use the --dns flag', correct: false }
     help: https://docs.docker.com/network/host/#use-cases
 
   - uuid: f71fc1f0-2634-439f-98e3-cd59a3e92fc1
     question: What Docker networking feature allows secure, encrypted communication between containers and legacy systems across nodes?
     answers:
-      - { value: "Bind mounts with host-only flag", correct: false }
-      - { value: "Loopback routing", correct: false }
-      - { value: "Bridge networks with --expose", correct: false }
-      - { value: "Overlay networks with encryption enabled", correct: true }
+      - { value: 'Bind mounts with host-only flag', correct: false }
+      - { value: 'Loopback routing', correct: false }
+      - { value: 'Bridge networks with --expose', correct: false }
+      - { value: 'Overlay networks with encryption enabled', correct: true }
     help: https://docs.docker.com/network/overlay/#encryption
 
diff --git a/data/1_Orchestration/manipulate_stacks.yaml b/data/1_Orchestration/manipulate_stacks.yaml
index e68416d..25a2c60 100644
--- a/data/1_Orchestration/manipulate_stacks.yaml
+++ b/data/1_Orchestration/manipulate_stacks.yaml
@@ -2,107 +2,107 @@ questions:
   - uuid: 81d03a71-4ff6-40f2-9a4a-324a5e6d4069
     question: Which command lists all active stacks?
     answers:
-      - { value: "docker stack ls", correct: true }
-      - { value: "docker stack show", correct: false }
-      - { value: "docker stack list", correct: false }
-      - { value: "docker service ls", correct: false }
+      - { value: 'docker stack ls', correct: true }
+      - { value: 'docker stack show', correct: false }
+      - { value: 'docker stack list', correct: false }
+      - { value: 'docker service ls', correct: false }
     help: https://docs.docker.com/reference/cli/docker/stack/ls/
 
   - uuid: e9887051-36fc-44aa-b85f-6f72647c1b3c
     question: Which command shows all services for a given stack?
     answers:
-      - { value: "docker stack services mystack", correct: true }
-      - { value: "docker service ps mystack", correct: false }
-      - { value: "docker stack show mystack", correct: false }
-      - { value: "docker service list mystack", correct: false }
+      - { value: 'docker stack services mystack', correct: true }
+      - { value: 'docker service ps mystack', correct: false }
+      - { value: 'docker stack show mystack', correct: false }
+      - { value: 'docker service list mystack', correct: false }
     help: https://docs.docker.com/reference/cli/docker/stack/services/
 
   - uuid: d120fbbe-7610-4a7c-888a-bebcb4cfbd37
     question: Which command displays detailed configuration of a stack?
     answers:
-      - { value: "docker inspect mystack", correct: false }
-      - { value: "docker stack show mystack", correct: false }
-      - { value: "docker stack config mystack", correct: false }
-      - { value: "docker stack inspect mystack", correct: true }
+      - { value: 'docker inspect mystack', correct: false }
+      - { value: 'docker stack show mystack', correct: false }
+      - { value: 'docker stack config mystack', correct: false }
+      - { value: 'docker stack inspect mystack', correct: true }
     help: https://docs.docker.com/reference/cli/docker/stack/
 
   - uuid: fda1bca2-2594-45c6-9fd3-9648b2850bd7
     question: Which command shows tasks running as part of a stack?
     answers:
-      - { value: "docker ps mystack", correct: false }
-      - { value: "docker stack tasks mystack", correct: false }
-      - { value: "docker service ps mystack", correct: false }
-      - { value: "docker stack ps mystack", correct: true }
+      - { value: 'docker ps mystack', correct: false }
+      - { value: 'docker stack tasks mystack', correct: false }
+      - { value: 'docker service ps mystack', correct: false }
+      - { value: 'docker stack ps mystack', correct: true }
     help: https://docs.docker.com/reference/cli/docker/stack/ps/
 
   - uuid: 4096e176-d8d6-4a57-b816-16348c9dd82f
     question: What command scales a service within a stack?
     answers:
-      - { value: "docker scale mystack_web 5", correct: false }
-      - { value: "docker stack scale web=5", correct: false }
-      - { value: "docker stack update web --replicas=5", correct: false }
-      - { value: "docker service scale mystack_web=5", correct: true }
+      - { value: 'docker scale mystack_web 5', correct: false }
+      - { value: 'docker stack scale web=5', correct: false }
+      - { value: 'docker stack update web --replicas=5', correct: false }
+      - { value: 'docker service scale mystack_web=5', correct: true }
     help: https://docs.docker.com/reference/cli/docker/service/scale/
 
   - uuid: 648d5a32-b9df-4a02-8c79-d51a52fa3617
     question: How can you update the image of a running service in a stack?
     answers:
-      - { value: "docker service update --image nginx:latest mystack_web", correct: true }
-      - { value: "docker stack update mystack --image nginx:latest", correct: false }
-      - { value: "docker service patch nginx:latest mystack_web", correct: false }
-      - { value: "docker stack redeploy mystack_web nginx:latest", correct: false }
+      - { value: 'docker service update --image nginx:latest mystack_web', correct: true }
+      - { value: 'docker stack update mystack --image nginx:latest', correct: false }
+      - { value: 'docker service patch nginx:latest mystack_web', correct: false }
+      - { value: 'docker stack redeploy mystack_web nginx:latest', correct: false }
     help: https://docs.docker.com/reference/cli/docker/service/update/
 
   - uuid: a101ab82-91bc-42c0-bc8f-2f1b8c8e36e7
     question: What is the purpose of 'docker stack rm'?
     answers:
-      - { value: "To delete unused Docker volumes", correct: false }
-      - { value: "To remove a container", correct: false }
-      - { value: "To remove a deployed stack and its services", correct: true }
-      - { value: "To stop the swarm mode", correct: false }
+      - { value: 'To delete unused Docker volumes', correct: false }
+      - { value: 'To remove a container', correct: false }
+      - { value: 'To remove a deployed stack and its services', correct: true }
+      - { value: 'To stop the swarm mode', correct: false }
     help: https://docs.docker.com/reference/cli/docker/stack/rm/
 
   - uuid: 822c755b-f871-4f35-90fb-93a5605983f8
     question: How can you update a stack after modifying docker-compose.yml?
     answers:
-      - { value: "docker stack update -f docker-compose.yml mystack", correct: false }
-      - { value: "docker stack deploy -c docker-compose.yml mystack", correct: true }
-      - { value: "docker compose up -d mystack", correct: false }
-      - { value: "docker service reload mystack", correct: false }
+      - { value: 'docker stack update -f docker-compose.yml mystack', correct: false }
+      - { value: 'docker stack deploy -c docker-compose.yml mystack', correct: true }
+      - { value: 'docker compose up -d mystack', correct: false }
+      - { value: 'docker service reload mystack', correct: false }
     help: https://docs.docker.com/reference/cli/docker/stack/deploy/
 
   - uuid: 39f281e1-ef96-40b7-b7b2-6930ee64e06a
     question: What happens to volumes when a stack is removed?
     answers:
-      - { value: "Volumes are preserved unless explicitly removed", correct: true }
-      - { value: "Volumes are converted into tmpfs", correct: false }
-      - { value: "Volumes are automatically deleted", correct: false }
-      - { value: "Volumes are backed up to /var/lib/docker", correct: false }
+      - { value: 'Volumes are preserved unless explicitly removed', correct: true }
+      - { value: 'Volumes are converted into tmpfs', correct: false }
+      - { value: 'Volumes are automatically deleted', correct: false }
+      - { value: 'Volumes are backed up to /var/lib/docker', correct: false }
     help: https://docs.docker.com/engine/swarm/stack-deploy/#prerequisites
 
   - uuid: 62b94c89-d7a0-43ec-8515-1898a8d7b2b1
     question: What command shows the image used by a service in a stack?
     answers:
-      - { value: "docker stack image mystack_web", correct: false }
-      - { value: "docker service info mystack_web", correct: false }
-      - { value: "docker stack inspect mystack_web --image", correct: false }
-      - { value: "docker service inspect mystack_web --format `{{.Spec.TaskTemplate.ContainerSpec.Image}}`", correct: true }
+      - { value: 'docker stack image mystack_web', correct: false }
+      - { value: 'docker service info mystack_web', correct: false }
+      - { value: 'docker stack inspect mystack_web --image', correct: false }
+      - { value: 'docker service inspect mystack_web --format `{{.Spec.TaskTemplate.ContainerSpec.Image}}`', correct: true }
     help: https://docs.docker.com/reference/cli/docker/service/inspect/
 
   - uuid: 6d1f6883-f92d-4690-9de1-c1df9a8a1044
     question: Which of these commands is invalid for managing stacks?
     answers:
-      - { value: "docker stack deploy -c docker-compose.yml mystack", correct: false }
-      - { value: "docker stack update mystack", correct: true }
-      - { value: "docker stack ps mystack", correct: false }
-      - { value: "docker stack services mystack", correct: false }
+      - { value: 'docker stack deploy -c docker-compose.yml mystack', correct: false }
+      - { value: 'docker stack update mystack', correct: true }
+      - { value: 'docker stack ps mystack', correct: false }
+      - { value: 'docker stack services mystack', correct: false }
     help: https://docs.docker.com/reference/cli/docker/stack/deploy/
 
   - uuid: e63599f1-2a42-40ee-9ac6-df7a01f6f3fb
     question: Why should you not use 'docker compose' instead of 'docker stack deploy' in swarm mode?
     answers:
-      - { value: "'docker compose' overwrites volumes", correct: false }
-      - { value: "'docker compose' does not deploy services in Swarm mode", correct: true }
-      - { value: "'docker compose' disables networking", correct: false }
-      - { value: "'docker compose' requires a manager token", correct: false }
+      - { value: 'docker compose overwrites volumes', correct: false }
+      - { value: 'docker compose does not deploy services in Swarm mode', correct: true }
+      - { value: 'docker compose disables networking', correct: false }
+      - { value: 'docker compose requires a manager token', correct: false }
     help: https://docs.docker.com/engine/swarm/stack-deploy/
diff --git a/data/1_Orchestration/mount_volumes.yaml b/data/1_Orchestration/mount_volumes.yaml
index a582ff4..02c7fe7 100644
--- a/data/1_Orchestration/mount_volumes.yaml
+++ b/data/1_Orchestration/mount_volumes.yaml
@@ -2,160 +2,160 @@ questions:
   - uuid: f4cc779b-4f38-4f9b-bb1e-874a730622cd
     question: What is the primary purpose of mounting a volume in Docker?
     answers:
-      - { value: "To increase CPU allocation", correct: false }
-      - { value: "To run the container in privileged mode", correct: false }
-      - { value: "To share networking between containers", correct: false }
-      - { value: "To persist data independently of the container lifecycle", correct: true }
+      - { value: 'To increase CPU allocation', correct: false }
+      - { value: 'To run the container in privileged mode', correct: false }
+      - { value: 'To share networking between containers', correct: false }
+      - { value: 'To persist data independently of the container lifecycle', correct: true }
     help: https://docs.docker.com/storage/volumes/
 
   - uuid: 9ad3bfc1-fb73-4a6f-8ae2-5b29045c857c
     question: What does the following command do? docker run -v myvolume:/data busybox
     answers:
-      - { value: "It maps a volume from another container", correct: false }
-      - { value: "It mounts the volume `myvolume` at /data in the container", correct: true }
-      - { value: "It adds a secret from a volume to the container", correct: false }
-      - { value: "It creates a bind mount to the host’s /data directory", correct: false }
+      - { value: 'It maps a volume from another container', correct: false }
+      - { value: 'It mounts the volume `myvolume` at /data in the container', correct: true }
+      - { value: 'It adds a secret from a volume to the container', correct: false }
+      - { value: 'It creates a bind mount to the host’s /data directory', correct: false }
     help: https://docs.docker.com/storage/volumes/
 
   - uuid: 71333e7b-774e-4327-894f-40324cf27632
     question: Which flag is used with docker service create to mount a volume in Swarm mode?
     answers:
-      - { value: "--volume", correct: false }
-      - { value: "--v", correct: false }
-      - { value: "--mount", correct: true }
-      - { value: "--bind", correct: false }
+      - { value: '--volume', correct: false }
+      - { value: '--v', correct: false }
+      - { value: '--mount', correct: true }
+      - { value: '--bind', correct: false }
     help: https://docs.docker.com/storage/volumes/#use-a-volume-with-docker-services
 
   - uuid: f46e74db-d046-4346-bf07-8d17b216a5c3
     question: What type of mount is most recommended for production use in Docker?
     answers:
-      - { value: "Anonymous volumes", correct: false }
-      - { value: "Named volumes", correct: true }
-      - { value: "tmpfs mounts", correct: false }
-      - { value: "Bind mounts", correct: false }
+      - { value: 'Anonymous volumes', correct: false }
+      - { value: 'Named volumes', correct: true }
+      - { value: 'tmpfs mounts', correct: false }
+      - { value: 'Bind mounts', correct: false }
     help: https://docs.docker.com/storage/volumes/#choose-the-right-type-of-mount
 
   - uuid: 85d40d8b-7eb1-4b27-82f7-51e694a4bfa2
     question: What happens when you use a named volume that doesn’t exist?
     answers:
-      - { value: "Docker automatically creates it", correct: true }
-      - { value: "It creates a bind mount to /tmp", correct: false }
-      - { value: "The container fails silently", correct: false }
-      - { value: "Docker throws an error and refuses to run", correct: false }
+      - { value: 'Docker automatically creates it', correct: true }
+      - { value: 'It creates a bind mount to /tmp', correct: false }
+      - { value: 'The container fails silently', correct: false }
+      - { value: 'Docker throws an error and refuses to run', correct: false }
     help: https://docs.docker.com/storage/volumes/#start-a-container-with-a-volume
 
   - uuid: 2b2e9f8c-a2f4-4668-8e8e-cd4e51a12f2e
     question: What happens when a non-empty volume is mounted over a directory that already contains files in a container?
     answers:
-      - { value: "An error is thrown at runtime", correct: false }
-      - { value: "Docker refuses to mount the volume", correct: false }
-      - { value: "The existing container files are obscured by the volume content", correct: true }
-      - { value: "Docker merges the content of the volume and the container directory", correct: false }
+      - { value: 'An error is thrown at runtime', correct: false }
+      - { value: 'Docker refuses to mount the volume', correct: false }
+      - { value: 'The existing container files are obscured by the volume content', correct: true }
+      - { value: 'Docker merges the content of the volume and the container directory', correct: false }
     help: https://docs.docker.com/storage/volumes/#mounting-a-volume-over-existing-data
 
   - uuid: ef5c2c80-f413-41df-bc60-16e89181d222
     question: Which mount propagation mode do Docker volumes use by default?
     answers:
-      - { value: "rprivate", correct: true }
-      - { value: "slave", correct: false }
-      - { value: "rshared", correct: false }
-      - { value: "shared", correct: false }
+      - { value: 'rprivate', correct: true }
+      - { value: 'slave', correct: false }
+      - { value: 'rshared', correct: false }
+      - { value: 'shared', correct: false }
     help: https://docs.docker.com/storage/volumes/#when-to-use-volumes
 
   - uuid: 7041ae89-e857-4c8c-93a6-418d8e7cfb79
     question: Which flag must be used to mount a volume subdirectory?
     answers:
-      - { value: "subdir", correct: false }
-      - { value: "volume-subpath", correct: true }
-      - { value: "mount-dir", correct: false }
-      - { value: "submount", correct: false }
+      - { value: 'subdir', correct: false }
+      - { value: 'volume-subpath', correct: true }
+      - { value: 'mount-dir', correct: false }
+      - { value: 'submount', correct: false }
     help: https://docs.docker.com/storage/volumes/#mount-a-volume-subdirectory
 
   - uuid: e1ff04e7-3483-4bc2-b8c2-f8a67e85b258
     question: Which command creates a named volume that uses the NFS driver with custom mount options?
     answers:
-      - { value: "docker volume create --type=nfs --mount-options addr=10.0.0.10 nfsvolume", correct: false }
-      - { value: "docker nfs create --device=/data --address=10.0.0.10 nfsvolume", correct: false }
-      - { value: "docker run --volume-driver=nfs:/data:/app nfsvolume", correct: false }
-      - { value: "docker volume create -d local -o type=nfs -o device=:/data -o o=addr=10.0.0.10 nfsvolume", correct: true }
+      - { value: 'docker volume create --type=nfs --mount-options addr=10.0.0.10 nfsvolume', correct: false }
+      - { value: 'docker nfs create --device=/data --address=10.0.0.10 nfsvolume', correct: false }
+      - { value: 'docker run --volume-driver=nfs:/data:/app nfsvolume', correct: false }
+      - { value: 'docker volume create -d local -o type=nfs -o device=:/data -o o=addr=10.0.0.10 nfsvolume', correct: true }
     help: https://docs.docker.com/storage/volumes/#create-a-service-which-creates-an-nfs-volume
 
   - uuid: 1fd63a5a-7d9a-4af0-a013-b0e28fc9d1d9
     question: When using an anonymous volume, what happens if the container is removed with `--rm`?
     answers:
-      - { value: "Docker raises an error about losing volume data", correct: false }
-      - { value: "The volume becomes named automatically", correct: false }
-      - { value: "The anonymous volume is removed along with the container", correct: true }
-      - { value: "The volume persists until explicitly pruned", correct: false }
+      - { value: 'Docker raises an error about losing volume data', correct: false }
+      - { value: 'The volume becomes named automatically', correct: false }
+      - { value: 'The anonymous volume is removed along with the container', correct: true }
+      - { value: 'The volume persists until explicitly pruned', correct: false }
     help: https://docs.docker.com/storage/volumes/#remove-anonymous-volumes
 
   - uuid: 4c3d1b19-c32d-4ad7-8888-5dd2b6e97f19
     question: Why is `--mount` preferred over `--volume` when creating advanced mounts?
     answers:
-      - { value: "Because --volume is deprecated", correct: false }
-      - { value: "Because it is required by Docker Compose", correct: false }
-      - { value: "Because it is the only option that supports named volumes", correct: false }
-      - { value: "Because it is more verbose and supports all mount options", correct: true }
+      - { value: 'Because --volume is deprecated', correct: false }
+      - { value: 'Because it is required by Docker Compose', correct: false }
+      - { value: 'Because it is the only option that supports named volumes', correct: false }
+      - { value: 'Because it is more verbose and supports all mount options', correct: true }
     help: https://docs.docker.com/storage/volumes/#syntax
 
   - uuid: 7c1ddc93-d034-4ed8-b65e-7af645edcc26
     question: What does the `volume-nocopy` option prevent?
     answers:
-      - { value: "Sharing the volume between containers", correct: false }
-      - { value: "Copying files from the container directory into the volume when it is empty", correct: true }
-      - { value: "Volume mounting on container restart", correct: false }
-      - { value: "Data synchronization between host and container", correct: false }
+      - { value: 'Sharing the volume between containers', correct: false }
+      - { value: 'Copying files from the container directory into the volume when it is empty', correct: true }
+      - { value: 'Volume mounting on container restart', correct: false }
+      - { value: 'Data synchronization between host and container', correct: false }
     help: https://docs.docker.com/storage/volumes/#options-for--mount
 
   - uuid: b4945d44-620e-4af6-bb47-9ec80253eefe
     question: What behavior is expected if two containers use the same named volume?
     answers:
-      - { value: "The second container gets a copy-on-write snapshot", correct: false }
-      - { value: "They can share data if not mounted as read-only", correct: true }
-      - { value: "Only one container has access at a time", correct: false }
-      - { value: "Docker denies simultaneous access", correct: false }
+      - { value: 'The second container gets a copy-on-write snapshot', correct: false }
+      - { value: 'They can share data if not mounted as read-only', correct: true }
+      - { value: 'Only one container has access at a time', correct: false }
+      - { value: 'Docker denies simultaneous access', correct: false }
     help: https://docs.docker.com/storage/volumes/#a-volumes-lifecycle
 
   - uuid: a5b12d1e-cba4-42d8-aebf-06325c9b621f
     question: What volume mount strategy should be used to avoid persistent data on container stop?
     answers:
-      - { value: "tmpfs mount", correct: true }
-      - { value: "Readonly named volume", correct: false }
-      - { value: "Ephemeral block mount", correct: false }
-      - { value: "Bind mount to /dev/null", correct: false }
+      - { value: 'tmpfs mount', correct: true }
+      - { value: 'Readonly named volume', correct: false }
+      - { value: 'Ephemeral block mount', correct: false }
+      - { value: 'Bind mount to /dev/null', correct: false }
     help: https://docs.docker.com/storage/tmpfs/
 
   - uuid: 8ddcd8aa-4783-4646-a938-01f1a9d2953f
     question: What command removes all unused volumes?
     answers:
-      - { value: "docker volume rm --unused", correct: false }
-      - { value: "docker volume gc", correct: false }
-      - { value: "docker volume clean", correct: false }
-      - { value: "docker volume prune", correct: true }
+      - { value: 'docker volume rm --unused', correct: false }
+      - { value: 'docker volume gc', correct: false }
+      - { value: 'docker volume clean', correct: false }
+      - { value: 'docker volume prune', correct: true }
     help: https://docs.docker.com/reference/cli/docker/volume/prune/
   - uuid: 19bdc9ba-d6b5-46f4-b8d9-9244ae7d3df7
     question: What happens when an empty volume is mounted into a container directory that contains files?
     answers:
-      - { value: "The volume remains empty", correct: false }
-      - { value: "Docker merges the volume and container files", correct: false }
-      - { value: "Docker copies the existing container files into the volume", correct: true }
-      - { value: "The container directory is cleared", correct: false }
+      - { value: 'The volume remains empty', correct: false }
+      - { value: 'Docker merges the volume and container files', correct: false }
+      - { value: 'Docker copies the existing container files into the volume', correct: true }
+      - { value: 'The container directory is cleared', correct: false }
     help: https://docs.docker.com/storage/volumes/#mounting-a-volume-over-existing-data
 
   - uuid: 7f89c209-e1cd-4f78-b6bc-471d80c53c2e
     question: When creating a Docker service with a local volume driver, what is the default behavior?
     answers:
-      - { value: "Volume is mounted read-only by default", correct: false }
-      - { value: "Each replica gets its own isolated volume", correct: true }
-      - { value: "Docker denies the use of local volumes in Swarm", correct: false }
-      - { value: "All replicas share a single volume", correct: false }
+      - { value: 'Volume is mounted read-only by default', correct: false }
+      - { value: 'Each replica gets its own isolated volume', correct: true }
+      - { value: 'Docker denies the use of local volumes in Swarm', correct: false }
+      - { value: 'All replicas share a single volume', correct: false }
     help: https://docs.docker.com/storage/volumes/#start-a-service-with-volumes
 
   - uuid: 07ae0b4d-c6b0-4f3c-90b0-4c4064c8b80f
     question: What is the purpose of the `--volumes-from` flag when running a container?
     answers:
-      - { value: "To bind-mount all host volumes", correct: false }
-      - { value: "To mount volumes from the Docker daemon", correct: false }
-      - { value: "To mount volumes from another container", correct: true }
-      - { value: "To create a temporary tmpfs mount", correct: false }
+      - { value: 'To bind-mount all host volumes', correct: false }
+      - { value: 'To mount volumes from the Docker daemon', correct: false }
+      - { value: 'To mount volumes from another container', correct: true }
+      - { value: 'To create a temporary tmpfs mount', correct: false }
     help: https://docs.docker.com/storage/volumes/#back-up-restore-or-migrate-data-volumes
\ No newline at end of file
diff --git a/data/1_Orchestration/replicated_vs_global_services.yaml b/data/1_Orchestration/replicated_vs_global_services.yaml
index 57a84c0..90c85f6 100644
--- a/data/1_Orchestration/replicated_vs_global_services.yaml
+++ b/data/1_Orchestration/replicated_vs_global_services.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: f197a91f-59d9-4a7e-a91e-1945058f0a77
     question: What is the difference between a replicated and a global service in Docker Swarm?
     answers:
-      - { value: "Replicated services run with constraints; global services do not", correct: false }
-      - { value: "Replicated services run a specified number of tasks; global services run one task per node", correct: true }
-      - { value: "Replicated services run only on managers; global on workers", correct: false }
-      - { value: "Replicated services restart on failure; global services do not", correct: false }
+      - { value: 'Replicated services run with constraints; global services do not', correct: false }
+      - { value: 'Replicated services run a specified number of tasks; global services run one task per node', correct: true }
+      - { value: 'Replicated services run only on managers; global on workers', correct: false }
+      - { value: 'Replicated services restart on failure; global services do not', correct: false }
     help: 'https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/#replicated-and-global-services'
 
   - uuid: 3df89c8c-7ab0-41bc-bcb3-b611f10a86bc
     question: Which command deploys a replicated service with 3 replicas?
     answers:
-      - { value: "docker service create --replicas 3 nginx", correct: true }
-      - { value: "docker run -d --replicas 3 nginx", correct: false }
-      - { value: "docker swarm create --replicas 3 nginx", correct: false }
-      - { value: "docker stack deploy -n nginx --replicas 3", correct: false }
+      - { value: 'docker service create --replicas 3 nginx', correct: true }
+      - { value: 'docker run -d --replicas 3 nginx', correct: false }
+      - { value: 'docker swarm create --replicas 3 nginx', correct: false }
+      - { value: 'docker stack deploy -n nginx --replicas 3', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/service/create/'
 
   - uuid: b61bfa3e-b383-4ac7-8e2e-9c9563ff401c
     question: How do you deploy a global service across all Swarm nodes?
     answers:
-      - { value: "docker service global create alpine", correct: false }
-      - { value: "docker run --global alpine top", correct: false }
-      - { value: "docker deploy --mode=global alpine", correct: false }
-      - { value: "docker service create --mode global alpine top", correct: true }
+      - { value: 'docker service global create alpine', correct: false }
+      - { value: 'docker run --global alpine top', correct: false }
+      - { value: 'docker deploy --mode=global alpine', correct: false }
+      - { value: 'docker service create --mode global alpine top', correct: true }
     help: 'https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/#global-services'
 
   - uuid: f5f03d17-3809-4ae1-b5d1-11b7586e36e6
     question: What happens if a new node joins a Swarm with a global service running?
     answers:
-      - { value: "The service is redeployed from scratch", correct: false }
-      - { value: "A task is automatically started on the new node", correct: true }
-      - { value: "The service is limited to existing nodes", correct: false }
-      - { value: "Only manager nodes get the new task", correct: false }
+      - { value: 'The service is redeployed from scratch', correct: false }
+      - { value: 'A task is automatically started on the new node', correct: true }
+      - { value: 'The service is limited to existing nodes', correct: false }
+      - { value: 'Only manager nodes get the new task', correct: false }
     help: 'https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/#global-services'
 
   - uuid: 1c731cfd-0520-46e4-a0cd-0b1f6a61c92c
     question: Which service mode is preferred for infrastructure services like logging or monitoring agents?
     answers:
-      - { value: "Replicated", correct: false }
-      - { value: "Global", correct: true }
-      - { value: "Init", correct: false }
-      - { value: "DaemonSet", correct: false }
+      - { value: 'Replicated', correct: false }
+      - { value: 'Global', correct: true }
+      - { value: 'Init', correct: false }
+      - { value: 'DaemonSet', correct: false }
     help: 'https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/#global-services'
 
   - uuid: 60c09d86-e0fd-4553-9a47-7b29b20d3c7b
     question: How do you verify if a service is running in global mode?
     answers:
-      - { value: "docker service inspect --pretty <service-name>", correct: true }
-      - { value: "docker node ls", correct: false }
-      - { value: "docker service ls --global", correct: false }
-      - { value: "docker ps --mode global", correct: false }
+      - { value: 'docker service inspect --pretty <service-name>', correct: true }
+      - { value: 'docker node ls', correct: false }
+      - { value: 'docker service ls --global', correct: false }
+      - { value: 'docker ps --mode global', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/inspect/'
 
   - uuid: 1c90c1b5-1b8b-42ef-97f2-1cc254c9ea1b
     question: Can you scale a global service with --replicas?
     answers:
-      - { value: "Yes, with --global-replicas", correct: false }
-      - { value: "No, scaling applies only to replicated services", correct: true }
-      - { value: "Yes, with constraints", correct: false }
-      - { value: "Yes, but only once", correct: false }
+      - { value: 'Yes, with --global-replicas', correct: false }
+      - { value: 'No, scaling applies only to replicated services', correct: true }
+      - { value: 'Yes, with constraints', correct: false }
+      - { value: 'Yes, but only once', correct: false }
     help: 'https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/#replicated-and-global-services'
 
   - uuid: 96e4b032-1a7a-4f9b-b7bc-3c9edda96a7a
     question: What is the default mode when creating a Docker Swarm service?
     answers:
-      - { value: "Replicated", correct: true }
-      - { value: "Global", correct: false }
-      - { value: "Host", correct: false }
-      - { value: "Bridge", correct: false }
+      - { value: 'Replicated', correct: true }
+      - { value: 'Global', correct: false }
+      - { value: 'Host', correct: false }
+      - { value: 'Bridge', correct: false }
     help: 'https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/'
 
   - uuid: 0ce3ce95-ec45-47fc-891e-6cce5378104e
     question: Which of the following can only be used with replicated services?
     answers:
-      - { value: "Scaling using docker service scale", correct: true }
-      - { value: "Networks", correct: false }
-      - { value: "Secrets", correct: false }
-      - { value: "Constraints", correct: false }
+      - { value: 'Scaling using docker service scale', correct: true }
+      - { value: 'Networks', correct: false }
+      - { value: 'Secrets', correct: false }
+      - { value: 'Constraints', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/service/scale/'
 
   - uuid: f9c82f46-9c42-44d3-b3bb-4c5a0d1153f6
     question: Which command would show the number of tasks of a global service?
     answers:
-      - { value: "docker node inspect", correct: false }
-      - { value: "docker service ps <service>", correct: true }
-      - { value: "docker inspect <service>", correct: false }
-      - { value: "docker ps -a", correct: false }
+      - { value: 'docker node inspect', correct: false }
+      - { value: 'docker service ps <service>', correct: true }
+      - { value: 'docker inspect <service>', correct: false }
+      - { value: 'docker ps -a', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/service/ps/'
diff --git a/data/1_Orchestration/troubleshoot_service.yaml b/data/1_Orchestration/troubleshoot_service.yaml
index f9513e1..ca48726 100644
--- a/data/1_Orchestration/troubleshoot_service.yaml
+++ b/data/1_Orchestration/troubleshoot_service.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: 1c31a263-f738-474c-9d80-847b4ff980b3
     question: What command can you use to check the state of a service’s tasks?
     answers:
-      - { value: "docker service ps <service_name>", correct: true }
-      - { value: "docker ps", correct: false }
-      - { value: "docker swarm status", correct: false }
-      - { value: "docker service inspect", correct: false }
+      - { value: 'docker service ps <service_name>', correct: true }
+      - { value: 'docker ps', correct: false }
+      - { value: 'docker swarm status', correct: false }
+      - { value: 'docker service inspect', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/service_ps/
 
   - uuid: 52b46d0d-cc6b-4c45-b96f-4b208fd03013
     question: If a service task shows “Rejected” state repeatedly, what should you check first?
     answers:
-      - { value: "The container image name and its availability", correct: true }
-      - { value: "The system time on the worker node", correct: false }
-      - { value: "The Swarm join token", correct: false }
-      - { value: "Whether MTLS is enabled", correct: false }
+      - { value: 'The container image name and its availability', correct: true }
+      - { value: 'The system time on the worker node', correct: false }
+      - { value: 'The Swarm join token', correct: false }
+      - { value: 'Whether MTLS is enabled', correct: false }
     help: https://docs.docker.com/engine/daemon/troubleshoot/#troubleshoot-service-issues
 
   - uuid: 3fbd7e3e-b5ee-4cf4-90ef-26483087f29a
     question: Which command provides detailed information including environment and mounts for a service?
     answers:
-      - { value: "docker service logs", correct: false }
-      - { value: "docker service inspect <service_name>", correct: true }
-      - { value: "docker inspect <task_id>", correct: false }
-      - { value: "docker container inspect <service_name>", correct: false }
+      - { value: 'docker service logs', correct: false }
+      - { value: 'docker service inspect <service_name>', correct: true }
+      - { value: 'docker inspect <task_id>', correct: false }
+      - { value: 'docker container inspect <service_name>', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/service_inspect/
 
   - uuid: 0d33b399-00a3-4d7e-aee7-54b60aa5c51c
     question: Which command helps to view runtime logs of a failing service?
     answers:
-      - { value: "docker stack logs <service_name>", correct: false }
-      - { value: "docker logs <service_name>", correct: false }
-      - { value: "journalctl -u docker", correct: false }
-      - { value: "docker service logs <service_name>", correct: true }
+      - { value: 'docker stack logs <service_name>', correct: false }
+      - { value: 'docker logs <service_name>', correct: false }
+      - { value: 'journalctl -u docker', correct: false }
+      - { value: 'docker service logs <service_name>', correct: true }
     help: https://docs.docker.com/engine/reference/commandline/service_logs/
 
   - uuid: c3f47e65-daa5-48fd-bf2a-4e7fa8778082
     question: Which status in `docker service ps` indicates the task never started due to a configuration error?
     answers:
-      - { value: "Rejected", correct: true }
-      - { value: "Running", correct: false }
-      - { value: "Shutdown", correct: false }
-      - { value: "Preparing", correct: false }
+      - { value: 'Rejected', correct: true }
+      - { value: 'Running', correct: false }
+      - { value: 'Shutdown', correct: false }
+      - { value: 'Preparing', correct: false }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/#task-states
 
   - uuid: 60f15284-214c-4d5c-9210-c420ca5f4696
     question: What should you check if a service is stuck in “Pending” state?
     answers:
-      - { value: "Image size", correct: false }
-      - { value: "Node availability or placement constraints", correct: true }
-      - { value: "Replica count", correct: false }
-      - { value: "Swarm quorum", correct: false }
+      - { value: 'Image size', correct: false }
+      - { value: 'Node availability or placement constraints', correct: true }
+      - { value: 'Replica count', correct: false }
+      - { value: 'Swarm quorum', correct: false }
     help: https://docs.docker.com/engine/daemon/troubleshoot/
 
   - uuid: b23cfc7d-cfd6-4c64-bc6b-7711e20a9517
     question: Which of the following is NOT helpful in diagnosing why a service isn’t running?
     answers:
-      - { value: "Checking the Docker Hub stars for the image", correct: true }
-      - { value: "Viewing service logs", correct: false }
-      - { value: "Reviewing `docker service ps` output", correct: false }
-      - { value: "Inspecting the service definition", correct: false }
+      - { value: 'Checking the Docker Hub stars for the image', correct: true }
+      - { value: 'Viewing service logs', correct: false }
+      - { value: 'Reviewing `docker service ps` output', correct: false }
+      - { value: 'Inspecting the service definition', correct: false }
     help: https://docs.docker.com/engine/daemon/troubleshoot/
 
   - uuid: 5ff79c36-92a2-4d00-b3bc-cdf2d8ee43ae
     question: What option can you add to `docker service create` to avoid issues with unavailable nodes?
     answers:
-      - { value: "--constraint 'node.role == worker'", correct: true }
-      - { value: "--replicas 0", correct: false }
-      - { value: "--network bridge", correct: false }
-      - { value: "--name unique_service", correct: false }
+      - { value: '--constraint node.role == worker', correct: true }
+      - { value: '--replicas 0', correct: false }
+      - { value: '--network bridge', correct: false }
+      - { value: '--name unique_service', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/service_create/#--constraint
 
   - uuid: d7d789a1-e374-4d4f-a0ee-83a0a1e63380
     question: What can be a cause if a task keeps restarting and failing in a loop?
     answers:
-      - { value: "Swarm leader is unavailable", correct: false }
-      - { value: "Missing TLS certificates", correct: false }
-      - { value: "The network driver is set to overlay", correct: false }
-      - { value: "CrashLoop due to entrypoint failure or healthcheck failure", correct: true }
+      - { value: 'Swarm leader is unavailable', correct: false }
+      - { value: 'Missing TLS certificates', correct: false }
+      - { value: 'The network driver is set to overlay', correct: false }
+      - { value: 'CrashLoop due to entrypoint failure or healthcheck failure', correct: true }
     help: https://docs.docker.com/engine/daemon/troubleshoot/#debug-service-failures
 
   - uuid: fcf13d7b-418e-498b-8577-3a62be443adb
     question: What environment setting can help prevent log flooding during service failures?
     answers:
-      - { value: "Reduce replicas to 0", correct: false }
-      - { value: "Disable the entrypoint", correct: false }
-      - { value: "Use log-driver=json-file", correct: false }
-      - { value: "Use restart-delay in deploy configuration", correct: true }
+      - { value: 'Reduce replicas to 0', correct: false }
+      - { value: 'Disable the entrypoint', correct: false }
+      - { value: 'Use log-driver=json-file', correct: false }
+      - { value: 'Use restart-delay in deploy configuration', correct: true }
     help: https://docs.docker.com/compose/compose-file/compose-file-v3/#restart_policy
diff --git a/data/1_Orchestration/use_templates_with_service_create.yaml b/data/1_Orchestration/use_templates_with_service_create.yaml
index 09bf9e7..584135d 100644
--- a/data/1_Orchestration/use_templates_with_service_create.yaml
+++ b/data/1_Orchestration/use_templates_with_service_create.yaml
@@ -2,71 +2,71 @@ questions:
   - uuid: 95c3a6ef-631a-46de-ae3d-05ad066401b3
     question: What is the purpose of using templates in `docker service create`?
     answers:
-      - { value: "To modify container logs at runtime", correct: false }
-      - { value: "To inject dynamic values like node hostname or ID into service definitions", correct: true }
-      - { value: "To manage DNS entries for overlay networks", correct: false }
-      - { value: "To install dependencies before a container runs", correct: false }
+      - { value: 'To modify container logs at runtime', correct: false }
+      - { value: 'To inject dynamic values like node hostname or ID into service definitions', correct: true }
+      - { value: 'To manage DNS entries for overlay networks', correct: false }
+      - { value: 'To install dependencies before a container runs', correct: false }
     help: https://docs.docker.com/engine/swarm/services/#using-templates-for-service-configuration
 
   - uuid: 16be6c18-40b5-490e-81e6-d122e49a74f3
     question: Which of the following template variables can be used in a Swarm service?
     answers:
-      - { value: "{{.Node.Hostname}}", correct: true }
-      - { value: "{{.Service.Labels}}", correct: true }
-      - { value: "{{.Task.Name}}", correct: true }
-      - { value: "{{.Container.Name}}", correct: false }
+      - { value: '{{.Node.Hostname}}', correct: true }
+      - { value: '{{.Service.Labels}}', correct: true }
+      - { value: '{{.Task.Name}}', correct: true }
+      - { value: '{{.Container.Name}}', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/service_create/#templating
 
   - uuid: 2ff277f7-8590-4d4a-b402-fbc255ed48e4
     question: What happens if you use an invalid template variable in `docker service create`?
     answers:
-      - { value: "Docker silently replaces it with null", correct: false }
-      - { value: "The service will fail to deploy", correct: true }
-      - { value: "It disables the templating system for that field", correct: false }
-      - { value: "The value is ignored and replaced with a default", correct: false }
+      - { value: 'Docker silently replaces it with null', correct: false }
+      - { value: 'The service will fail to deploy', correct: true }
+      - { value: 'It disables the templating system for that field', correct: false }
+      - { value: 'The value is ignored and replaced with a default', correct: false }
     help: https://docs.docker.com/engine/swarm/services/#using-templates-for-service-configuration
 
   - uuid: 0112b58a-4bc4-4439-a3db-b3b92c4c6920
     question: Which option supports templates in `docker service create`?
     answers:
-      - { value: "--replicas", correct: false }
-      - { value: "--hostname", correct: true }
-      - { value: "--network", correct: false }
-      - { value: "--limit-cpu", correct: false }
+      - { value: '--replicas', correct: false }
+      - { value: '--hostname', correct: true }
+      - { value: '--network', correct: false }
+      - { value: '--limit-cpu', correct: false }
     help: https://docs.docker.com/engine/swarm/services/#using-templates-for-service-configuration
 
   - uuid: 2c326b2d-c3d1-466e-89b1-ea623f22171f
     question: How can you create a service where each task writes its hostname to a log file?
     answers:
-      - { value: "Use `--env LOG_FILE=/var/log/{{.Node.Hostname}}.log`", correct: true }
-      - { value: "Use `--mount type=log,source={{.Task.ID}}`", correct: false }
-      - { value: "Use `docker-compose` with environment variables only", correct: false }
-      - { value: "Set the hostname with `docker run`", correct: false }
+      - { value: 'Use `--env LOG_FILE=/var/log/{{.Node.Hostname}}.log`', correct: true }
+      - { value: 'Use `--mount type=log,source={{.Task.ID}}`', correct: false }
+      - { value: 'Use `docker-compose` with environment variables only', correct: false }
+      - { value: 'Set the hostname with `docker run`', correct: false }
     help: https://docs.docker.com/engine/swarm/services/#using-templates-for-service-configuration
 
   - uuid: edb263d2-12c5-4484-8915-7c1f5d4022a1
     question: Which of the following is a valid use of a template in `--mount`?
     answers:
-      - { value: "--mount type=bind,source=/tmp/{{.Node.IP}},target=/cache", correct: false }
-      - { value: "--mount slot={{.Task.Slot}},target=/data", correct: false }
-      - { value: "--mount source=host,template=true,target=/host", correct: false }
-      - { value: "--mount type=volume,source=mydata_{{.Task.Slot}},target=/data", correct: true }
+      - { value: '--mount type=bind,source=/tmp/{{.Node.IP}},target=/cache', correct: false }
+      - { value: '--mount slot={{.Task.Slot}},target=/data', correct: false }
+      - { value: '--mount source=host,template=true,target=/host', correct: false }
+      - { value: '--mount type=volume,source=mydata_{{.Task.Slot}},target=/data', correct: true }
     help: https://docs.docker.com/engine/reference/commandline/service_create/#templating
 
   - uuid: 1baf354e-3af0-4b44-bb8d-0a181021e33a
     question: What is a common use case for `{{.Task.Slot}}` in Swarm service templates?
     answers:
-      - { value: "To limit the number of replicas", correct: false }
-      - { value: "To scale tasks across nodes", correct: false }
-      - { value: "To create unique volume names for each replica", correct: true }
-      - { value: "To change the default network driver", correct: false }
+      - { value: 'To limit the number of replicas', correct: false }
+      - { value: 'To scale tasks across nodes', correct: false }
+      - { value: 'To create unique volume names for each replica', correct: true }
+      - { value: 'To change the default network driver', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/service_create/#templating
 
   - uuid: 8ed09c02-1e30-4b52-aab4-31992ea87236
     question: Why is it important to test Go template expressions before using them in production?
     answers:
-      - { value: "They are only supported in Docker EE", correct: false }
-      - { value: "A malformed template can cause the service deployment to fail", correct: true }
-      - { value: "Templates automatically escalate privileges", correct: false }
-      - { value: "Go templates consume high memory", correct: false }
+      - { value: 'They are only supported in Docker EE', correct: false }
+      - { value: 'A malformed template can cause the service deployment to fail', correct: true }
+      - { value: 'Templates automatically escalate privileges', correct: false }
+      - { value: 'Go templates consume high memory', correct: false }
     help: https://docs.docker.com/engine/swarm/services/#using-templates-for-service-configuration
diff --git a/data/2_Image_creation_management_registry/apply_file_create_image.yaml b/data/2_Image_creation_management_registry/apply_file_create_image.yaml
index 5a034bf..d3aff62 100644
--- a/data/2_Image_creation_management_registry/apply_file_create_image.yaml
+++ b/data/2_Image_creation_management_registry/apply_file_create_image.yaml
@@ -2,80 +2,80 @@ questions:
   - uuid: e2cf6c76-d515-4fc1-8e65-d5370d237b3f
     question: Which Dockerfile instruction is used to copy a file into an image?
     answers:
-      - { value: "COPY", correct: true }
-      - { value: "EXPOSE", correct: false }
-      - { value: "ADD", correct: false }
-      - { value: "RUN", correct: false }
+      - { value: 'COPY', correct: true }
+      - { value: 'EXPOSE', correct: false }
+      - { value: 'ADD', correct: false }
+      - { value: 'RUN', correct: false }
     help: 'https://docs.docker.com/reference/dockerfile/#copy'
 
   - uuid: 51e63025-cab4-4082-a274-f16135581d9d
     question: Which command builds a Docker image using a Dockerfile in the current directory?
     answers:
-      - { value: "docker run -f Dockerfile .", correct: false }
-      - { value: "docker compile -t my-image", correct: false }
-      - { value: "docker image create -f Dockerfile", correct: false }
-      - { value: "docker build -t my-image .", correct: true }
+      - { value: 'docker run -f Dockerfile .', correct: false }
+      - { value: 'docker compile -t my-image', correct: false }
+      - { value: 'docker image create -f Dockerfile', correct: false }
+      - { value: 'docker build -t my-image .', correct: true }
     help: 'https://docs.docker.com/reference/cli/docker/buildx/build/'
 
   - uuid: b651ccf6-2036-447a-a28a-4bde2c5e9315
     question: What is the difference between ADD and COPY in a Dockerfile?
     answers:
-      - { value: "COPY supports extracting archives", correct: false }
-      - { value: "ADD is deprecated", correct: false }
-      - { value: "ADD supports remote URLs and extraction of archives", correct: true }
-      - { value: "COPY is slower than ADD", correct: false }
+      - { value: 'COPY supports extracting archives', correct: false }
+      - { value: 'ADD is deprecated', correct: false }
+      - { value: 'ADD supports remote URLs and extraction of archives', correct: true }
+      - { value: 'COPY is slower than ADD', correct: false }
     help: 'https://docs.docker.com/build/building/best-practices/#add-or-copy'
 
   - uuid: 0bd9629e-51e1-4071-a175-6e6a250d6b8b
     question: Which best practice is recommended when copying files into an image?
     answers:
-      - { value: "Use ADD for all file operations", correct: false }
-      - { value: "Minimize the number of COPY layers", correct: true }
-      - { value: "Always copy the entire context", correct: false }
-      - { value: "Copy sensitive files and delete them later", correct: false }
+      - { value: 'Use ADD for all file operations', correct: false }
+      - { value: 'Minimize the number of COPY layers', correct: true }
+      - { value: 'Always copy the entire context', correct: false }
+      - { value: 'Copy sensitive files and delete them later', correct: false }
     help: 'https://docs.docker.com/build/building/best-practices/#leverage-build-cache'
 
   - uuid: 2a5cf0b6-13d1-4a8b-8f34-0d7b56e35820
     question: In Docker, what does the build context refer to?
     answers:
-      - { value: "The Dockerfile instructions", correct: false }
-      - { value: "The directory sent to the Docker daemon during build", correct: true }
-      - { value: "The internal state of a container", correct: false }
-      - { value: "The contents of the base image", correct: false }
+      - { value: 'The Dockerfile instructions', correct: false }
+      - { value: 'The directory sent to the Docker daemon during build', correct: true }
+      - { value: 'The internal state of a container', correct: false }
+      - { value: 'The contents of the base image', correct: false }
     help: 'https://docs.docker.com/build/concepts/context/'
 
   - uuid: b40b2bb8-f5b3-4e97-bff9-bf19593f6d02
     question: What happens if you try to COPY a file not included in the build context?
     answers:
-      - { value: "The build will fail", correct: true }
-      - { value: "Docker fetches it from the host root", correct: false }
-      - { value: "It will be ignored silently", correct: false }
-      - { value: "Docker downloads it from Docker Hub", correct: false }
+      - { value: 'The build will fail', correct: true }
+      - { value: 'Docker fetches it from the host root', correct: false }
+      - { value: 'It will be ignored silently', correct: false }
+      - { value: 'Docker downloads it from Docker Hub', correct: false }
     help: 'https://docs.docker.com/reference/dockerfile/#copy'
 
   - uuid: e453cd2a-2a9e-4648-a9f8-891987c7eb15
     question: Where should the Dockerfile be located in relation to the files it needs to copy?
     answers:
-      - { value: "In /usr/local/bin", correct: false }
-      - { value: "In the same or a parent directory of the build context", correct: true }
-      - { value: "In a different directory outside the context", correct: false }
-      - { value: "In the same directory as the Docker daemon", correct: false }
+      - { value: 'In /usr/local/bin', correct: false }
+      - { value: 'In the same or a parent directory of the build context', correct: true }
+      - { value: 'In a different directory outside the context', correct: false }
+      - { value: 'In the same directory as the Docker daemon', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/buildx/build/#dockerignore-file'
 
   - uuid: 6ae4b58f-d5bb-4706-95df-53d7b2c03e1a
     question: How can you exclude files from being sent to the Docker daemon during a build?
     answers:
-      - { value: "Use an EXCLUDE instruction in the Dockerfile", correct: false }
-      - { value: "Use a .dockerignore file", correct: true }
-      - { value: "Use the --exclude flag", correct: false }
-      - { value: "Files are automatically excluded by Docker", correct: false }
+      - { value: 'Use an EXCLUDE instruction in the Dockerfile', correct: false }
+      - { value: 'Use a .dockerignore file', correct: true }
+      - { value: 'Use the --exclude flag', correct: false }
+      - { value: 'Files are automatically excluded by Docker', correct: false }
     help: 'https://docs.docker.com/reference/dockerfile/#dockerignore-file'
 
   - uuid: 6c02d847-f098-49b7-8547-08dfd53ef3b1
     question: Which of the following instructions is preferred for copying local files into an image when no archive extraction is needed?
     answers:
-      - { value: "ADD", correct: false }
-      - { value: "RUN", correct: false }
-      - { value: "INCLUDE", correct: false }
-      - { value: "COPY", correct: true }
+      - { value: 'ADD', correct: false }
+      - { value: 'RUN', correct: false }
+      - { value: 'INCLUDE', correct: false }
+      - { value: 'COPY', correct: true }
     help: 'https://docs.docker.com/build/building/best-practices/#add-or-copy'
diff --git a/data/2_Image_creation_management_registry/deploy_registry.yaml b/data/2_Image_creation_management_registry/deploy_registry.yaml
index 8be5f27..aa7501f 100644
--- a/data/2_Image_creation_management_registry/deploy_registry.yaml
+++ b/data/2_Image_creation_management_registry/deploy_registry.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: a961e16e-1660-4a6d-8a3c-01391d8a109b
     question: What is the command to deploy an official Docker registry container?
     answers:
-      - { value: "docker start registry:2", correct: false }
-      - { value: "docker deploy registry", correct: false }
-      - { value: "docker run -d -p 5000:5000 --name registry registry:2", correct: true }
-      - { value: "docker image push registry:2", correct: false }
+      - { value: 'docker start registry:2', correct: false }
+      - { value: 'docker deploy registry', correct: false }
+      - { value: 'docker run -d -p 5000:5000 --name registry registry:2', correct: true }
+      - { value: 'docker image push registry:2', correct: false }
     help: 'https://docs.docker.com/registry/deploying/'
 
   - uuid: 1ae849c1-286f-419b-a6df-7931a5f650e5
     question: Which port is exposed by default in the official Docker registry image?
     answers:
-      - { value: "2375", correct: false }
-      - { value: "443", correct: false }
-      - { value: "5000", correct: true }
-      - { value: "80", correct: false }
+      - { value: '2375', correct: false }
+      - { value: '443', correct: false }
+      - { value: '5000', correct: true }
+      - { value: '80', correct: false }
     help: 'https://docs.docker.com/registry/'
 
   - uuid: b34b189f-1d12-452e-ae42-88c531cf9b26
     question: What is the purpose of setting the environment variable `REGISTRY_STORAGE_FILESYSTEM_ROOTDIRECTORY` in the registry container?
     answers:
-      - { value: "To configure the path for storing image data", correct: true }
-      - { value: "To expose a custom port", correct: false }
-      - { value: "To connect to Docker Hub", correct: false }
-      - { value: "To define registry authentication", correct: false }
+      - { value: 'To configure the path for storing image data', correct: true }
+      - { value: 'To expose a custom port', correct: false }
+      - { value: 'To connect to Docker Hub', correct: false }
+      - { value: 'To define registry authentication', correct: false }
     help: 'https://docs.docker.com/registry/configuration/'
 
   - uuid: 51a93188-2a87-4fd5-b1c4-c6373ce3e57a
     question: What storage backend is used by default in the official registry image?
     answers:
-      - { value: "S3", correct: false }
-      - { value: "Azure Blob Storage", correct: false }
-      - { value: "Google Cloud Storage", correct: false }
-      - { value: "Filesystem", correct: true }
+      - { value: 'S3', correct: false }
+      - { value: 'Azure Blob Storage', correct: false }
+      - { value: 'Google Cloud Storage', correct: false }
+      - { value: 'Filesystem', correct: true }
     help: 'https://docs.docker.com/registry/storage-drivers/'
 
   - uuid: 6f15f3b7-0323-45f3-8cbf-9f546d5d49c6
     question: What should you do to make a local registry accessible from Docker clients on the same host?
     answers:
-      - { value: "Disable port forwarding", correct: false }
-      - { value: "Add it to the list of insecure registries in the daemon config", correct: true }
-      - { value: "Use the --tlsverify flag in all client commands", correct: false }
-      - { value: "Create a volume named registry", correct: false }
+      - { value: 'Disable port forwarding', correct: false }
+      - { value: 'Add it to the list of insecure registries in the daemon config', correct: true }
+      - { value: 'Use the --tlsverify flag in all client commands', correct: false }
+      - { value: 'Create a volume named registry', correct: false }
     help: 'https://docs.docker.com/registry/insecure/'
 
   - uuid: d37b4247-0e18-4a6d-bdbb-f87938cf408e
     question: Where should you configure an insecure registry on a Linux system?
     answers:
-      - { value: "/etc/registry/config.yml", correct: false }
-      - { value: "/usr/bin/dockerd", correct: false }
-      - { value: "/etc/docker/daemon.json", correct: true }
-      - { value: "~/.docker/config.json", correct: false }
+      - { value: '/etc/registry/config.yml', correct: false }
+      - { value: '/usr/bin/dockerd', correct: false }
+      - { value: '/etc/docker/daemon.json', correct: true }
+      - { value: '~/.docker/config.json', correct: false }
     help: 'https://docs.docker.com/registry/insecure/'
 
   - uuid: b7e4c63d-dde0-4063-9f1a-507a98cb0b11
     question: Which of the following is required to make a private registry production-ready?
     answers:
-      - { value: "Run on a non-standard port", correct: false }
-      - { value: "Use the Alpine base image", correct: false }
-      - { value: "Enable TLS using a valid certificate", correct: true }
-      - { value: "Run in host network mode", correct: false }
+      - { value: 'Run on a non-standard port', correct: false }
+      - { value: 'Use the Alpine base image', correct: false }
+      - { value: 'Enable TLS using a valid certificate', correct: true }
+      - { value: 'Run in host network mode', correct: false }
     help: 'https://docs.docker.com/registry/deploying/#running-a-domain-registry'
 
   - uuid: 287ba12b-8638-4bcb-9fbd-34f5360a062c
     question: What is the risk of exposing a registry without TLS in production?
     answers:
-      - { value: "It will be slower to push images", correct: false }
-      - { value: "The registry will become read-only", correct: false }
-      - { value: "Credentials and images can be intercepted", correct: true }
-      - { value: "The container might crash", correct: false }
+      - { value: 'It will be slower to push images', correct: false }
+      - { value: 'The registry will become read-only', correct: false }
+      - { value: 'Credentials and images can be intercepted', correct: true }
+      - { value: 'The container might crash', correct: false }
     help: 'https://docs.docker.com/registry/insecure/'
 
   - uuid: 8a2a97f2-5ff2-408e-bcc3-3fcdf5e2024f
     question: Which of the following mounts would persist registry image data?
     answers:
-      - { value: "docker run -d registry:2", correct: false }
-      - { value: "docker run -v /opt/registry:/var/lib/registry registry:2", correct: true }
-      - { value: "docker run --mount type=bind,target=/var/run/docker.sock registry:2", correct: false }
-      - { value: "docker run --tmpfs /var/lib/registry registry:2", correct: false }
+      - { value: 'docker run -d registry:2', correct: false }
+      - { value: 'docker run -v /opt/registry:/var/lib/registry registry:2', correct: true }
+      - { value: 'docker run --mount type=bind,target=/var/run/docker.sock registry:2', correct: false }
+      - { value: 'docker run --tmpfs /var/lib/registry registry:2', correct: false }
     help: 'https://docs.docker.com/registry/storage-drivers/filesystem/'
 
   - uuid: f5d7dc60-c003-41e3-9058-381b2b0dd5c5
     question: Which configuration file allows customizing a registry with authentication, storage, and logging options?
     answers:
-      - { value: "docker-compose.yml", correct: false }
-      - { value: "daemon.json", correct: false }
-      - { value: "registry.conf", correct: false }
-      - { value: "config.yml", correct: true }
+      - { value: 'docker-compose.yml', correct: false }
+      - { value: 'daemon.json', correct: false }
+      - { value: 'registry.conf', correct: false }
+      - { value: 'config.yml', correct: true }
     help: 'https://docs.docker.com/registry/configuration/'
diff --git a/data/2_Image_creation_management_registry/describe_add_copy_volumes_expose_entrypoint.yaml b/data/2_Image_creation_management_registry/describe_add_copy_volumes_expose_entrypoint.yaml
index 27b1560..b99e0b0 100644
--- a/data/2_Image_creation_management_registry/describe_add_copy_volumes_expose_entrypoint.yaml
+++ b/data/2_Image_creation_management_registry/describe_add_copy_volumes_expose_entrypoint.yaml
@@ -2,63 +2,63 @@ questions:
   - uuid: 53f78b5c-1f2e-4a38-a2bc-1e3035c35eac
     question: What is the purpose of the ADD instruction in a Dockerfile?
     answers:
-      - { value: "To copy files and extract remote archives", correct: true }
-      - { value: "To download images from a registry", correct: false }
-      - { value: "To execute a command during build", correct: false }
+      - { value: 'To copy files and extract remote archives', correct: true }
+      - { value: 'To download images from a registry', correct: false }
+      - { value: 'To execute a command during build', correct: false }
     help: https://docs.docker.com/engine/reference/builder/#add
 
   - uuid: 40838e71-0431-4df2-a943-16860128cb58
     question: How does COPY differ from ADD in Dockerfiles?
     answers:
-      - { value: "COPY can handle remote URLs like ADD", correct: false }
-      - { value: "COPY only copies local files without extraction", correct: true }
-      - { value: "COPY installs dependencies", correct: false }
+      - { value: 'COPY can handle remote URLs like ADD', correct: false }
+      - { value: 'COPY only copies local files without extraction', correct: true }
+      - { value: 'COPY installs dependencies', correct: false }
     help: https://docs.docker.com/engine/reference/builder/#copy
 
   - uuid: 3a2c3006-f8cf-43d2-9d94-5602c8a239fc
     question: What does VOLUME do in a Dockerfile?
     answers:
-      - { value: "Mounts a remote volume at runtime", correct: false }
-      - { value: "Defines image build layers", correct: false }
-      - { value: "Declares a mount point for persistent data", correct: true }
+      - { value: 'Mounts a remote volume at runtime', correct: false }
+      - { value: 'Defines image build layers', correct: false }
+      - { value: 'Declares a mount point for persistent data', correct: true }
     help: https://docs.docker.com/engine/reference/builder/#volume
 
   - uuid: 1dbcf23d-c54b-4f4a-a5e3-ec614e66ff4c
     question: What is the function of EXPOSE in a Dockerfile?
     answers:
-      - { value: "Publishes ports to the host", correct: false }
-      - { value: "Opens firewall ports automatically", correct: false }
-      - { value: "Documents which ports the container listens on", correct: true }
+      - { value: 'Publishes ports to the host', correct: false }
+      - { value: 'Opens firewall ports automatically', correct: false }
+      - { value: 'Documents which ports the container listens on', correct: true }
     help: https://docs.docker.com/engine/reference/builder/#expose
 
   - uuid: b33939a6-9cfa-4ff2-9e32-209299cb04b3
     question: Why would you use ENTRYPOINT instead of CMD?
     answers:
-      - { value: "To define a fixed binary that always runs in the container", correct: true }
-      - { value: "To override the container image name", correct: false }
-      - { value: "To expose a port for incoming traffic", correct: false }
+      - { value: 'To define a fixed binary that always runs in the container', correct: true }
+      - { value: 'To override the container image name', correct: false }
+      - { value: 'To expose a port for incoming traffic', correct: false }
     help: https://docs.docker.com/engine/reference/builder/#entrypoint
 
   - uuid: d5991f59-934f-4fa8-b5b4-6b0f43017080
     question: Which instruction is best for extracting a remote tar.gz file into the image?
     answers:
-      - { value: "VOLUME", correct: false }
-      - { value: "COPY", correct: false }
-      - { value: "ADD", correct: true }
+      - { value: 'VOLUME', correct: false }
+      - { value: 'COPY', correct: false }
+      - { value: 'ADD', correct: true }
     help: https://docs.docker.com/engine/reference/builder/#add
 
   - uuid: c65c18c0-199a-4c82-a9a2-8ce6edce60a4
     question: What happens when you use EXPOSE without publishing the port?
     answers:
-      - { value: "The port becomes accessible from the host immediately", correct: false }
-      - { value: "The port is documented but not published to the host automatically", correct: true }
-      - { value: "Docker maps it to a random host port", correct: false }
+      - { value: 'The port becomes accessible from the host immediately', correct: false }
+      - { value: 'The port is documented but not published to the host automatically', correct: true }
+      - { value: 'Docker maps it to a random host port', correct: false }
     help: https://docs.docker.com/engine/reference/builder/#expose
   - uuid: 3fc5d85e-d5cd-4a96-9b27-bd10a5893e14
     question: What makes the ADD instruction different from COPY in Dockerfiles?
     answers:
-      - { value: "It requires a separate metadata file for each addition", correct: false }
-      - { value: "It prevents caching of layers during build", correct: false }
-      - { value: "It supports fetching files from remote HTTPS URLs and extracting local tar archives", correct: true }
-      - { value: "It compresses files when copying to the image", correct: false }
+      - { value: 'It requires a separate metadata file for each addition', correct: false }
+      - { value: 'It prevents caching of layers during build', correct: false }
+      - { value: 'It supports fetching files from remote HTTPS URLs and extracting local tar archives', correct: true }
+      - { value: 'It compresses files when copying to the image', correct: false }
     help: https://docs.docker.com/engine/reference/builder/#add
diff --git a/data/2_Image_creation_management_registry/describe_demonstrate_how_create_efficient_image_via_dockerfile.yaml b/data/2_Image_creation_management_registry/describe_demonstrate_how_create_efficient_image_via_dockerfile.yaml
index fc5a5da..b43fe15 100644
--- a/data/2_Image_creation_management_registry/describe_demonstrate_how_create_efficient_image_via_dockerfile.yaml
+++ b/data/2_Image_creation_management_registry/describe_demonstrate_how_create_efficient_image_via_dockerfile.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: d51595e0-e02e-44c3-98e7-9993f4f124b4
     question: Why is it recommended to use a minimal base image like `alpine`?
     answers:
-      - { value: "It speeds up runtime performance", correct: false }
-      - { value: "It reduces the final image size", correct: true }
-      - { value: "It automatically updates security patches", correct: false }
-      - { value: "It includes systemd support by default", correct: false }
+      - { value: 'It speeds up runtime performance', correct: false }
+      - { value: 'It reduces the final image size', correct: true }
+      - { value: 'It automatically updates security patches', correct: false }
+      - { value: 'It includes systemd support by default', correct: false }
     help: 'https://docs.docker.com/develop/dev-best-practices/#use-a-small-base-image'
 
   - uuid: 320a3c3b-cbee-4e36-9491-66aa9d2f13b6
     question: What is the advantage of using multi-stage builds in a Dockerfile?
     answers:
-      - { value: "It enables parallel build execution", correct: false }
-      - { value: "It allows creating smaller final images by excluding build dependencies", correct: true }
-      - { value: "It improves runtime performance by splitting processes", correct: false }
-      - { value: "It allows using multiple base OSes in the same image", correct: false }
+      - { value: 'It enables parallel build execution', correct: false }
+      - { value: 'It allows creating smaller final images by excluding build dependencies', correct: true }
+      - { value: 'It improves runtime performance by splitting processes', correct: false }
+      - { value: 'It allows using multiple base OSes in the same image', correct: false }
     help: 'https://docs.docker.com/develop/develop-images/multistage-build/'
 
   - uuid: 8307e190-b728-4cb6-a406-90b86dd23de4
     question: Why should you avoid using `latest` as a tag in the `FROM` instruction?
     answers:
-      - { value: "It increases image size", correct: false }
-      - { value: "It can lead to non-reproducible builds", correct: true }
-      - { value: "It forces the image to run in privileged mode", correct: false }
-      - { value: "It disables caching in image layers", correct: false }
+      - { value: 'It increases image size', correct: false }
+      - { value: 'It can lead to non-reproducible builds', correct: true }
+      - { value: 'It forces the image to run in privileged mode', correct: false }
+      - { value: 'It disables caching in image layers', correct: false }
     help: 'https://docs.docker.com/develop/dev-best-practices/#pin-versions-of-base-images'
 
   - uuid: f65d1575-7769-45b6-97b6-b3b5c5082681
     question: What is the impact of combining `RUN` instructions into a single layer?
     answers:
-      - { value: "It disables multi-architecture support", correct: false }
-      - { value: "It prevents the use of environment variables", correct: false }
-      - { value: "It increases build time but improves caching", correct: false }
-      - { value: "It reduces the number of layers and overall image size", correct: true }
+      - { value: 'It disables multi-architecture support', correct: false }
+      - { value: 'It prevents the use of environment variables', correct: false }
+      - { value: 'It increases build time but improves caching', correct: false }
+      - { value: 'It reduces the number of layers and overall image size', correct: true }
     help: 'https://docs.docker.com/develop/dev-best-practices/#minimize-the-number-of-layers'
 
   - uuid: 3beecfae-4006-460f-9391-b7d9fefbc6e5
     question: What is a best practice when installing packages in a Dockerfile?
     answers:
-      - { value: "Use `apt install` without updating package lists", correct: false }
-      - { value: "Use `--no-install-recommends` to avoid unnecessary dependencies", correct: true }
-      - { value: "Install all packages in separate `RUN` statements", correct: false }
-      - { value: "Always update the system packages with `apt upgrade`", correct: false }
+      - { value: 'Use `apt install` without updating package lists', correct: false }
+      - { value: 'Use `--no-install-recommends` to avoid unnecessary dependencies', correct: true }
+      - { value: 'Install all packages in separate `RUN` statements', correct: false }
+      - { value: 'Always update the system packages with `apt upgrade`', correct: false }
     help: 'https://docs.docker.com/develop/dev-best-practices/#run'
 
   - uuid: c63d21fc-7982-4cd2-b3d4-22df8bc9fd44
     question: Why is it recommended to clean up temporary files and caches in Dockerfile?
     answers:
-      - { value: "To allow multi-user support", correct: false }
-      - { value: "To avoid invalid syntax", correct: false }
-      - { value: "To improve container runtime speed", correct: false }
-      - { value: "To reduce image size and avoid unnecessary files", correct: true }
+      - { value: 'To allow multi-user support', correct: false }
+      - { value: 'To avoid invalid syntax', correct: false }
+      - { value: 'To improve container runtime speed', correct: false }
+      - { value: 'To reduce image size and avoid unnecessary files', correct: true }
     help: 'https://docs.docker.com/develop/dev-best-practices/#run'
 
   - uuid: 05df128d-4b2c-4ae2-9e0c-06e01a5d2b12
     question: How can the use of `.dockerignore` contribute to image efficiency?
     answers:
-      - { value: "It prevents unnecessary files from being sent to the Docker daemon", correct: true }
-      - { value: "It increases the number of layers for better caching", correct: false }
-      - { value: "It forces Docker to rebuild the image", correct: false }
-      - { value: "It speeds up container startup", correct: false }
+      - { value: 'It prevents unnecessary files from being sent to the Docker daemon', correct: true }
+      - { value: 'It increases the number of layers for better caching', correct: false }
+      - { value: 'It forces Docker to rebuild the image', correct: false }
+      - { value: 'It speeds up container startup', correct: false }
     help: 'https://docs.docker.com/develop/dev-best-practices/#dockerignore'
 
   - uuid: 3e42b90e-6a91-44a9-aac2-cdc846e933a2
     question: What is a downside of installing packages with `curl | sh` in a Dockerfile?
     answers:
-      - { value: "It fails on Alpine images", correct: false }
-      - { value: "It makes the build non-reproducible and less secure", correct: true }
-      - { value: "It disables multi-stage support", correct: false }
-      - { value: "It improves cache layer efficiency", correct: false }
+      - { value: 'It fails on Alpine images', correct: false }
+      - { value: 'It makes the build non-reproducible and less secure', correct: true }
+      - { value: 'It disables multi-stage support', correct: false }
+      - { value: 'It improves cache layer efficiency', correct: false }
     help: 'https://docs.docker.com/develop/dev-best-practices/#installing-software'
 
   - uuid: 6c6b165c-59bb-41ef-900f-38b5485b1d1e
     question: Which of the following helps to leverage Docker's layer caching effectively?
     answers:
-      - { value: "Install dependencies last", correct: false }
-      - { value: "Order instructions from least to most frequently changing", correct: true }
-      - { value: "Use ENV variables before FROM", correct: false }
-      - { value: "Avoid using COPY commands", correct: false }
+      - { value: 'Install dependencies last', correct: false }
+      - { value: 'Order instructions from least to most frequently changing', correct: true }
+      - { value: 'Use ENV variables before FROM', correct: false }
+      - { value: 'Avoid using COPY commands', correct: false }
     help: 'https://docs.docker.com/develop/dev-best-practices/#leverage-build-cache'
 
   - uuid: 2fa7635b-e142-42bc-979e-7a361927e4a7
     question: Why should secrets or tokens never be added in Dockerfile ENV instructions?
     answers:
-      - { value: "Because image layers are stored in cleartext and cached", correct: true }
-      - { value: "Because ENV variables are not supported", correct: false }
-      - { value: "Because Docker blocks secret keys automatically", correct: false }
-      - { value: "Because they are encrypted by default", correct: false }
+      - { value: 'Because image layers are stored in cleartext and cached', correct: true }
+      - { value: 'Because ENV variables are not supported', correct: false }
+      - { value: 'Because Docker blocks secret keys automatically', correct: false }
+      - { value: 'Because they are encrypted by default', correct: false }
     help: 'https://docs.docker.com/develop/dev-best-practices/#dont-store-secrets-in-images'
diff --git a/data/2_Image_creation_management_registry/describe_demonstrate_how_to_inspec_images_report_specifi_attributes_using_filter_format.yaml b/data/2_Image_creation_management_registry/describe_demonstrate_how_to_inspec_images_report_specifi_attributes_using_filter_format.yaml
index f047e7c..dcaca16 100644
--- a/data/2_Image_creation_management_registry/describe_demonstrate_how_to_inspec_images_report_specifi_attributes_using_filter_format.yaml
+++ b/data/2_Image_creation_management_registry/describe_demonstrate_how_to_inspec_images_report_specifi_attributes_using_filter_format.yaml
@@ -2,132 +2,132 @@ questions:
   - uuid: 0e51f02d-00e1-47dc-9184-c07b73e9e0b6
     question: Which Docker command lists all images along with their size and creation time?
     answers:
-      - { value: "docker images", correct: true }
-      - { value: "docker image history", correct: false }
-      - { value: "docker ls", correct: false }
-      - { value: "docker inspect", correct: false }
+      - { value: 'docker images', correct: true }
+      - { value: 'docker image history', correct: false }
+      - { value: 'docker ls', correct: false }
+      - { value: 'docker inspect', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/ls/
 
   - uuid: 24020e62-804b-4bb8-9992-908a3c7e090c
     question: Which option would you use to list all images, including intermediate ones?
     answers:
-      - { value: "--digests", correct: false }
-      - { value: "--no-trunc", correct: false }
-      - { value: "--all", correct: true }
-      - { value: "--verbose", correct: false }
+      - { value: '--digests', correct: false }
+      - { value: '--no-trunc', correct: false }
+      - { value: '--all', correct: true }
+      - { value: '--verbose', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/ls/
 
   - uuid: 9a2b6c0c-3f82-4fcf-92b4-7f3b3241b78d
     question: What does the `--digests` flag show when used with `docker image ls`?
     answers:
-      - { value: "Layer count per image", correct: false }
-      - { value: "Total image size on disk", correct: false }
-      - { value: "Content-addressable identifiers (SHA digests)", correct: true }
-      - { value: "Image build logs", correct: false }
+      - { value: 'Layer count per image', correct: false }
+      - { value: 'Total image size on disk', correct: false }
+      - { value: 'Content-addressable identifiers (SHA digests)', correct: true }
+      - { value: 'Image build logs', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/ls/
 
   - uuid: c4dcd1a3-2e52-41f2-b1b1-b2eb20861a5e
     question: What placeholder should you use with `--format` to display the image repository?
     answers:
-      - { value: ".Image", correct: false }
-      - { value: ".Tag", correct: false }
-      - { value: ".Name", correct: false }
-      - { value: ".Repository", correct: true }
+      - { value: '.Image', correct: false }
+      - { value: '.Tag', correct: false }
+      - { value: '.Name', correct: false }
+      - { value: '.Repository', correct: true }
     help: https://docs.docker.com/reference/cli/docker/image/ls/
 
   - uuid: b0a18a67-7c4e-44cf-869d-393f6aa3a239
     question: Which of the following would show image IDs and repositories using Go templates?
     answers:
-      - { value: "docker images --format '{{.ID}}: {{.Repository}}'", correct: true }
-      - { value: "docker images --format '{{.Image}}: {{.Name}}'", correct: false }
+      - { value: 'docker images --format "{{.ID}}: {{.Repository}}"', correct: true }
+      - { value: 'docker images --format "{{.Image}}: {{.Name}}"', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/ls/
 
   - uuid: e54ad2de-5be4-4385-944b-d0c991d3f88e
     question: What does the `--format` flag allow in `docker images`?
     answers:
-      - { value: "Compression of image layers", correct: false }
-      - { value: "Custom output using Go templates", correct: true }
-      - { value: "Filtering by tag", correct: false }
-      - { value: "Binary output for API usage", correct: false }
+      - { value: 'Compression of image layers', correct: false }
+      - { value: 'Custom output using Go templates', correct: true }
+      - { value: 'Filtering by tag', correct: false }
+      - { value: 'Binary output for API usage', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/ls/#format-the-output---format
 
   - uuid: d9e7e73c-c8f3-46cc-b6c0-734a53b939fc
     question: Which Go template variable shows the image’s tag?
     answers:
-      - { value: ".RepositoryTag", correct: false }
-      - { value: ".Tag", correct: true }
-      - { value: ".Label", correct: false }
-      - { value: ".Tags", correct: false }
+      - { value: '.RepositoryTag', correct: false }
+      - { value: '.Tag', correct: true }
+      - { value: '.Label', correct: false }
+      - { value: '.Tags', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/ls/#format-the-output---format
 
   - uuid: 67917938-64c5-4a76-9152-871db7e60db8
     question: What does the `--digests` flag show in `docker images`?
     answers:
-      - { value: "Untagged containers", correct: false }
-      - { value: "Image file system structure", correct: false }
-      - { value: "Content-addressable image identifiers", correct: true }
-      - { value: "All intermediate layers", correct: false }
+      - { value: 'Untagged containers', correct: false }
+      - { value: 'Image file system structure', correct: false }
+      - { value: 'Content-addressable image identifiers', correct: true }
+      - { value: 'All intermediate layers', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/ls/#list-image-digests---digests
 
   - uuid: 4622a734-8c7e-4f91-bd8a-55e7fd31c43e
     question: How can you list untagged (dangling) images?
     answers:
-      - { value: "docker image ls --null-tags", correct: false }
-      - { value: "docker images --filter dangling=true", correct: true }
-      - { value: "docker list --untagged", correct: false }
-      - { value: "docker images --no-tag", correct: false }
+      - { value: 'docker image ls --null-tags', correct: false }
+      - { value: 'docker images --filter dangling=true', correct: true }
+      - { value: 'docker list --untagged', correct: false }
+      - { value: 'docker images --no-tag', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/ls/#show-untagged-images-dangling
 
   - uuid: 1d489cd9-31c5-4264-93cd-0b300d2bfa92
     question: How can you output `docker images` results in JSON format?
     answers:
-      - { value: "docker images --format json", correct: true }
-      - { value: "docker inspect --json images", correct: false }
-      - { value: "docker images --output=json", correct: false }
-      - { value: "docker image ls --json", correct: false }
+      - { value: 'docker images --format json', correct: true }
+      - { value: 'docker inspect --json images', correct: false }
+      - { value: 'docker images --output=json', correct: false }
+      - { value: 'docker image ls --json', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/ls/#format-the-output---format
 
   - uuid: 87721cd7-d13a-40c2-b4a3-1c21e962f1cf
     question: Which flag in `docker images` prevents shortening of image IDs?
     answers:
-      - { value: "--extended", correct: false }
-      - { value: "--no-trunc", correct: true }
-      - { value: "--verbose", correct: false }
-      - { value: "--full-id", correct: false }
+      - { value: '--extended', correct: false }
+      - { value: '--no-trunc', correct: true }
+      - { value: '--verbose', correct: false }
+      - { value: '--full-id', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/ls/#list-the-full-length-image-ids---no-trunc
 
   - uuid: 1fe9c007-5c7e-4f2f-9c55-9a942d74efec
     question: What is the result of `docker images alpine:latest`?
     answers:
-      - { value: "Shows untagged alpine images", correct: false }
-      - { value: "Lists only the alpine image with tag latest", correct: true }
-      - { value: "Lists all alpine tags", correct: false }
-      - { value: "Displays all images created after alpine", correct: false }
+      - { value: 'Shows untagged alpine images', correct: false }
+      - { value: 'Lists only the alpine image with tag latest', correct: true }
+      - { value: 'Lists all alpine tags', correct: false }
+      - { value: 'Displays all images created after alpine', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/ls/#list-images-by-name-and-tag
 
   - uuid: b963e979-9975-4de0-bf3b-3ac93d537029
     question: What filter lists only images created before `ubuntu:20.04`?
     answers:
-      - { value: "--filter created<ubuntu:20.04", correct: false }
-      - { value: "--before ubuntu:20.04", correct: false }
-      - { value: "--filter before=ubuntu:20.04", correct: true }
-      - { value: "--filter earlier=ubuntu:20.04", correct: false }
+      - { value: '--filter created<ubuntu:20.04', correct: false }
+      - { value: '--before ubuntu:20.04', correct: false }
+      - { value: '--filter before=ubuntu:20.04', correct: true }
+      - { value: '--filter earlier=ubuntu:20.04', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/ls/#filter-images-by-time
 
   - uuid: 85c92a25-fdb0-4f47-8f08-09975e05aeef
     question: Which filter will select images with label `env=prod`?
     answers:
-      - { value: "--filter label=env=prod", correct: true }
-      - { value: "--filter env=prod", correct: false }
-      - { value: "--env prod", correct: false }
-      - { value: "--label filter=env=prod", correct: false }
+      - { value: '--filter label=env=prod', correct: true }
+      - { value: '--filter env=prod', correct: false }
+      - { value: '--env prod', correct: false }
+      - { value: '--label filter=env=prod', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/ls/#show-images-with-a-given-label
 
   - uuid: 34e63460-e69c-4e71-961f-726a42a1e4e2
     question: Which `--format` template displays repository and tag as a table?
     answers:
-      - { value: "{{.Repository}}:{{.Tag}}", correct: false }
-      - { value: "table {{.Repository}}\\t{{.Tag}}", correct: true }
-      - { value: "table {{.Tag}}\\t{{.Repository}}", correct: false }
-      - { value: "table {{.Name}}\\t{{.Tag}}", correct: false }
+      - { value: '{{.Repository}}:{{.Tag}}', correct: false }
+      - { value: 'table {{.Repository}}\\t{{.Tag}}', correct: true }
+      - { value: 'table {{.Tag}}\\t{{.Repository}}', correct: false }
+      - { value: 'table {{.Name}}\\t{{.Tag}}', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/ls/#format-the-output---format
diff --git a/data/2_Image_creation_management_registry/describe_demonstrate_how_to_tag_image.yaml b/data/2_Image_creation_management_registry/describe_demonstrate_how_to_tag_image.yaml
index 9acbaa5..4fbc121 100644
--- a/data/2_Image_creation_management_registry/describe_demonstrate_how_to_tag_image.yaml
+++ b/data/2_Image_creation_management_registry/describe_demonstrate_how_to_tag_image.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: b5f0c99c-4164-48df-b297-3e640d012774
     question: What is the purpose of tagging an image in Docker?
     answers:
-      - { value: "To assign a human-readable identifier to an image", correct: true }
-      - { value: "To compress the image", correct: false }
-      - { value: "To run the image in privileged mode", correct: false }
-      - { value: "To encrypt the image contents", correct: false }
+      - { value: 'To assign a human-readable identifier to an image', correct: true }
+      - { value: 'To compress the image', correct: false }
+      - { value: 'To run the image in privileged mode', correct: false }
+      - { value: 'To encrypt the image contents', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/tag/
 
   - uuid: 46ce021c-91c5-4ef1-b1e6-c3a9056fd138
     question: What is the correct syntax to tag an image?
     answers:
-      - { value: "docker image rename", correct: false }
-      - { value: "docker tag SOURCE_IMAGE TARGET_IMAGE[:TAG]", correct: true }
-      - { value: "docker add-tag SOURCE TARGET", correct: false }
-      - { value: "docker tag-image --source TARGET", correct: false }
+      - { value: 'docker image rename', correct: false }
+      - { value: 'docker tag SOURCE_IMAGE TARGET_IMAGE[:TAG]', correct: true }
+      - { value: 'docker add-tag SOURCE TARGET', correct: false }
+      - { value: 'docker tag-image --source TARGET', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/tag/
 
   - uuid: b1687c8f-459a-4991-b1ff-91edce5895cd
     question: What happens if you omit the `:TAG` portion when tagging an image?
     answers:
-      - { value: "Docker removes the previous tag", correct: false }
-      - { value: "Docker tags the image as `default`", correct: false }
-      - { value: "Docker fails with an error", correct: false }
-      - { value: "Docker assigns the tag `latest` by default", correct: true }
+      - { value: 'Docker removes the previous tag', correct: false }
+      - { value: 'Docker tags the image as `default`', correct: false }
+      - { value: 'Docker fails with an error', correct: false }
+      - { value: 'Docker assigns the tag `latest` by default', correct: true }
     help: https://docs.docker.com/reference/cli/docker/image/tag/
 
   - uuid: 24784794-39d6-4edb-88a1-22960ed02aaf
     question: What is a valid example of tagging a local image `myimage` as version `v1`?
     answers:
-      - { value: "docker tag v1 myrepo/myimage", correct: false }
-      - { value: "docker tag myrepo:v1 myimage", correct: false }
-      - { value: "docker tag --version v1 myimage", correct: false }
-      - { value: "docker tag myimage myrepo/myimage:v1", correct: true }
+      - { value: 'docker tag v1 myrepo/myimage', correct: false }
+      - { value: 'docker tag myrepo:v1 myimage', correct: false }
+      - { value: 'docker tag --version v1 myimage', correct: false }
+      - { value: 'docker tag myimage myrepo/myimage:v1', correct: true }
     help: https://docs.docker.com/reference/cli/docker/image/tag/
 
   - uuid: c82abf04-f9df-421c-9bdf-57d0c4f5cf4e
     question: What is the effect of tagging an image with a registry name?
     answers:
-      - { value: "Prepares the image for pushing to the specified registry", correct: true }
-      - { value: "Starts an automatic image scan", correct: false }
-      - { value: "Encrypts the image for transport", correct: false }
-      - { value: "Removes all other tags", correct: false }
+      - { value: 'Prepares the image for pushing to the specified registry', correct: true }
+      - { value: 'Starts an automatic image scan', correct: false }
+      - { value: 'Encrypts the image for transport', correct: false }
+      - { value: 'Removes all other tags', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/tag/
 
   - uuid: 19ae74a1-987f-4e0b-b89c-c292ba62cd63
     question: What does the command `docker tag myapp:latest myregistry.example.com/myapp:v2` do?
     answers:
-      - { value: "Creates a new tag referencing the same image", correct: true }
-      - { value: "Renames the image", correct: false }
-      - { value: "Pushes the image to the registry", correct: false }
-      - { value: "Moves the image to a new repository", correct: false }
+      - { value: 'Creates a new tag referencing the same image', correct: true }
+      - { value: 'Renames the image', correct: false }
+      - { value: 'Pushes the image to the registry', correct: false }
+      - { value: 'Moves the image to a new repository', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/tag/
 
   - uuid: 78057aa2-caf1-474f-937e-bdc997a8ab69
     question: What is the maximum number of tags an image can have?
     answers:
-      - { value: "Ten", correct: false }
-      - { value: "Unlimited", correct: true }
-      - { value: "One", correct: false }
-      - { value: "Depends on the registry", correct: false }
+      - { value: 'Ten', correct: false }
+      - { value: 'Unlimited', correct: true }
+      - { value: 'One', correct: false }
+      - { value: 'Depends on the registry', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/tag/
 
   - uuid: 9722b92e-b65b-47a5-b41d-f37ef4d37723
     question: If two tags point to the same image ID, what happens when you remove one tag?
     answers:
-      - { value: "The image is deleted", correct: false }
-      - { value: "Docker removes the image from the local cache", correct: false }
-      - { value: "The image remains accessible via the other tag", correct: true }
-      - { value: "All tags are removed", correct: false }
+      - { value: 'The image is deleted', correct: false }
+      - { value: 'Docker removes the image from the local cache', correct: false }
+      - { value: 'The image remains accessible via the other tag', correct: true }
+      - { value: 'All tags are removed', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/tag/
 
   - uuid: e4cfbe38-3033-4b0e-8f2e-3f1ec1992c0e
     question: Can you tag an image with a full URL including port number?
     answers:
-      - { value: "Only if the port is 443", correct: false }
-      - { value: "No, Docker only supports docker.io", correct: false }
-      - { value: "Yes, for private registries", correct: true }
-      - { value: "Only if using TLS", correct: false }
+      - { value: 'Only if the port is 443', correct: false }
+      - { value: 'No, Docker only supports docker.io', correct: false }
+      - { value: 'Yes, for private registries', correct: true }
+      - { value: 'Only if using TLS', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/tag/
 
   - uuid: 13d4e4eb-4dc9-42f6-93de-7620386fc093
     question: What is the role of image tags in CI/CD pipelines?
     answers:
-      - { value: "They prevent image pulling from registries", correct: false }
-      - { value: "They compress image size", correct: false }
-      - { value: "They allow version tracking and promote immutable deployments", correct: true }
-      - { value: "They are only for internal registry use", correct: false }
+      - { value: 'They prevent image pulling from registries', correct: false }
+      - { value: 'They compress image size', correct: false }
+      - { value: 'They allow version tracking and promote immutable deployments', correct: true }
+      - { value: 'They are only for internal registry use', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/tag/
diff --git a/data/2_Image_creation_management_registry/describe_demonstrate_how_use_cli_command_manage_images_list_delete_prune_rmi.yaml b/data/2_Image_creation_management_registry/describe_demonstrate_how_use_cli_command_manage_images_list_delete_prune_rmi.yaml
index d60eee3..d5db2de 100644
--- a/data/2_Image_creation_management_registry/describe_demonstrate_how_use_cli_command_manage_images_list_delete_prune_rmi.yaml
+++ b/data/2_Image_creation_management_registry/describe_demonstrate_how_use_cli_command_manage_images_list_delete_prune_rmi.yaml
@@ -2,162 +2,162 @@ questions:
   - uuid: 03f11c15-58be-4f32-9d6c-61f30f03fd83
     question: What does the `docker image ls` command do?
     answers:
-      - { value: "Lists all local images", correct: true }
-      - { value: "Deletes all containers", correct: false }
-      - { value: "Removes all unused images", correct: false }
-      - { value: "Pulls all available tags", correct: false }
+      - { value: 'Lists all local images', correct: true }
+      - { value: 'Deletes all containers', correct: false }
+      - { value: 'Removes all unused images', correct: false }
+      - { value: 'Pulls all available tags', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/image/ls/'
 
   - uuid: 0de7c78c-c9f7-4f47-a9f6-609ad49c59f4
     question: How do you delete an image with ID `abc123`?
     answers:
-      - { value: "docker image rm abc123", correct: true }
-      - { value: "docker image delete abc123", correct: false }
-      - { value: "docker delete image abc123", correct: false }
-      - { value: "docker rm image abc123", correct: false }
+      - { value: 'docker image rm abc123', correct: true }
+      - { value: 'docker image delete abc123', correct: false }
+      - { value: 'docker delete image abc123', correct: false }
+      - { value: 'docker rm image abc123', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/image/rm/'
 
   - uuid: 0f7d1518-e4d5-46c2-b25f-2b5a253ad4c7
     question: What happens if you delete an image that is used by a container?
     answers:
-      - { value: "Nothing happens", correct: false }
-      - { value: "Docker will prevent the deletion", correct: true }
-      - { value: "The image is forcibly deleted and the container breaks", correct: false }
-      - { value: "The container is automatically removed", correct: false }
+      - { value: 'Nothing happens', correct: false }
+      - { value: 'Docker will prevent the deletion', correct: true }
+      - { value: 'The image is forcibly deleted and the container breaks', correct: false }
+      - { value: 'The container is automatically removed', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/image/rm/'
 
   - uuid: 44fc1af8-688b-4a9e-b444-350fd39abfdf
     question: What does `docker image prune` do?
     answers:
-      - { value: "Removes all running containers", correct: false }
-      - { value: "Removes all images", correct: false }
-      - { value: "Deletes unused volumes", correct: false }
-      - { value: "Removes dangling images", correct: true }
+      - { value: 'Removes all running containers', correct: false }
+      - { value: 'Removes all images', correct: false }
+      - { value: 'Deletes unused volumes', correct: false }
+      - { value: 'Removes dangling images', correct: true }
     help: 'https://docs.docker.com/reference/cli/docker/image/prune/'
 
   - uuid: b6f05e8b-3592-42d3-b113-49a6e12d3797
     question: Which command removes all unused images, not just dangling ones?
     answers:
-      - { value: "docker image delete all", correct: false }
-      - { value: "docker image rm --all", correct: false }
-      - { value: "docker image prune -a", correct: true }
-      - { value: "docker image clean", correct: false }
+      - { value: 'docker image delete all', correct: false }
+      - { value: 'docker image rm --all', correct: false }
+      - { value: 'docker image prune -a', correct: true }
+      - { value: 'docker image clean', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/image/prune/'
 
   - uuid: c3574c79-c108-4625-820f-705a3c4e72cb
     question: How can you display the size of each image on disk?
     answers:
-      - { value: "docker disk image", correct: false }
-      - { value: "docker image ls", correct: true }
-      - { value: "docker image info", correct: false }
-      - { value: "docker image stats", correct: false }
+      - { value: 'docker disk image', correct: false }
+      - { value: 'docker image ls', correct: true }
+      - { value: 'docker image info', correct: false }
+      - { value: 'docker image stats', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/image/ls/'
 
   - uuid: 9ea611c5-8f59-4fc5-bdf4-55c3a3e93f7b
     question: What does the `-f` option do in `docker image ls -f dangling=true`?
     answers:
-      - { value: "Fetches image metadata", correct: false }
-      - { value: "Frees space used by the image", correct: false }
-      - { value: "Forces listing even if the image is used", correct: false }
-      - { value: "Filters images by the specified condition", correct: true }
+      - { value: 'Fetches image metadata', correct: false }
+      - { value: 'Frees space used by the image', correct: false }
+      - { value: 'Forces listing even if the image is used', correct: false }
+      - { value: 'Filters images by the specified condition', correct: true }
     help: 'https://docs.docker.com/reference/cli/docker/image/ls/'
 
   - uuid: 5b2ef56c-1f4e-4c3e-b71b-147fc2aab45e
     question: What does the `docker image rm $(docker image ls -q)` command do?
     answers:
-      - { value: "Lists all image IDs", correct: false }
-      - { value: "Deletes all images", correct: true }
-      - { value: "Stops containers", correct: false }
-      - { value: "Creates a backup of images", correct: false }
+      - { value: 'Lists all image IDs', correct: false }
+      - { value: 'Deletes all images', correct: true }
+      - { value: 'Stops containers', correct: false }
+      - { value: 'Creates a backup of images', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/image/rm/'
 
   - uuid: 75f2aa1a-14a8-4b14-9816-bdbbfe58fa13
     question: What is the result of `docker image ls -a`?
     answers:
-      - { value: "Filters for official images only", correct: false }
-      - { value: "Lists only running containers", correct: false }
-      - { value: "Lists all images including intermediate ones", correct: true }
-      - { value: "Shows storage usage", correct: false }
+      - { value: 'Filters for official images only', correct: false }
+      - { value: 'Lists only running containers', correct: false }
+      - { value: 'Lists all images including intermediate ones', correct: true }
+      - { value: 'Shows storage usage', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/image/ls/'
 
   - uuid: 9b07005c-3e6a-4650-a7a6-8e3a3d4071ae
     question: What does 'dangling image' mean in Docker?
     answers:
-      - { value: "An image without a tag (none) and not referenced by any container", correct: true }
-      - { value: "An image with syntax errors", correct: false }
-      - { value: "A container that is stopped", correct: false }
-      - { value: "An image from a deprecated registry", correct: false }
+      - { value: 'An image without a tag (none) and not referenced by any container', correct: true }
+      - { value: 'An image with syntax errors', correct: false }
+      - { value: 'A container that is stopped', correct: false }
+      - { value: 'An image from a deprecated registry', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/image/prune/#description'
 
   - uuid: 588729ad-9a3a-4ff2-a0bb-746a324f497a
     question: What command removes all unused containers, networks, images, and build cache?
     answers:
-      - { value: "docker container prune --all", correct: false }
-      - { value: "docker image prune -a", correct: false }
-      - { value: "docker clean", correct: false }
-      - { value: "docker system prune", correct: true }
+      - { value: 'docker container prune --all', correct: false }
+      - { value: 'docker image prune -a', correct: false }
+      - { value: 'docker clean', correct: false }
+      - { value: 'docker system prune', correct: true }
     help: 'https://docs.docker.com/reference/cli/docker/system/prune/'
 
   - uuid: 90cb0be6-e345-4f2e-a251-b2d2eb1e7072
     question: What is the effect of deleting an image layer that is shared by multiple images?
     answers:
-      - { value: "The layer is compressed", correct: false }
+      - { value: 'The layer is compressed', correct: false }
       - { value: "The layer is kept as long as it's referenced by another image", correct: true }
-      - { value: "The layer is deleted and all images become invalid", correct: false }
-      - { value: "Docker restarts all containers using that image", correct: false }
+      - { value: 'The layer is deleted and all images become invalid', correct: false }
+      - { value: 'Docker restarts all containers using that image', correct: false }
     help: 'https://docs.docker.com/storage/storagedriver/#container-and-layer-lifecycle'
 
   - uuid: c60f97d6-9249-4f6c-8a98-d9c2e194b8df
     question: Which command shows only the image IDs?
     answers:
-      - { value: "docker images --only-id", correct: false }
-      - { value: "docker image ls -q", correct: true }
-      - { value: "docker image inspect all", correct: false }
-      - { value: "docker image show --ids", correct: false }
+      - { value: 'docker images --only-id', correct: false }
+      - { value: 'docker image ls -q', correct: true }
+      - { value: 'docker image inspect all', correct: false }
+      - { value: 'docker image show --ids', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/image/ls/#quiet'
 
   - uuid: c0e08be0-45de-4944-9519-1be0e5bcf87e
     question: Which command is safest for reclaiming space without affecting running containers?
     answers:
-      - { value: "docker image rm $(docker image ls -q)", correct: false }
-      - { value: "docker image rm -f", correct: false }
-      - { value: "docker image prune", correct: true }
-      - { value: "docker system prune -a", correct: false }
+      - { value: 'docker image rm $(docker image ls -q)', correct: false }
+      - { value: 'docker image rm -f', correct: false }
+      - { value: 'docker image prune', correct: true }
+      - { value: 'docker system prune -a', correct: false }
     help: 'https://docs.docker.com/config/pruning/#remove-unused-images'
 
   - uuid: 1fa734c6-c8f3-4fe5-8b1d-f3dd1e7742da
     question: How do you inspect metadata of a specific image?
     answers:
-      - { value: "docker inspect-image <image>", correct: false }
-      - { value: "docker image get <image>", correct: false }
-      - { value: "docker image inspect <image>", correct: true }
-      - { value: "docker image show <image>", correct: false }
+      - { value: 'docker inspect-image <image>', correct: false }
+      - { value: 'docker image get <image>', correct: false }
+      - { value: 'docker image inspect <image>', correct: true }
+      - { value: 'docker image show <image>', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/inspect/'
 
   - uuid: 8d05baf9-8f3d-4fa4-8907-5a4f99e0a4aa
     question: What happens if you run `docker image rm` on an image currently used by a running container?
     answers:
-      - { value: "The image is removed silently", correct: false }
-      - { value: "The command fails with an error", correct: true }
-      - { value: "The container is paused", correct: false }
-      - { value: "The image is deleted and container crashes", correct: false }
+      - { value: 'The image is removed silently', correct: false }
+      - { value: 'The command fails with an error', correct: true }
+      - { value: 'The container is paused', correct: false }
+      - { value: 'The image is deleted and container crashes', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/image/rm/#examples'
 
   - uuid: d28ed9da-b4cb-4a3e-b6ef-7f02a2d3f373
     question: Which Docker command removes all stopped containers, all unused networks, all dangling images, and optionally volumes?
     answers:
-      - { value: "docker prune --all", correct: false }
-      - { value: "docker image prune --all", correct: false }
-      - { value: "docker container prune -a", correct: false }
-      - { value: "docker system prune --volumes", correct: true }
+      - { value: 'docker prune --all', correct: false }
+      - { value: 'docker image prune --all', correct: false }
+      - { value: 'docker container prune -a', correct: false }
+      - { value: 'docker system prune --volumes', correct: true }
     help: 'https://docs.docker.com/reference/cli/docker/system/prune/#remove-volumes'
 
   - uuid: e22a9915-6cd4-4c52-9a7d-e9c3f1d387c2
     question: Why would `docker image prune -a` be considered dangerous in a CI/CD pipeline?
     answers:
-      - { value: "It permanently deletes the Docker daemon", correct: false }
-      - { value: "It removes all unused images, including those without containers", correct: true }
-      - { value: "It logs you out of Docker Hub", correct: false }
-      - { value: "It stops all services running", correct: false }
+      - { value: 'It permanently deletes the Docker daemon', correct: false }
+      - { value: 'It removes all unused images, including those without containers', correct: true }
+      - { value: 'It logs you out of Docker Hub', correct: false }
+      - { value: 'It stops all services running', correct: false }
     help: 'https://docs.docker.com/config/pruning/'
 
diff --git a/data/2_Image_creation_management_registry/describe_demonstrate_registry_functions.yaml b/data/2_Image_creation_management_registry/describe_demonstrate_registry_functions.yaml
index 15f3074..d8696df 100644
--- a/data/2_Image_creation_management_registry/describe_demonstrate_registry_functions.yaml
+++ b/data/2_Image_creation_management_registry/describe_demonstrate_registry_functions.yaml
@@ -2,98 +2,98 @@ questions:
   - uuid: 4f4b2dfc-9c32-4fc3-a377-efc45d2b0121
     question: What is the purpose of a container registry?
     answers:
-      - { value: "To schedule services across a Swarm cluster", correct: false }
-      - { value: "To provide metrics for containers", correct: false }
-      - { value: "To store and distribute Docker images", correct: true }
-      - { value: "To run CI pipelines", correct: false }
+      - { value: 'To schedule services across a Swarm cluster', correct: false }
+      - { value: 'To provide metrics for containers', correct: false }
+      - { value: 'To store and distribute Docker images', correct: true }
+      - { value: 'To run CI pipelines', correct: false }
     help: https://docs.docker.com/get-started/docker-concepts/the-basics/what-is-a-registry/
 
   - uuid: 6bb2bb6f-650e-4f13-b7b7-35f2a7e5dc96
     question: Which command pushes an image to a registry?
     answers:
-      - { value: "docker upload myimage", correct: false }
-      - { value: "docker send myimage", correct: false }
-      - { value: "docker publish myimage", correct: false }
-      - { value: "docker push myimage:latest", correct: true }
+      - { value: 'docker upload myimage', correct: false }
+      - { value: 'docker send myimage', correct: false }
+      - { value: 'docker publish myimage', correct: false }
+      - { value: 'docker push myimage:latest', correct: true }
     help: https://docs.docker.com/reference/cli/docker/image/push/
 
   - uuid: b3c10a9a-12d5-41c4-8a13-bbe3ea61a3ea
     question: What must you do before pushing an image to Docker Hub?
     answers:
-      - { value: "Restart the Docker daemon", correct: false }
-      - { value: "Change network mode", correct: false }
-      - { value: "Tag the image with the registry and repository name", correct: true }
-      - { value: "Delete all containers", correct: false }
+      - { value: 'Restart the Docker daemon', correct: false }
+      - { value: 'Change network mode', correct: false }
+      - { value: 'Tag the image with the registry and repository name', correct: true }
+      - { value: 'Delete all containers', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/tag/
 
   - uuid: 2b1f0f25-1c4a-4347-8e88-01d7e832b963
     question: What does the `docker login` command do?
     answers:
-      - { value: "Launches a container with credentials", correct: false }
-      - { value: "Publishes a container port", correct: false }
-      - { value: "Authenticates to a registry", correct: true }
-      - { value: "Logs into a running container", correct: false }
+      - { value: 'Launches a container with credentials', correct: false }
+      - { value: 'Publishes a container port', correct: false }
+      - { value: 'Authenticates to a registry', correct: true }
+      - { value: 'Logs into a running container', correct: false }
     help: https://docs.docker.com/reference/cli/docker/login/
 
   - uuid: f1b239f2-5354-4995-a21e-b6f3d5c59a63
     question: What is the default registry used when pushing an unqualified image name?
     answers:
-      - { value: "GitHub Container Registry", correct: false }
-      - { value: "Your local registry", correct: false }
-      - { value: "Quay", correct: false }
-      - { value: "Docker Hub (docker.io)", correct: true }
+      - { value: 'GitHub Container Registry', correct: false }
+      - { value: 'Your local registry', correct: false }
+      - { value: 'Quay', correct: false }
+      - { value: 'Docker Hub (docker.io)', correct: true }
     help: https://docs.docker.com/reference/cli/docker/image/push/#default-behavior
 
   - uuid: 27efca82-7d3a-4be0-a60d-dc4979c31f58
     question: How can you search for an image on Docker Hub from the CLI?
     answers:
-      - { value: "docker query nginx", correct: false }
-      - { value: "docker search nginx", correct: true }
-      - { value: "docker discover nginx", correct: false }
-      - { value: "docker list nginx", correct: false }
+      - { value: 'docker query nginx', correct: false }
+      - { value: 'docker search nginx', correct: true }
+      - { value: 'docker discover nginx', correct: false }
+      - { value: 'docker list nginx', correct: false }
     help: https://docs.docker.com/reference/cli/docker/search/
 
   - uuid: 60cb93f5-188e-4cf4-9e7b-04293062f019
     question: What file allows you to run your own Docker registry locally?
     answers:
-      - { value: "A Dockerfile with `FROM registry`", correct: false }
-      - { value: "registry:2 image in a docker-compose file", correct: true }
-      - { value: "A config.json in ~/.docker", correct: false }
-      - { value: "A YAML Compose with alpine", correct: false }
+      - { value: 'A Dockerfile with `FROM registry`', correct: false }
+      - { value: 'registry:2 image in a docker-compose file', correct: true }
+      - { value: 'A config.json in ~/.docker', correct: false }
+      - { value: 'A YAML Compose with alpine', correct: false }
     help: https://docs.docker.com/registry/deploying/
 
   - uuid: d6ebc119-9334-44e0-b49f-76a0ee29f2fa
     question: What environment variable can be used to set a registry credential for non-interactive login?
     answers:
-      - { value: "REGISTRY_SECRET", correct: false }
-      - { value: "AUTH_PASSWORD", correct: false }
-      - { value: "DOCKER_AUTH_TOKEN", correct: false }
-      - { value: "DOCKER_PASSWORD", correct: true }
+      - { value: 'REGISTRY_SECRET', correct: false }
+      - { value: 'AUTH_PASSWORD', correct: false }
+      - { value: 'DOCKER_AUTH_TOKEN', correct: false }
+      - { value: 'DOCKER_PASSWORD', correct: true }
     help: https://docs.docker.com/reference/cli/docker/login/#credentials-store
 
   - uuid: 7dc77e83-04f6-48df-9313-91b857d0e5c7
     question: What is the role of a registry namespace (like `username/imagename`)?
     answers:
-      - { value: "It defines port mapping", correct: false }
-      - { value: "It stores image logs", correct: false }
-      - { value: "It encrypts image layers", correct: false }
-      - { value: "It scopes images per user or org in the registry", correct: true }
+      - { value: 'It defines port mapping', correct: false }
+      - { value: 'It stores image logs', correct: false }
+      - { value: 'It encrypts image layers', correct: false }
+      - { value: 'It scopes images per user or org in the registry', correct: true }
     help: https://docs.docker.com/docker-hub/repos/#repository-namespaces-and-repository-visibility
 
   - uuid: 34719f42-0321-4d5f-b5c2-0b1d676eb3f7
     question: Which of the following can be used to deploy a private registry securely?
     answers:
-      - { value: "Bind to 0.0.0.0 without TLS", correct: false }
-      - { value: "Disable login requirements", correct: false }
-      - { value: "Enable TLS and use authentication plugins", correct: true }
-      - { value: "Share image metadata publicly", correct: false }
+      - { value: 'Bind to 0.0.0.0 without TLS', correct: false }
+      - { value: 'Disable login requirements', correct: false }
+      - { value: 'Enable TLS and use authentication plugins', correct: true }
+      - { value: 'Share image metadata publicly', correct: false }
     help: https://docs.docker.com/registry/deploying/#run-a-local-registry
 
   - uuid: 5a74cb47-217b-4a87-83b7-00d57a21aaf9
     question: What command shows the list of image repositories in your local Docker engine?
     answers:
-      - { value: "docker search", correct: false }
-      - { value: "docker images", correct: true }
-      - { value: "docker rmi", correct: false }
-      - { value: "docker ps -a", correct: false }
+      - { value: 'docker search', correct: false }
+      - { value: 'docker images', correct: true }
+      - { value: 'docker rmi', correct: false }
+      - { value: 'docker ps -a', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/ls/
diff --git a/data/2_Image_creation_management_registry/describe_the_use_of_dockerfile.yaml b/data/2_Image_creation_management_registry/describe_the_use_of_dockerfile.yaml
index 8701e22..aa71b0b 100644
--- a/data/2_Image_creation_management_registry/describe_the_use_of_dockerfile.yaml
+++ b/data/2_Image_creation_management_registry/describe_the_use_of_dockerfile.yaml
@@ -2,39 +2,39 @@ questions:
   - uuid: 8f6f7d34-8c1e-4c96-9222-5b57fc3cc229
     question: What is the main purpose of a Dockerfile?
     answers:
-      - { value: "To deploy containers in Kubernetes", correct: false }
-      - { value: "To configure Docker Hub settings", correct: false }
-      - { value: "To automate image creation using versioned instructions", correct: true }
+      - { value: 'To deploy containers in Kubernetes', correct: false }
+      - { value: 'To configure Docker Hub settings', correct: false }
+      - { value: 'To automate image creation using versioned instructions', correct: true }
     help: https://docs.docker.com/engine/reference/builder/
 
   - uuid: c174e319-85dc-47d2-bde5-fc9482c87212
     question: Why is using a Dockerfile preferable to creating images manually?
     answers:
-      - { value: "It ensures repeatability and automation", correct: true }
-      - { value: "It creates containers instead of images", correct: false }
-      - { value: "It improves image compression", correct: false }
+      - { value: 'It ensures repeatability and automation', correct: true }
+      - { value: 'It creates containers instead of images', correct: false }
+      - { value: 'It improves image compression', correct: false }
     help: https://docs.docker.com/develop/develop-images/dockerfile_best-practices/
 
   - uuid: 1d87b0ec-ecc7-42f2-88d5-5cd193449bfa
     question: What does a Dockerfile define?
     answers:
-      - { value: "The orchestration of services across nodes", correct: false }
-      - { value: "The logging behavior of running containers", correct: false }
-      - { value: "The step-by-step instructions to build a Docker image", correct: true }
+      - { value: 'The orchestration of services across nodes', correct: false }
+      - { value: 'The logging behavior of running containers', correct: false }
+      - { value: 'The step-by-step instructions to build a Docker image', correct: true }
     help: https://docs.docker.com/engine/reference/builder/
 
   - uuid: e7f40412-2c7a-4bfa-9eac-7a5aa7e708f6
     question: How does a Dockerfile help with CI/CD pipelines?
     answers:
-      - { value: "It deploys applications to production automatically", correct: false }
-      - { value: "It enables consistent image builds across environments", correct: true }
-      - { value: "It replaces the Docker daemon configuration", correct: false }
+      - { value: 'It deploys applications to production automatically', correct: false }
+      - { value: 'It enables consistent image builds across environments', correct: true }
+      - { value: 'It replaces the Docker daemon configuration', correct: false }
     help: https://docs.docker.com/build/ci/
 
   - uuid: 3c5fbd4f-cf77-46a3-a8a4-063408c5f9b3
     question: Which of the following best describes a Dockerfile?
     answers:
-      - { value: "A volume definition file for persistent storage", correct: false }
-      - { value: "A text file containing image build instructions", correct: true }
-      - { value: "A binary image used to start containers", correct: false }
+      - { value: 'A volume definition file for persistent storage', correct: false }
+      - { value: 'A text file containing image build instructions', correct: true }
+      - { value: 'A binary image used to start containers', correct: false }
     help: https://docs.docker.com/engine/reference/builder/
diff --git a/data/2_Image_creation_management_registry/display_layers.yaml b/data/2_Image_creation_management_registry/display_layers.yaml
index 38065be..a2a0eb1 100644
--- a/data/2_Image_creation_management_registry/display_layers.yaml
+++ b/data/2_Image_creation_management_registry/display_layers.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: 4a7e2f3b-81d3-4fcf-b3d7-4cfe6b8f0421
     question: Which command displays the layers of a Docker image in a human-readable format?
     answers:
-      - { value: "docker layers nginx", correct: false }
-      - { value: "docker history nginx", correct: true }
-      - { value: "docker inspect nginx", correct: false }
-      - { value: "docker image ls nginx", correct: false }
+      - { value: 'docker layers nginx', correct: false }
+      - { value: 'docker history nginx', correct: true }
+      - { value: 'docker inspect nginx', correct: false }
+      - { value: 'docker image ls nginx', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/history/
 
   - uuid: 1dcb4a0f-1a58-4b25-9469-7c4c91480f9f
     question: Which 'docker history' option shows the cumulative size of image layers?
     answers:
-      - { value: "--quiet", correct: false }
-      - { value: "--format", correct: false }
-      - { value: "--human", correct: true }
-      - { value: "--no-trunc", correct: false }
+      - { value: '--quiet', correct: false }
+      - { value: '--format', correct: false }
+      - { value: '--human', correct: true }
+      - { value: '--no-trunc', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/history/
 
   - uuid: 85dd16f7-d749-4132-9359-30c61d9bcd45
     question: What is the typical output of the command 'docker history nginx'?
     answers:
-      - { value: "The network dependency tree", correct: false }
-      - { value: "The image layers with their sizes and instructions", correct: true }
-      - { value: "A list of all containers using the image", correct: false }
-      - { value: "The complete Dockerfile", correct: false }
+      - { value: 'The network dependency tree', correct: false }
+      - { value: 'The image layers with their sizes and instructions', correct: true }
+      - { value: 'A list of all containers using the image', correct: false }
+      - { value: 'The complete Dockerfile', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/history/
 
   - uuid: f5be1c84-0cb2-41ea-a37f-6d36e460c5d5
     question: Which JSON command can be used to extract the IDs of an image's layers?
     answers:
-      - { value: "docker image ls --format=`{{.Layers}}` nginx", correct: false }
-      - { value: "docker history --format=`{{.ID}}` nginx", correct: false }
-      - { value: "docker image layers --json nginx", correct: false }
-      - { value: "docker inspect --format=`{{json .RootFS.Layers}}` nginx", correct: true }
+      - { value: 'docker image ls --format=`{{.Layers}}` nginx', correct: false }
+      - { value: 'docker history --format=`{{.ID}}` nginx', correct: false }
+      - { value: 'docker image layers --json nginx', correct: false }
+      - { value: 'docker inspect --format=`{{json .RootFS.Layers}}` nginx', correct: true }
     help: https://docs.docker.com/engine/reference/commandline/inspect/
 
   - uuid: 4c92d4dc-9c2f-4081-a324-32a43a7f1ff9
     question: What is the purpose of the 'docker history' command in the context of a security investigation?
     answers:
-      - { value: "To view container logs", correct: false }
-      - { value: "To change permissions on volumes", correct: false }
-      - { value: "To detect suspicious instructions in the image layers", correct: true }
-      - { value: "To check the current memory usage of the container", correct: false }
+      - { value: 'To view container logs', correct: false }
+      - { value: 'To change permissions on volumes', correct: false }
+      - { value: 'To detect suspicious instructions in the image layers', correct: true }
+      - { value: 'To check the current memory usage of the container', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/history/
 
   - uuid: b3c3aabe-6844-4c0e-9015-35486d00d93f
     question: Which field returned by 'docker history' identifies the Dockerfile instruction associated with a layer?
     answers:
-      - { value: "SIZE", correct: false }
-      - { value: "CREATED BY", correct: true }
-      - { value: "IMAGE", correct: false }
-      - { value: "CONTAINER", correct: false }
+      - { value: 'SIZE', correct: false }
+      - { value: 'CREATED BY', correct: true }
+      - { value: 'IMAGE', correct: false }
+      - { value: 'CONTAINER', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/history/
 
   - uuid: c8ec2e1a-88bb-4f5f-a8c1-c3e978eb84da
     question: Why do some lines in 'docker history' show the SIZE column as 0B?
     answers:
-      - { value: "The layer was not built", correct: false }
-      - { value: "The command failed", correct: false }
-      - { value: "The associated instruction does not modify the filesystem", correct: true }
-      - { value: "The image has not been pushed to a registry", correct: false }
+      - { value: 'The layer was not built', correct: false }
+      - { value: 'The command failed', correct: false }
+      - { value: 'The associated instruction does not modify the filesystem', correct: true }
+      - { value: 'The image has not been pushed to a registry', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/history/
 
   - uuid: 1b82ad23-5f91-4e9d-9189-f503b1a2e156
     question: What is the best way to visualize the layers of an image with the exact commands used to generate them?
     answers:
-      - { value: "docker history --no-trunc nginx", correct: true }
-      - { value: "docker ps -a", correct: false }
-      - { value: "docker image inspect", correct: false }
-      - { value: "docker diff", correct: false }
+      - { value: 'docker history --no-trunc nginx', correct: true }
+      - { value: 'docker ps -a', correct: false }
+      - { value: 'docker image inspect', correct: false }
+      - { value: 'docker diff', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/history/
 
   - uuid: cdc2fd95-fb2b-4b6c-8352-b453327cf98e
     question: What is the main purpose of analyzing the layers of a Docker image?
     answers:
-      - { value: "To force the update of private registries", correct: false }
-      - { value: "To restart the image with another UID", correct: false }
-      - { value: "To understand how the image was built and optimize its size", correct: true }
-      - { value: "To create a new network interface", correct: false }
+      - { value: 'To force the update of private registries', correct: false }
+      - { value: 'To restart the image with another UID', correct: false }
+      - { value: 'To understand how the image was built and optimize its size', correct: true }
+      - { value: 'To create a new network interface', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/history/
 
   - uuid: 5bb4ad26-91f1-497a-b930-ec38f74aa244
     question: What happens if you run 'docker history' on an intermediate image?
     answers:
-      - { value: "It only shows the final layer", correct: false }
-      - { value: "It shows all the layers up to that intermediate image", correct: true }
-      - { value: "It returns an error", correct: false }
-      - { value: "It lists currently running containers", correct: false }
+      - { value: 'It only shows the final layer', correct: false }
+      - { value: 'It shows all the layers up to that intermediate image', correct: true }
+      - { value: 'It returns an error', correct: false }
+      - { value: 'It lists currently running containers', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/history/
diff --git a/data/2_Image_creation_management_registry/identify_display_main_parts_dockerfile.yaml b/data/2_Image_creation_management_registry/identify_display_main_parts_dockerfile.yaml
index 555b868..60720f6 100644
--- a/data/2_Image_creation_management_registry/identify_display_main_parts_dockerfile.yaml
+++ b/data/2_Image_creation_management_registry/identify_display_main_parts_dockerfile.yaml
@@ -2,97 +2,97 @@ questions:
   - uuid: e3c6e221-6230-49c6-8c96-c626313df321
     question: Which Dockerfile instruction allows conditional execution by leveraging build arguments?
     answers:
-      - { value: "ENV", correct: false }
-      - { value: "ARG", correct: true }
-      - { value: "LABEL", correct: false }
-      - { value: "CMD", correct: false }
+      - { value: 'ENV', correct: false }
+      - { value: 'ARG', correct: true }
+      - { value: 'LABEL', correct: false }
+      - { value: 'CMD', correct: false }
     help: https://docs.docker.com/engine/reference/builder/#arg
 
   - uuid: 3dc09cd3-1a31-4bd4-8267-b4fcdd7a96e1
     question: What happens when multiple ENV instructions are used in a Dockerfile?
     answers:
-      - { value: "Variables set earlier are reset", correct: false }
-      - { value: "ENV cannot be used more than once", correct: false }
-      - { value: "Only the last ENV instruction is preserved", correct: false }
-      - { value: "Each ENV instruction creates a new layer and persists environment variables", correct: true }
+      - { value: 'Variables set earlier are reset', correct: false }
+      - { value: 'ENV cannot be used more than once', correct: false }
+      - { value: 'Only the last ENV instruction is preserved', correct: false }
+      - { value: 'Each ENV instruction creates a new layer and persists environment variables', correct: true }
     help: https://docs.docker.com/engine/reference/builder/#env
 
   - uuid: ccc29520-d0aa-4f97-982e-2095cb9794dc
     question: What is the function of the SHELL instruction in a Dockerfile?
     answers:
-      - { value: "It changes the base image shell", correct: false }
-      - { value: "It defines the default shell to use for RUN instructions", correct: true }
-      - { value: "It launches a shell session inside the container", correct: false }
-      - { value: "It is used to execute CMD commands", correct: false }
+      - { value: 'It changes the base image shell', correct: false }
+      - { value: 'It defines the default shell to use for RUN instructions', correct: true }
+      - { value: 'It launches a shell session inside the container', correct: false }
+      - { value: 'It is used to execute CMD commands', correct: false }
     help: https://docs.docker.com/engine/reference/builder/#shell
 
   - uuid: a6633557-3d18-4a80-8c6c-2ce3f4101d58
     question: Which instruction is used to document metadata about the image?
     answers:
-      - { value: "ARG", correct: false }
-      - { value: "EXPOSE", correct: false }
-      - { value: "ENV", correct: false }
-      - { value: "LABEL", correct: true }
+      - { value: 'ARG', correct: false }
+      - { value: 'EXPOSE', correct: false }
+      - { value: 'ENV', correct: false }
+      - { value: 'LABEL', correct: true }
     help: https://docs.docker.com/engine/reference/builder/#label
 
   - uuid: 67c13770-2fa6-4fc5-bf10-8dd7f0719f1f
     question: In which Dockerfile instruction would you define a non-cached value during build time?
     answers:
-      - { value: "ENV", correct: false }
-      - { value: "ARG", correct: true }
-      - { value: "VOLUME", correct: false }
-      - { value: "RUN", correct: false }
+      - { value: 'ENV', correct: false }
+      - { value: 'ARG', correct: true }
+      - { value: 'VOLUME', correct: false }
+      - { value: 'RUN', correct: false }
     help: https://docs.docker.com/engine/reference/builder/#arg
 
   - uuid: 58f30ff7-8005-4eb2-98f2-207a37d8c9f1
     question: Which instruction in a Dockerfile does not produce a layer in the image?
     answers:
-      - { value: "ARG", correct: true }
-      - { value: "RUN", correct: false }
-      - { value: "COPY", correct: false }
-      - { value: "ENV", correct: false }
+      - { value: 'ARG', correct: true }
+      - { value: 'RUN', correct: false }
+      - { value: 'COPY', correct: false }
+      - { value: 'ENV', correct: false }
     help: https://docs.docker.com/engine/reference/builder/#arg
 
   - uuid: 80b7a1d5-bd9b-4ae7-9bd4-b77aeb314eb1
     question: What is the impact of layer ordering in Dockerfile instructions?
     answers:
-      - { value: "Changing earlier instructions invalidates all subsequent layers", correct: true }
-      - { value: "Docker always rebuilds from scratch regardless of changes", correct: false }
-      - { value: "Only COPY and ADD affect layer cache", correct: false }
-      - { value: "The order of layers is optimized automatically", correct: false }
+      - { value: 'Changing earlier instructions invalidates all subsequent layers', correct: true }
+      - { value: 'Docker always rebuilds from scratch regardless of changes', correct: false }
+      - { value: 'Only COPY and ADD affect layer cache', correct: false }
+      - { value: 'The order of layers is optimized automatically', correct: false }
     help: https://docs.docker.com/develop/develop-images/dockerfile_best-practices/#leverage-build-cache
 
   - uuid: 4e3dc9c7-d59f-4291-925f-31823c4988b0
     question: What does VOLUME in a Dockerfile do?
     answers:
-      - { value: "Informs Docker that the specified path should be persisted and possibly shared", correct: true }
-      - { value: "Creates a read-only directory", correct: false }
-      - { value: "Automatically mounts the volume on all containers", correct: false }
-      - { value: "Mounts the host directory into the image at build time", correct: false }
+      - { value: 'Informs Docker that the specified path should be persisted and possibly shared', correct: true }
+      - { value: 'Creates a read-only directory', correct: false }
+      - { value: 'Automatically mounts the volume on all containers', correct: false }
+      - { value: 'Mounts the host directory into the image at build time', correct: false }
     help: https://docs.docker.com/engine/reference/builder/#volume
 
   - uuid: ae0e5e55-4745-47c5-b6b8-feb2726d1d13
     question: What happens if multiple WORKDIR instructions are used?
     answers:
-      - { value: "Only the last WORKDIR is used during the build", correct: false }
-      - { value: "WORKDIR must be unique in the Dockerfile", correct: false }
-      - { value: "Docker throws an error if WORKDIR is redefined", correct: false }
-      - { value: "Each subsequent WORKDIR is relative to the previous one if not absolute", correct: true }
+      - { value: 'Only the last WORKDIR is used during the build', correct: false }
+      - { value: 'WORKDIR must be unique in the Dockerfile', correct: false }
+      - { value: 'Docker throws an error if WORKDIR is redefined', correct: false }
+      - { value: 'Each subsequent WORKDIR is relative to the previous one if not absolute', correct: true }
     help: https://docs.docker.com/engine/reference/builder/#workdir
 
   - uuid: 65d7644f-e2b5-4602-bf08-25f4df38e34f
     question: What is a best practice when writing RUN instructions?
     answers:
-      - { value: "Each RUN should install only one package", correct: false }
-      - { value: "RUN should be avoided in favor of CMD", correct: false }
-      - { value: "Chain commands using && to minimize layers", correct: true }
-      - { value: "Use multiple RUN instructions for clarity", correct: false }
+      - { value: 'Each RUN should install only one package', correct: false }
+      - { value: 'RUN should be avoided in favor of CMD', correct: false }
+      - { value: 'Chain commands using && to minimize layers', correct: true }
+      - { value: 'Use multiple RUN instructions for clarity', correct: false }
     help: https://docs.docker.com/develop/develop-images/dockerfile_best-practices/#run
   - uuid: 9e553a15-41f6-4f91-a930-58cf52d1a0a6
     question: What is the main role of the `.dockerignore` file during a Docker build?
     answers:
-      - { value: "To configure environment variables used in the Dockerfile", correct: false }
-      - { value: "To prevent Docker from caching image layers", correct: false }
-      - { value: "To define multi-stage build targets", correct: false }
-      - { value: "To exclude files from the build context before sending it to the Docker daemon", correct: true }
+      - { value: 'To configure environment variables used in the Dockerfile', correct: false }
+      - { value: 'To prevent Docker from caching image layers', correct: false }
+      - { value: 'To define multi-stage build targets', correct: false }
+      - { value: 'To exclude files from the build context before sending it to the Docker daemon', correct: true }
     help: https://docs.docker.com/engine/reference/builder/#dockerignore-file
diff --git a/data/2_Image_creation_management_registry/log_into_a_registry.yaml b/data/2_Image_creation_management_registry/log_into_a_registry.yaml
index 264674d..9e197b4 100644
--- a/data/2_Image_creation_management_registry/log_into_a_registry.yaml
+++ b/data/2_Image_creation_management_registry/log_into_a_registry.yaml
@@ -2,179 +2,179 @@ questions:
   - uuid: a15dbf5a-eec0-4f0f-98c4-5be9a8f1e22c
     question: What command is used to authenticate to a Docker registry?
     answers:
-      - { value: "docker auth", correct: false }
-      - { value: "docker signin", correct: false }
-      - { value: "docker connect", correct: false }
-      - { value: "docker login", correct: true }
+      - { value: 'docker auth', correct: false }
+      - { value: 'docker signin', correct: false }
+      - { value: 'docker connect', correct: false }
+      - { value: 'docker login', correct: true }
     help: https://docs.docker.com/reference/cli/docker/login/
 
   - uuid: 273b4e98-2bc7-4f64-a09c-8a5f63be9911
     question: What is the default Docker registry when no registry is specified?
     answers:
-      - { value: "Quay.io", correct: false }
-      - { value: "Docker Hub", correct: true }
-      - { value: "Harbor", correct: false }
-      - { value: "Amazon ECR", correct: false }
+      - { value: 'Quay.io', correct: false }
+      - { value: 'Docker Hub', correct: true }
+      - { value: 'Harbor', correct: false }
+      - { value: 'Amazon ECR', correct: false }
     help: https://docs.docker.com/docker-hub/
 
   - uuid: 46c6c189-15f9-44fd-8f39-d08a9b6a9ac6
     question: Where are Docker credentials stored by default on Linux systems?
     answers:
-      - { value: "~/.docker/config.json", correct: true }
-      - { value: "~/.docker/auth.json", correct: false }
-      - { value: "/etc/docker/registry.yml", correct: false }
-      - { value: "~/.docker/credentials.yml", correct: false }
+      - { value: '~/.docker/config.json', correct: true }
+      - { value: '~/.docker/auth.json', correct: false }
+      - { value: '/etc/docker/registry.yml', correct: false }
+      - { value: '~/.docker/credentials.yml', correct: false }
     help: https://docs.docker.com/reference/cli/docker/login/#credentials-store
 
   - uuid: bfa24e9f-3502-42cb-b2d7-b0f59de04f8d
     question: Which file contains the base64-encoded credentials after running docker login?
     answers:
-      - { value: "auth.json", correct: false }
-      - { value: "registry.json", correct: false }
-      - { value: "secrets.json", correct: false }
-      - { value: "config.json", correct: true }
+      - { value: 'auth.json', correct: false }
+      - { value: 'registry.json', correct: false }
+      - { value: 'secrets.json', correct: false }
+      - { value: 'config.json', correct: true }
     help: https://docs.docker.com/reference/cli/docker/login/#credentials-store
 
   - uuid: 8fba6f2a-e1ad-48b3-9a3e-2cc3b0d05dc2
     question: What option allows you to specify a custom registry when using `docker login`?
     answers:
-      - { value: "docker login --target myregistry.io", correct: false }
-      - { value: "docker login --registry myregistry.io", correct: false }
-      - { value: "docker login -r myregistry.io", correct: false }
-      - { value: "docker login myregistry.io", correct: true }
+      - { value: 'docker login --target myregistry.io', correct: false }
+      - { value: 'docker login --registry myregistry.io', correct: false }
+      - { value: 'docker login -r myregistry.io', correct: false }
+      - { value: 'docker login myregistry.io', correct: true }
     help: https://docs.docker.com/reference/cli/docker/login/
 
   - uuid: c1f65931-bdb9-4437-b292-c6d4f02fa5f1
     question: Which of the following is a private container registry service?
     answers:
-      - { value: "Alpine Linux", correct: false }
-      - { value: "VS Code", correct: false }
-      - { value: "Docker Desktop", correct: false }
-      - { value: "Amazon ECR", correct: true }
+      - { value: 'Alpine Linux', correct: false }
+      - { value: 'VS Code', correct: false }
+      - { value: 'Docker Desktop', correct: false }
+      - { value: 'Amazon ECR', correct: true }
     help: https://docs.docker.com/reference/cli/docker/login/
 
   - uuid: 65243d7e-bb1a-4e56-a528-e1b0b946305c
     question: How do you log into AWS ECR via Docker CLI?
     answers:
-      - { value: "aws ecr get-login-password | docker login --username AWS --password-stdin <aws_account_id>.dkr.ecr.<region>.amazonaws.com", correct: true }
-      - { value: "aws login --docker", correct: false }
-      - { value: "docker login ecr", correct: false }
-      - { value: "docker login --ecr-credentials", correct: false }
+      - { value: 'aws ecr get-login-password | docker login --username AWS --password-stdin <aws_account_id>.dkr.ecr.<region>.amazonaws.com', correct: true }
+      - { value: 'aws login --docker', correct: false }
+      - { value: 'docker login ecr', correct: false }
+      - { value: 'docker login --ecr-credentials', correct: false }
     help: https://docs.aws.amazon.com/AmazonECR/latest/userguide/registry_auth.html
 
   - uuid: 16510ab2-2053-487f-951b-f8d631c15e8e
     question: What does Docker return after a successful login?
     answers:
-      - { value: "Login Succeeded", correct: true }
-      - { value: "Access Granted", correct: false }
-      - { value: "Authenticated", correct: false }
-      - { value: "200 OK", correct: false }
+      - { value: 'Login Succeeded', correct: true }
+      - { value: 'Access Granted', correct: false }
+      - { value: 'Authenticated', correct: false }
+      - { value: '200 OK', correct: false }
     help: https://docs.docker.com/reference/cli/docker/login/
 
   - uuid: 356b270a-0bc2-4b4a-8dbe-b8cf236063f5
     question: What command logs you out from a registry?
     answers:
-      - { value: "docker unlogin", correct: false }
-      - { value: "docker logout", correct: true }
-      - { value: "docker disconnect", correct: false }
-      - { value: "docker signout", correct: false }
+      - { value: 'docker unlogin', correct: false }
+      - { value: 'docker logout', correct: true }
+      - { value: 'docker disconnect', correct: false }
+      - { value: 'docker signout', correct: false }
     help: https://docs.docker.com/reference/cli/docker/login/
 
   - uuid: d1cd4f6f-6f11-4a39-a215-116e1d10c4d4
     question: If you omit a registry in docker login, which registry is used?
     answers:
-      - { value: "GitHub Container Registry", correct: false }
-      - { value: "Docker Hub", correct: true }
-      - { value: "The last used registry", correct: false }
-      - { value: "A local registry", correct: false }
+      - { value: 'GitHub Container Registry', correct: false }
+      - { value: 'Docker Hub', correct: true }
+      - { value: 'The last used registry', correct: false }
+      - { value: 'A local registry', correct: false }
     help: https://docs.docker.com/reference/cli/docker/login/
 
   - uuid: 35a72e70-3555-4fd5-8548-efef91b437b2
     question: What flag should you use to avoid typing your password in the terminal?
     answers:
-      - { value: "--no-echo", correct: false }
-      - { value: "--stdin-pass", correct: false }
-      - { value: "--secure-auth", correct: false }
-      - { value: "--password-stdin", correct: true }
+      - { value: '--no-echo', correct: false }
+      - { value: '--stdin-pass', correct: false }
+      - { value: '--secure-auth', correct: false }
+      - { value: '--password-stdin', correct: true }
     help: https://docs.docker.com/reference/cli/docker/login/
 
   - uuid: 4b9ac1b7-4dc7-4476-80fc-c7e8f05c38c2
     question: Which of the following registries supports anonymous pull by default?
     answers:
-      - { value: "Amazon ECR", correct: false }
-      - { value: "Docker Hub", correct: true }
-      - { value: "Azure Container Registry", correct: false }
-      - { value: "GitHub Container Registry", correct: false }
+      - { value: 'Amazon ECR', correct: false }
+      - { value: 'Docker Hub', correct: true }
+      - { value: 'Azure Container Registry', correct: false }
+      - { value: 'GitHub Container Registry', correct: false }
     help: https://docs.docker.com/reference/cli/docker/login/
 
   - uuid: b3f9fdd1-e0ef-4aa4-aec4-2b5b3f95b2d3
     question: What is the risk of checking `~/.docker/config.json` into version control?
     answers:
-      - { value: "It may contain base64-encoded credentials", correct: true }
-      - { value: "It can crash the Docker CLI", correct: false }
-      - { value: "It corrupts the local registry", correct: false }
-      - { value: "It disables image pushes", correct: false }
+      - { value: 'It may contain base64-encoded credentials', correct: true }
+      - { value: 'It can crash the Docker CLI', correct: false }
+      - { value: 'It corrupts the local registry', correct: false }
+      - { value: 'It disables image pushes', correct: false }
     help: https://docs.docker.com/reference/cli/docker/login/
 
   - uuid: 3aaf0c2c-94dc-46ae-82c9-5f26a497ce3b
     question: Can `docker login` be used in CI pipelines?
     answers:
-      - { value: "Yes, using --password-stdin", correct: true }
-      - { value: "No, it only works interactively", correct: false }
-      - { value: "Only with GitHub Actions", correct: false }
-      - { value: "Only with SSH keys", correct: false }
+      - { value: 'Yes, using --password-stdin', correct: true }
+      - { value: 'No, it only works interactively', correct: false }
+      - { value: 'Only with GitHub Actions', correct: false }
+      - { value: 'Only with SSH keys', correct: false }
     help: https://docs.docker.com/reference/cli/docker/login/
 
   - uuid: 777d64b4-9b7c-4fa2-90c2-60c5ee7e3c2f
     question: What does the Docker Engine use to authenticate with a registry after login?
     answers:
-      - { value: "A running background process", correct: false }
-      - { value: "TLS mutual authentication", correct: false }
-      - { value: "SSH certificate", correct: false }
-      - { value: "A stored token in config.json", correct: true }
+      - { value: 'A running background process', correct: false }
+      - { value: 'TLS mutual authentication', correct: false }
+      - { value: 'SSH certificate', correct: false }
+      - { value: 'A stored token in config.json', correct: true }
     help: https://docs.docker.com/reference/cli/docker/login/
 
   - uuid: 1aa0e409-e659-46a6-b1cc-7b5c37935411
     question: What is the correct command to authenticate with a private registry at myregistry.local?
     answers:
-      - { value: "docker login --host myregistry.local", correct: false }
-      - { value: "docker login myregistry.local", correct: true }
-      - { value: "docker connect myregistry.local", correct: false }
-      - { value: "docker login --registry myregistry.local", correct: false }
+      - { value: 'docker login --host myregistry.local', correct: false }
+      - { value: 'docker login myregistry.local', correct: true }
+      - { value: 'docker connect myregistry.local', correct: false }
+      - { value: 'docker login --registry myregistry.local', correct: false }
     help: https://docs.docker.com/reference/cli/docker/login/
 
   - uuid: 13a6612f-b3d3-4210-b77f-39588c39f353
     question: What should you do before pushing an image to Docker Hub?
     answers:
-      - { value: "Restart the Docker daemon", correct: false }
-      - { value: "Export the image to tar first", correct: false }
-      - { value: "Login using docker login", correct: true }
-      - { value: "Run docker pull", correct: false }
+      - { value: 'Restart the Docker daemon', correct: false }
+      - { value: 'Export the image to tar first', correct: false }
+      - { value: 'Login using docker login', correct: true }
+      - { value: 'Run docker pull', correct: false }
     help: https://docs.docker.com/reference/cli/docker/login/
 
   - uuid: d95e82c4-d361-420f-9d97-b5eb09c09cf1
     question: What happens if docker login fails?
     answers:
-      - { value: "An error message is displayed and authentication fails", correct: true }
-      - { value: "Docker retries silently in the background", correct: false }
-      - { value: "A prompt to try again appears", correct: false }
-      - { value: "The system attempts offline mode", correct: false }
+      - { value: 'An error message is displayed and authentication fails', correct: true }
+      - { value: 'Docker retries silently in the background', correct: false }
+      - { value: 'A prompt to try again appears', correct: false }
+      - { value: 'The system attempts offline mode', correct: false }
     help: https://docs.docker.com/reference/cli/docker/login/
 
   - uuid: b0c38b0e-290f-44a2-bc42-0a6a52e8823c
     question: What authentication method does Docker login use with Docker Hub?
     answers:
-      - { value: "JWT tokens only", correct: false }
-      - { value: "SSH challenge-response", correct: false }
-      - { value: "OAuth 2.0", correct: false }
-      - { value: "Basic authentication (username/password)", correct: true }
+      - { value: 'JWT tokens only', correct: false }
+      - { value: 'SSH challenge-response', correct: false }
+      - { value: 'OAuth 2.0', correct: false }
+      - { value: 'Basic authentication (username/password)', correct: true }
     help: https://docs.docker.com/reference/cli/docker/login/
 
   - uuid: f6ea0aa0-5a3b-46e5-bf8a-140bfda4a7c6
     question: How can a user revoke a previously saved Docker login token?
     answers:
-      - { value: "Restart the host machine", correct: false }
-      - { value: "Logout from Docker Desktop", correct: false }
-      - { value: "Remove the entry from ~/.docker/config.json", correct: true }
-      - { value: "Clear all Docker system cache", correct: false }
+      - { value: 'Restart the host machine', correct: false }
+      - { value: 'Logout from Docker Desktop', correct: false }
+      - { value: 'Remove the entry from ~/.docker/config.json', correct: true }
+      - { value: 'Clear all Docker system cache', correct: false }
     help: https://docs.docker.com/reference/cli/docker/login/
diff --git a/data/2_Image_creation_management_registry/pull_delete_images_registry.yaml b/data/2_Image_creation_management_registry/pull_delete_images_registry.yaml
index 20b4e11..1385366 100644
--- a/data/2_Image_creation_management_registry/pull_delete_images_registry.yaml
+++ b/data/2_Image_creation_management_registry/pull_delete_images_registry.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: a9c74084-739f-4c80-9a12-1132a5f64403
     question: What is the default registry Docker pulls from when no registry is specified?
     answers:
-      - { value: "GitHub Container Registry", correct: false }
-      - { value: "Docker Hub", correct: true }
-      - { value: "Quay.io", correct: false }
-      - { value: "Google Container Registry", correct: false }
+      - { value: 'GitHub Container Registry', correct: false }
+      - { value: 'Docker Hub', correct: true }
+      - { value: 'Quay.io', correct: false }
+      - { value: 'Google Container Registry', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/image/pull/'
 
   - uuid: b45f85d1-e45e-4e77-9a7e-fce06b165b9a
     question: Which command is used to pull an image from a private registry?
     answers:
-      - { value: "docker get myimage", correct: false }
-      - { value: "docker pull myregistry.example.com/myimage:latest", correct: true }
-      - { value: "docker clone myimage", correct: false }
-      - { value: "docker fetch myregistry.example.com/myimage", correct: false }
+      - { value: 'docker get myimage', correct: false }
+      - { value: 'docker pull myregistry.example.com/myimage:latest', correct: true }
+      - { value: 'docker clone myimage', correct: false }
+      - { value: 'docker fetch myregistry.example.com/myimage', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/image/pull/'
 
   - uuid: 7a061937-e373-4f3e-8c90-3d2c0ce28c61
     question: What happens if you run `docker pull nginx` twice?
     answers:
-      - { value: "Docker downloads the image again regardless", correct: false }
-      - { value: "Docker throws an error", correct: false }
-      - { value: "Docker checks the local cache and only pulls if the image has changed", correct: true }
-      - { value: "Docker deletes the local image and replaces it", correct: false }
+      - { value: 'Docker downloads the image again regardless', correct: false }
+      - { value: 'Docker throws an error', correct: false }
+      - { value: 'Docker checks the local cache and only pulls if the image has changed', correct: true }
+      - { value: 'Docker deletes the local image and replaces it', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/image/pull/'
 
   - uuid: a2efcb95-f9ce-49c5-bf79-5b3e58ef50e6
     question: Which command removes an image from your local machine?
     answers:
-      - { value: "docker delete myimage", correct: false }
-      - { value: "docker image delete myimage", correct: false }
-      - { value: "docker rmi --remote myimage", correct: false }
-      - { value: "docker image rm myimage:tag", correct: true }
+      - { value: 'docker delete myimage', correct: false }
+      - { value: 'docker image delete myimage', correct: false }
+      - { value: 'docker rmi --remote myimage', correct: false }
+      - { value: 'docker image rm myimage:tag', correct: true }
     help: 'https://docs.docker.com/reference/cli/docker/image/rm/'
 
   - uuid: f4df88a0-c1f7-4c9d-bd0e-e2ad3ad66aa7
     question: Can `docker rmi` delete an image that is currently being used by a running container?
     answers:
-      - { value: "Only if using the `--force` flag", correct: false }
-      - { value: "No, you must stop and remove the container first", correct: true }
-      - { value: "Yes, but the container will crash", correct: false }
-      - { value: "Yes, the image will be removed anyway", correct: false }
+      - { value: 'Only if using the `--force` flag', correct: false }
+      - { value: 'No, you must stop and remove the container first', correct: true }
+      - { value: 'Yes, but the container will crash', correct: false }
+      - { value: 'Yes, the image will be removed anyway', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/image/rm/'
 
   - uuid: 9d9e87cc-69ed-4ad5-93c7-9e4d78a26a2f
     question: Which command pulls all tags of an image?
     answers:
-      - { value: "docker pull nginx --all", correct: false }
-      - { value: "docker image pull-all nginx", correct: false }
-      - { value: "docker pull --all-tags nginx", correct: true }
-      - { value: "docker pull -a nginx", correct: false }
+      - { value: 'docker pull nginx --all', correct: false }
+      - { value: 'docker image pull-all nginx', correct: false }
+      - { value: 'docker pull --all-tags nginx', correct: true }
+      - { value: 'docker pull -a nginx', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/image/pull/#options'
 
   - uuid: 79c7dc5e-2878-4b61-9e32-9c7f7ff9694a
     question: What does `docker image prune` do?
     answers:
-      - { value: "Pulls latest images from the registry", correct: false }
-      - { value: "Removes unused images not associated with a container", correct: true }
-      - { value: "Deletes all images", correct: false }
-      - { value: "Removes only dangling images used by stopped containers", correct: false }
+      - { value: 'Pulls latest images from the registry', correct: false }
+      - { value: 'Removes unused images not associated with a container', correct: true }
+      - { value: 'Deletes all images', correct: false }
+      - { value: 'Removes only dangling images used by stopped containers', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/image/prune/'
 
   - uuid: d50edb41-90f3-4bcd-86c2-1443fd9989e0
     question: What error occurs if you try to pull from a private registry without being logged in?
     answers:
-      - { value: "Error response from daemon: unauthorized", correct: true }
-      - { value: "Image not found", correct: false }
-      - { value: "Unable to resolve registry DNS", correct: false }
-      - { value: "Access denied by firewall", correct: false }
+      - { value: 'Error response from daemon: unauthorized', correct: true }
+      - { value: 'Image not found', correct: false }
+      - { value: 'Unable to resolve registry DNS', correct: false }
+      - { value: 'Access denied by firewall', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/login/'
 
   - uuid: 19bb913c-1123-499a-bf1d-9f5c6c6a9447
     question: What is the purpose of `docker logout`?
     answers:
-      - { value: "Deletes remote registry images", correct: false }
-      - { value: "Removes authentication credentials from local config", correct: true }
-      - { value: "Logs out of the Docker daemon", correct: false }
-      - { value: "Stops access to Docker CLI", correct: false }
+      - { value: 'Deletes remote registry images', correct: false }
+      - { value: 'Removes authentication credentials from local config', correct: true }
+      - { value: 'Logs out of the Docker daemon', correct: false }
+      - { value: 'Stops access to Docker CLI', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/logout/'
 
   - uuid: 648e6ce6-b215-45fd-91f0-909c79d8bba2
     question: Which command lists all locally available images?
     answers:
-      - { value: "docker ps --images", correct: false }
-      - { value: "docker image list-all", correct: false }
-      - { value: "docker list images", correct: false }
-      - { value: "docker images", correct: true }
+      - { value: 'docker ps --images', correct: false }
+      - { value: 'docker image list-all', correct: false }
+      - { value: 'docker list images', correct: false }
+      - { value: 'docker images', correct: true }
     help: 'https://docs.docker.com/reference/cli/docker/image/ls/'
diff --git a/data/2_Image_creation_management_registry/push_an_image_to_a_registry.yaml b/data/2_Image_creation_management_registry/push_an_image_to_a_registry.yaml
index 6877b35..0d42535 100644
--- a/data/2_Image_creation_management_registry/push_an_image_to_a_registry.yaml
+++ b/data/2_Image_creation_management_registry/push_an_image_to_a_registry.yaml
@@ -2,125 +2,125 @@ questions:
   - uuid: f14c478e-9251-4b8d-b96d-e50767ac6d56
     question: What is the main purpose of the `docker image push` command?
     answers:
-      - { value: "To start a container from an image", correct: false }
-      - { value: "To upload a local image to a container registry", correct: true }
-      - { value: "To remove an image from local storage", correct: false }
-      - { value: "To compress an image", correct: false }
+      - { value: 'To start a container from an image', correct: false }
+      - { value: 'To upload a local image to a container registry', correct: true }
+      - { value: 'To remove an image from local storage', correct: false }
+      - { value: 'To compress an image', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/push/
 
   - uuid: 84754c3f-b5fc-474e-afe5-90fbd5d92471
     question: Before pushing an image to a registry, what must be done?
     answers:
-      - { value: "Tag the image with the registry hostname", correct: true }
-      - { value: "Run the container once", correct: false }
-      - { value: "Rename the image using docker rename", correct: false }
-      - { value: "Export the image", correct: false }
+      - { value: 'Tag the image with the registry hostname', correct: true }
+      - { value: 'Run the container once', correct: false }
+      - { value: 'Rename the image using docker rename', correct: false }
+      - { value: 'Export the image', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/push/#push-a-new-image-to-a-registry
 
   - uuid: ab875d15-8d62-4ff3-9d6f-c42a93e1b2e7
     question: What does the `--all-tags` (`-a`) flag do when using `docker image push`?
     answers:
-      - { value: "Removes unused image tags", correct: false }
-      - { value: "Pushes the latest tag only", correct: false }
-      - { value: "Pushes all tags associated with the image to the registry", correct: true }
-      - { value: "Displays tags without pushing", correct: false }
+      - { value: 'Removes unused image tags', correct: false }
+      - { value: 'Pushes the latest tag only', correct: false }
+      - { value: 'Pushes all tags associated with the image to the registry', correct: true }
+      - { value: 'Displays tags without pushing', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/push/#push-all-tags-of-an-image--a---all-tags
 
   - uuid: a1e36033-4ed3-495b-b5cd-e34fe3a4d2d4
     question: What is the default behavior regarding image signing when pushing an image?
     answers:
-      - { value: "Docker always signs images", correct: false }
-      - { value: "Image signing is not supported", correct: false }
-      - { value: "Docker Content Trust is enabled unless explicitly disabled", correct: true }
-      - { value: "Signing is enabled only with Docker EE", correct: false }
+      - { value: 'Docker always signs images', correct: false }
+      - { value: 'Image signing is not supported', correct: false }
+      - { value: 'Docker Content Trust is enabled unless explicitly disabled', correct: true }
+      - { value: 'Signing is enabled only with Docker EE', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/push/#options
 
   - uuid: cb4190c0-dad0-4e15-b028-92f7e5be63e1
     question: What happens when you press `CTRL-C` during a `docker image push`?
     answers:
-      - { value: "Only metadata is pushed", correct: false }
-      - { value: "The push is paused", correct: false }
-      - { value: "The push operation is terminated", correct: true }
-      - { value: "Docker retries automatically", correct: false }
+      - { value: 'Only metadata is pushed', correct: false }
+      - { value: 'The push is paused', correct: false }
+      - { value: 'The push operation is terminated', correct: true }
+      - { value: 'Docker retries automatically', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/push/#description
 
   - uuid: 059a9cf0-6219-4f5c-9c2f-e3515a42cdbc
     question: What does the progress bar shown during `docker image push` represent?
     answers:
-      - { value: "The uncompressed size of the layers", correct: true }
-      - { value: "Time remaining for push", correct: false }
-      - { value: "The size of the manifest only", correct: false }
-      - { value: "The compressed size of the layers", correct: false }
+      - { value: 'The uncompressed size of the layers', correct: true }
+      - { value: 'Time remaining for push', correct: false }
+      - { value: 'The size of the manifest only', correct: false }
+      - { value: 'The compressed size of the layers', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/push/#description
 
   - uuid: 4a6eaa8e-9a94-4c0f-93a0-ef6cb7e660b9
     question: What is the purpose of the `--platform` flag?
     answers:
-      - { value: "To test multi-arch builds locally", correct: false }
-      - { value: "To switch Docker client OS", correct: false }
-      - { value: "To push a platform-specific image to the registry", correct: true }
-      - { value: "To select a tag automatically", correct: false }
+      - { value: 'To test multi-arch builds locally', correct: false }
+      - { value: 'To switch Docker client OS', correct: false }
+      - { value: 'To push a platform-specific image to the registry', correct: true }
+      - { value: 'To select a tag automatically', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/push/#options
 
   - uuid: e4b39587-9b8b-43d7-9bd6-0e66a4ae06c5
     question: What is the default number of concurrent layer uploads during a `docker push`?
     answers:
-      - { value: "1", correct: false }
-      - { value: "10", correct: false }
-      - { value: "5", correct: true }
-      - { value: "3", correct: false }
+      - { value: '1', correct: false }
+      - { value: '10', correct: false }
+      - { value: '5', correct: true }
+      - { value: '3', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/push/#concurrent-uploads
 
   - uuid: 1ac0384f-e5f0-45bb-9fa4-1bb07c57db4c
     question: How can you reduce timeouts on slow connections when pushing images?
     answers:
-      - { value: "Set `--compress` to false", correct: false }
-      - { value: "Use only the `latest` tag", correct: false }
-      - { value: "Use `--quiet` mode", correct: false }
-      - { value: "Set `--max-concurrent-uploads` in the Docker daemon config", correct: true }
+      - { value: 'Set `--compress` to false', correct: false }
+      - { value: 'Use only the `latest` tag', correct: false }
+      - { value: 'Use `--quiet` mode', correct: false }
+      - { value: 'Set `--max-concurrent-uploads` in the Docker daemon config', correct: true }
     help: https://docs.docker.com/reference/cli/docker/image/push/#concurrent-uploads
 
   - uuid: 8e2cc1b8-2922-4fd4-a6a1-9ae55aaf35e8
     question: What is a required step before pushing an image to a private registry?
     answers:
-      - { value: "Sign the image", correct: false }
-      - { value: "Disable content trust", correct: false }
-      - { value: "Authenticate with `docker login`", correct: true }
-      - { value: "Run the image at least once", correct: false }
+      - { value: 'Sign the image', correct: false }
+      - { value: 'Disable content trust', correct: false }
+      - { value: 'Authenticate with `docker login`', correct: true }
+      - { value: 'Run the image at least once', correct: false }
     help: https://docs.docker.com/reference/cli/docker/login/
 
   - uuid: d85a620c-f4b8-4bc5-a1ff-9b5edb620eda
     question: Which command pushes all tags of a local image to a registry?
     answers:
-      - { value: "docker image tag -a myimage", correct: false }
-      - { value: "docker image push -a myimage", correct: true }
-      - { value: "docker tag --push-all myimage", correct: false }
-      - { value: "docker image push-all myimage", correct: false }
+      - { value: 'docker image tag -a myimage', correct: false }
+      - { value: 'docker image push -a myimage', correct: true }
+      - { value: 'docker tag --push-all myimage', correct: false }
+      - { value: 'docker image push-all myimage', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/push/#push-all-tags-of-an-image--a---all-tags
 
   - uuid: a144fc27-c20f-4577-8d1d-0cf4de8bfb12
     question: Which characters are allowed in image names when pushing to a registry?
     answers:
-      - { value: "Any Unicode character", correct: false }
-      - { value: "Letters and slashes only", correct: false }
-      - { value: "Only lowercase letters", correct: false }
-      - { value: "a-z, 0-9, hyphen (-), underscore (_) and dot (.)", correct: true }
+      - { value: 'Any Unicode character', correct: false }
+      - { value: 'Letters and slashes only', correct: false }
+      - { value: 'Only lowercase letters', correct: false }
+      - { value: 'a-z, 0-9, hyphen (-), underscore (_) and dot (.)', correct: true }
     help: https://docs.docker.com/reference/cli/docker/image/tag/#extended-description
 
   - uuid: 0f93a32d-eac8-4ed6-8856-b2f5bcfc8e9b
     question: What does `--disable-content-trust` do?
     answers:
-      - { value: "Prevents tag propagation", correct: false }
-      - { value: "Disables signing of images when pushing", correct: true }
-      - { value: "Enables compressed layer upload", correct: false }
-      - { value: "Disables pushing to private registries", correct: false }
+      - { value: 'Prevents tag propagation', correct: false }
+      - { value: 'Disables signing of images when pushing', correct: true }
+      - { value: 'Enables compressed layer upload', correct: false }
+      - { value: 'Disables pushing to private registries', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/push/#options
 
   - uuid: f3cf7e1f-947a-4878-92fc-04e96a7762ed
     question: What does `docker image push -q` do?
     answers:
-      - { value: "Only validate push without executing it", correct: false }
-      - { value: "Suppress verbose output", correct: true }
-      - { value: "Upload quietly and delete local image", correct: false }
-      - { value: "Compress layers before push", correct: false }
+      - { value: 'Only validate push without executing it', correct: false }
+      - { value: 'Suppress verbose output', correct: true }
+      - { value: 'Upload quietly and delete local image', correct: false }
+      - { value: 'Compress layers before push', correct: false }
     help: https://docs.docker.com/reference/cli/docker/image/push/#options
diff --git a/data/2_Image_creation_management_registry/sign_an_image_in_a_registry.yaml b/data/2_Image_creation_management_registry/sign_an_image_in_a_registry.yaml
index 92594ac..45ba320 100644
--- a/data/2_Image_creation_management_registry/sign_an_image_in_a_registry.yaml
+++ b/data/2_Image_creation_management_registry/sign_an_image_in_a_registry.yaml
@@ -2,107 +2,107 @@ questions:
   - uuid: 30b80d87-1cd4-48b7-8260-2f6f9f22806f
     question: What is the purpose of signing a Docker image?
     answers:
-      - { value: "To store the image in an offline registry", correct: false }
-      - { value: "To compress the image layers before pushing", correct: false }
-      - { value: "To verify the authenticity and integrity of the image", correct: true }
-      - { value: "To encrypt the image before upload", correct: false }
+      - { value: 'To store the image in an offline registry', correct: false }
+      - { value: 'To compress the image layers before pushing', correct: false }
+      - { value: 'To verify the authenticity and integrity of the image', correct: true }
+      - { value: 'To encrypt the image before upload', correct: false }
     help: https://docs.docker.com/engine/security/trust/
 
   - uuid: ffa6b401-d9f7-497e-b170-1cdd78e2d2e1
     question: Which Docker feature enables image signing?
     answers:
-      - { value: "Docker Safe Mode", correct: false }
-      - { value: "Docker Content Trust (DCT)", correct: true }
-      - { value: "Docker Daemon Lock", correct: false }
-      - { value: "Docker TLS Encryption", correct: false }
+      - { value: 'Docker Safe Mode', correct: false }
+      - { value: 'Docker Content Trust (DCT)', correct: true }
+      - { value: 'Docker Daemon Lock', correct: false }
+      - { value: 'Docker TLS Encryption', correct: false }
     help: https://docs.docker.com/engine/security/trust/
 
   - uuid: 2a8aa1e9-3c91-48f2-9643-9791bbeb58e6
     question: Which environment variable must be set to enable Docker Content Trust?
     answers:
-      - { value: "DCT_ENABLE=true", correct: false }
-      - { value: "DOCKER_SIGN_IMAGES=true", correct: false }
-      - { value: "DOCKER_CONTENT_TRUST=1", correct: true }
-      - { value: "ENABLE_IMAGE_SIGNATURES=1", correct: false }
+      - { value: 'DCT_ENABLE=true', correct: false }
+      - { value: 'DOCKER_SIGN_IMAGES=true', correct: false }
+      - { value: 'DOCKER_CONTENT_TRUST=1', correct: true }
+      - { value: 'ENABLE_IMAGE_SIGNATURES=1', correct: false }
     help: https://docs.docker.com/engine/security/trust/content_trust/
 
   - uuid: dcf2b2e3-2e45-440c-bec3-5e51be6a2112
     question: What happens when `DOCKER_CONTENT_TRUST=1` is enabled?
     answers:
-      - { value: "All images will be pushed to a Notary registry", correct: false }
-      - { value: "Docker will generate a checksum for each image", correct: false }
-      - { value: "The daemon stores credentials in plaintext", correct: false }
-      - { value: "Push and pull operations will only succeed if the image is signed", correct: true }
+      - { value: 'All images will be pushed to a Notary registry', correct: false }
+      - { value: 'Docker will generate a checksum for each image', correct: false }
+      - { value: 'The daemon stores credentials in plaintext', correct: false }
+      - { value: 'Push and pull operations will only succeed if the image is signed', correct: true }
     help: https://docs.docker.com/engine/security/trust/content_trust/
 
   - uuid: 5906c6a5-94c0-4dc3-b287-81b72f96a6e7
     question: What tool is used behind the scenes by Docker to manage image signatures?
     answers:
-      - { value: "GPG", correct: false }
-      - { value: "Vault", correct: false }
-      - { value: "HashiSign", correct: false }
-      - { value: "Notary", correct: true }
+      - { value: 'GPG', correct: false }
+      - { value: 'Vault', correct: false }
+      - { value: 'HashiSign', correct: false }
+      - { value: 'Notary', correct: true }
     help: https://github.com/notaryproject/notary#using-notary
 
   - uuid: 741a8e0a-d685-464a-a678-57d571c3d2cc
     question: Which keys are involved in the Docker Content Trust system?
     answers:
-      - { value: "Public key and token key", correct: false }
-      - { value: "Docker Hub key and system key", correct: false }
-      - { value: "Root key and repository key", correct: true }
-      - { value: "TLS key and encryption key", correct: false }
+      - { value: 'Public key and token key', correct: false }
+      - { value: 'Docker Hub key and system key', correct: false }
+      - { value: 'Root key and repository key', correct: true }
+      - { value: 'TLS key and encryption key', correct: false }
     help: https://docs.docker.com/engine/security/trust/trust_delegation/
 
   - uuid: 87920cd7-34f4-49a8-92bc-1270a49fa2df
     question: Which command pushes a signed image to a registry?
     answers:
-      - { value: "docker push --sign imagename", correct: false }
-      - { value: "docker push --trust imagename", correct: false }
-      - { value: "docker push --secure imagename", correct: false }
-      - { value: "docker push imagename", correct: true }
+      - { value: 'docker push --sign imagename', correct: false }
+      - { value: 'docker push --trust imagename', correct: false }
+      - { value: 'docker push --secure imagename', correct: false }
+      - { value: 'docker push imagename', correct: true }
     help: https://docs.docker.com/engine/security/trust/content_trust/#push-trusted-content
 
   - uuid: 32573e45-26c1-4a8b-b90e-3dc0679fe62a
     question: What happens if you try to pull an unsigned image with DCT enabled?
     answers:
-      - { value: "The pull fails with an error", correct: true }
-      - { value: "Docker signs the image automatically", correct: false }
-      - { value: "Docker ignores the trust setting", correct: false }
-      - { value: "The image is pulled in read-only mode", correct: false }
+      - { value: 'The pull fails with an error', correct: true }
+      - { value: 'Docker signs the image automatically', correct: false }
+      - { value: 'Docker ignores the trust setting', correct: false }
+      - { value: 'The image is pulled in read-only mode', correct: false }
     help: https://docs.docker.com/engine/security/trust/content_trust/#pull-trusted-content
 
   - uuid: efafc192-788f-43f2-9ae6-540ae9d07cf8
     question: What is the best practice for managing root keys in Docker Content Trust?
     answers:
-      - { value: "Store them offline", correct: true }
-      - { value: "Push them to Docker Hub", correct: false }
-      - { value: "Share with your team", correct: false }
-      - { value: "Encrypt them using base64", correct: false }
+      - { value: 'Store them offline', correct: true }
+      - { value: 'Push them to Docker Hub', correct: false }
+      - { value: 'Share with your team', correct: false }
+      - { value: 'Encrypt them using base64', correct: false }
     help: https://docs.docker.com/engine/security/trust/trust_delegation/
 
   - uuid: 3493871e-6fc6-4f14-91aa-99b48b4f4cf2
     question: Which command can be used to list signed tags?
     answers:
-      - { value: "docker tag --trusted imagename", correct: false }
-      - { value: "docker image inspect imagename --signatures", correct: false }
-      - { value: "docker trust inspect --pretty imagename", correct: true }
-      - { value: "docker trust list imagename", correct: false }
+      - { value: 'docker tag --trusted imagename', correct: false }
+      - { value: 'docker image inspect imagename --signatures', correct: false }
+      - { value: 'docker trust inspect --pretty imagename', correct: true }
+      - { value: 'docker trust list imagename', correct: false }
     help: https://docs.docker.com/engine/security/trust/trust_delegation/#view-signed-images
 
   - uuid: 97f8f65a-3df1-4ab5-95c9-c5d146dfbd91
     question: What is the purpose of delegating signing responsibilities in Docker Content Trust?
     answers:
-      - { value: "To publish to multiple registries", correct: false }
-      - { value: "To allow other team members to sign images without access to the root key", correct: true }
-      - { value: "To rotate TLS certificates", correct: false }
-      - { value: "To allow image scanning before signing", correct: false }
+      - { value: 'To publish to multiple registries', correct: false }
+      - { value: 'To allow other team members to sign images without access to the root key', correct: true }
+      - { value: 'To rotate TLS certificates', correct: false }
+      - { value: 'To allow image scanning before signing', correct: false }
     help: https://docs.docker.com/engine/security/trust/trust_delegation/
 
   - uuid: 5d5d9700-80c2-4ab1-814c-6542eaad50cb
     question: Which flag disables image signing temporarily for a push?
     answers:
-      - { value: "--unsigned", correct: false }
-      - { value: "--no-sign", correct: false }
-      - { value: "--skip-sign", correct: false }
-      - { value: "--disable-content-trust", correct: true }
+      - { value: '--unsigned', correct: false }
+      - { value: '--no-sign', correct: false }
+      - { value: '--skip-sign', correct: false }
+      - { value: '--disable-content-trust', correct: true }
     help: https://docs.docker.com/reference/cli/docker/image/push/#options
diff --git a/data/2_Image_creation_management_registry/single_layer.yaml b/data/2_Image_creation_management_registry/single_layer.yaml
index 5ead6dc..30f15eb 100644
--- a/data/2_Image_creation_management_registry/single_layer.yaml
+++ b/data/2_Image_creation_management_registry/single_layer.yaml
@@ -2,80 +2,80 @@ questions:
   - uuid: 5f3ac20f-5ae4-40e5-9fa7-bcb3eaac4ea2
     question: Which technique allows reducing a Docker image to a single final useful layer?
     answers:
-      - { value: "Use the --squash option by default", correct: false }
-      - { value: "Push the image to a private registry", correct: false }
-      - { value: "Use a multi-stage build", correct: true }
-      - { value: "Enable content trust", correct: false }
+      - { value: 'Use the --squash option by default', correct: false }
+      - { value: 'Push the image to a private registry', correct: false }
+      - { value: 'Use a multi-stage build', correct: true }
+      - { value: 'Enable content trust', correct: false }
     help: https://docs.docker.com/develop/develop-images/multistage-build/
 
   - uuid: f2cbe39d-8e84-46d2-9434-d6b00b40c517
     question: Which command creates an image with layers squashed (merged) together?
     answers:
-      - { value: "docker image squash myimage", correct: false }
-      - { value: "docker build --squash -t myimage .", correct: true }
-      - { value: "docker build --single-layer .", correct: false }
-      - { value: "docker prune --layers", correct: false }
+      - { value: 'docker image squash myimage', correct: false }
+      - { value: 'docker build --squash -t myimage .', correct: true }
+      - { value: 'docker build --single-layer .', correct: false }
+      - { value: 'docker prune --layers', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/build/#squash-an-image
 
   - uuid: 8ed57f28-4734-4ed1-88b8-55e0e5c747b4
     question: What is a possible consequence of using --squash?
     answers:
-      - { value: "Intermediate steps are no longer visible", correct: true }
-      - { value: "The build cache is improved", correct: false }
-      - { value: "It automatically creates a multi-architecture image", correct: false }
-      - { value: "Metadata from each step is preserved", correct: false }
+      - { value: 'Intermediate steps are no longer visible', correct: true }
+      - { value: 'The build cache is improved', correct: false }
+      - { value: 'It automatically creates a multi-architecture image', correct: false }
+      - { value: 'Metadata from each step is preserved', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/build/#squash-an-image
 
   - uuid: c1580b93-c89f-4c62-b5ee-0a0ad82cf5f6
     question: Which instruction is used to copy only the final artifacts from an intermediate build stage?
     answers:
-      - { value: "COPY --from=builder /app /app", correct: true }
-      - { value: "RUN mv /app /app", correct: false }
-      - { value: "INCLUDE /app FROM builder", correct: false }
-      - { value: "EXPORT /app TO /app", correct: false }
+      - { value: 'COPY --from=builder /app /app', correct: true }
+      - { value: 'RUN mv /app /app', correct: false }
+      - { value: 'INCLUDE /app FROM builder', correct: false }
+      - { value: 'EXPORT /app TO /app', correct: false }
     help: https://docs.docker.com/develop/develop-images/multistage-build/
 
   - uuid: b0caccf5-7c2d-4c2e-a058-d4bfc5acb2a9
     question: Why is a minimalist base image (like `scratch` or `alpine`) often used in an optimized build?
     answers:
-      - { value: "For aesthetic reasons", correct: false }
-      - { value: "To reduce the attack surface and final size", correct: true }
-      - { value: "To add more system dependencies", correct: false }
-      - { value: "To avoid the build cache", correct: false }
+      - { value: 'For aesthetic reasons', correct: false }
+      - { value: 'To reduce the attack surface and final size', correct: true }
+      - { value: 'To add more system dependencies', correct: false }
+      - { value: 'To avoid the build cache', correct: false }
     help: https://docs.docker.com/develop/develop-images/multistage-build/
 
   - uuid: 36f3ac3b-fde1-45e0-9e07-6a34b81db8d4
     question: Is the `--squash` flag enabled by default in `docker build`?
     answers:
-      - { value: "Yes", correct: false }
-      - { value: "No, it must be explicitly used", correct: true }
-      - { value: "Only on Windows", correct: false }
-      - { value: "Only with BuildKit", correct: false }
+      - { value: 'Yes', correct: false }
+      - { value: 'No, it must be explicitly used', correct: true }
+      - { value: 'Only on Windows', correct: false }
+      - { value: 'Only with BuildKit', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/build/#squash-an-image
 
   - uuid: c6d9fe91-bf3f-4954-b2a8-07f5f93cd74d
     question: Why does the `docker history` command still show multiple layers after a multi-stage build?
     answers:
-      - { value: "Multi-stage builds do not merge layers, they only keep the useful instructions", correct: true }
-      - { value: "It is a known Docker bug", correct: false }
-      - { value: "Metadata is not overwritten", correct: false }
-      - { value: "Because old images are not deleted", correct: false }
+      - { value: 'Multi-stage builds do not merge layers, they only keep the useful instructions', correct: true }
+      - { value: 'It is a known Docker bug', correct: false }
+      - { value: 'Metadata is not overwritten', correct: false }
+      - { value: 'Because old images are not deleted', correct: false }
     help: https://docs.docker.com/develop/develop-images/multistage-build/
 
   - uuid: 9d2fd17a-37e0-41f5-b5b1-8c5f62cdb063
     question: What is the best practice for creating a single-layer executable image?
     answers:
-      - { value: "Use `FROM scratch` and copy only the required binaries", correct: true }
-      - { value: "Stack multiple RUN instructions one after another", correct: false }
-      - { value: "Add all resources in a single `COPY`", correct: false }
-      - { value: "Use multiple layers for each dependency", correct: false }
+      - { value: 'Use `FROM scratch` and copy only the required binaries', correct: true }
+      - { value: 'Stack multiple RUN instructions one after another', correct: false }
+      - { value: 'Add all resources in a single `COPY`', correct: false }
+      - { value: 'Use multiple layers for each dependency', correct: false }
     help: https://docs.docker.com/develop/develop-images/multistage-build/
 
   - uuid: e3a6cdbc-56b3-4e89-93dc-990bd622c8b5
     question: Which native Docker tool allows combining the layers of an already existing image?
     answers:
-      - { value: "docker flatten", correct: false }
-      - { value: "docker merge-layers", correct: false }
-      - { value: "docker build --squash", correct: true }
-      - { value: "docker compact", correct: false }
+      - { value: 'docker flatten', correct: false }
+      - { value: 'docker merge-layers', correct: false }
+      - { value: 'docker build --squash', correct: true }
+      - { value: 'docker compact', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/build/#squash-an-image
diff --git a/data/2_Image_creation_management_registry/utilize_search_in_a_registry.yaml b/data/2_Image_creation_management_registry/utilize_search_in_a_registry.yaml
index 9cb1621..26552f5 100644
--- a/data/2_Image_creation_management_registry/utilize_search_in_a_registry.yaml
+++ b/data/2_Image_creation_management_registry/utilize_search_in_a_registry.yaml
@@ -2,80 +2,80 @@ questions:
   - uuid: 5fef9edb-10cf-44be-866b-2b942bcb3a38
     question: What does the `docker search` command do?
     answers:
-      - { value: "Searches a local registry for containers", correct: false }
-      - { value: "Searches the file system for Dockerfiles", correct: false }
-      - { value: "Searches Docker Hub for images", correct: true }
-      - { value: "Searches running containers on the host", correct: false }
+      - { value: 'Searches a local registry for containers', correct: false }
+      - { value: 'Searches the file system for Dockerfiles', correct: false }
+      - { value: 'Searches Docker Hub for images', correct: true }
+      - { value: 'Searches running containers on the host', correct: false }
     help: https://docs.docker.com/reference/cli/docker/search/
 
   - uuid: 23b8b2fc-0f42-4c7a-913a-5f22b85f7a46
     question: Which option allows filtering images by number of stars in `docker search`?
     answers:
-      - { value: "--stars=3", correct: false }
-      - { value: "--rating=3", correct: false }
-      - { value: "--star-count=3", correct: false }
-      - { value: "--filter stars=3", correct: true }
+      - { value: '--stars=3', correct: false }
+      - { value: '--rating=3', correct: false }
+      - { value: '--star-count=3', correct: false }
+      - { value: '--filter stars=3', correct: true }
     help: https://docs.docker.com/reference/cli/docker/search/#filtering---filter
 
   - uuid: 51f98b1d-09e9-4d5d-bcad-e03b7f04121a
     question: How can you filter search results to show only official images?
     answers:
-      - { value: "--filter type=official", correct: false }
-      - { value: "--type=official", correct: false }
-      - { value: "--official-only", correct: false }
-      - { value: "--filter is-official=true", correct: true }
+      - { value: '--filter type=official', correct: false }
+      - { value: '--type=official', correct: false }
+      - { value: '--official-only', correct: false }
+      - { value: '--filter is-official=true', correct: true }
     help: https://docs.docker.com/reference/cli/docker/search/#filtering---filter
 
   - uuid: 9b315a2e-7a18-4c84-80eb-4c0cf79c3a1b
     question: What does the `--no-trunc` option do in `docker search`?
     answers:
-      - { value: "Truncates the output to improve performance", correct: false }
-      - { value: "Disables text wrapping", correct: false }
-      - { value: "Shows truncated results", correct: false }
-      - { value: "Prevents description text from being truncated", correct: true }
+      - { value: 'Truncates the output to improve performance', correct: false }
+      - { value: 'Disables text wrapping', correct: false }
+      - { value: 'Shows truncated results', correct: false }
+      - { value: 'Prevents description text from being truncated', correct: true }
     help: https://docs.docker.com/reference/cli/docker/search/#display-non-truncated-description---no-trunc
 
   - uuid: 8b8368f6-d3b4-42e5-b33c-fc7d97f6df9f
     question: Which command shows only images named 'busybox' with at least 3 stars and that are official?
     answers:
-      - { value: "docker search --filter is-official=true --filter stars=3 busybox", correct: true }
-      - { value: "docker search --stars=3 --type=official busybox", correct: false }
-      - { value: "docker search --official-only --stars=3 busybox", correct: false }
-      - { value: "docker search busybox --filter=official:yes", correct: false }
+      - { value: 'docker search --filter is-official=true --filter stars=3 busybox', correct: true }
+      - { value: 'docker search --stars=3 --type=official busybox', correct: false }
+      - { value: 'docker search --official-only --stars=3 busybox', correct: false }
+      - { value: 'docker search busybox --filter=official:yes', correct: false }
     help: https://docs.docker.com/reference/cli/docker/search/#is-official
 
   - uuid: 96de43b5-f1f2-49cd-9184-ffbfad529e95
     question: What is the purpose of the `--limit` option in `docker search`?
     answers:
-      - { value: "Limit the number of search results", correct: true }
-      - { value: "Limit the number of layers in each image", correct: false }
-      - { value: "Limit search to private registries", correct: false }
-      - { value: "Limit the search timeout", correct: false }
+      - { value: 'Limit the number of search results', correct: true }
+      - { value: 'Limit the number of layers in each image', correct: false }
+      - { value: 'Limit search to private registries', correct: false }
+      - { value: 'Limit the search timeout', correct: false }
     help: https://docs.docker.com/reference/cli/docker/search/#limit-search-results---limit
 
   - uuid: 482a4ccf-c2e9-4e0c-8727-178ccebfec3a
     question: What does the `--format` option in `docker search` do?
     answers:
-      - { value: "Formats the output using a Go template", correct: true }
-      - { value: "Formats the image for pushing", correct: false }
-      - { value: "Specifies an output file", correct: false }
-      - { value: "Displays detailed manifest information", correct: false }
+      - { value: 'Formats the output using a Go template', correct: true }
+      - { value: 'Formats the image for pushing', correct: false }
+      - { value: 'Specifies an output file', correct: false }
+      - { value: 'Displays detailed manifest information', correct: false }
     help: https://docs.docker.com/reference/cli/docker/search/#format-the-output---format
 
   - uuid: b3144f90-d96c-4c4d-9d5e-9d7f3e03a350
     question: What placeholder would you use in a Go template to print the star count in a formatted search result?
     answers:
-      - { value: ".Rating", correct: false }
-      - { value: ".Favorites", correct: false }
-      - { value: ".StarCount", correct: true }
-      - { value: ".Stars", correct: false }
+      - { value: '.Rating', correct: false }
+      - { value: '.Favorites', correct: false }
+      - { value: '.StarCount', correct: true }
+      - { value: '.Stars', correct: false }
     help: https://docs.docker.com/reference/cli/docker/search/#format-the-output---format
 
   - uuid: b490376e-624f-421f-92e7-7ecb746d6d6c
     question: Which command would list image names and star counts, separated by a colon?
     answers:
-      - { value: "docker search nginx --columns name,stars", correct: false }
-      - { value: "docker search nginx --output=name:stars", correct: false }
-      - { value: "docker search --format '{{Name}}: {{StarCount}}' nginx", correct: false }
-      - { value: "docker search --format '{{.Name}}: {{.StarCount}}' nginx", correct: true }
+      - { value: 'docker search nginx --columns name,stars', correct: false }
+      - { value: 'docker search nginx --output=name:stars', correct: false }
+      - { value: 'docker search --format "{{Name}}: {{StarCount}}" nginx', correct: false }
+      - { value: 'docker search --format "{{.Name}}: {{.StarCount}}" nginx', correct: true }
     help: https://docs.docker.com/reference/cli/docker/search/#format-the-output---format
diff --git a/data/3_installation_and_configuration/backup_ucp_dtr.yaml b/data/3_installation_and_configuration/backup_ucp_dtr.yaml
index b902972..3c1c050 100644
--- a/data/3_installation_and_configuration/backup_ucp_dtr.yaml
+++ b/data/3_installation_and_configuration/backup_ucp_dtr.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: 2fd05cc9-0e15-4ac4-ae3b-9a49ac0380f6
     question: Which command allows you to back up UCP data?
     answers:
-      - { value: "docker swarm backup", correct: false }
-      - { value: "docker ucp export", correct: false }
-      - { value: "docker container exec ucp etcd backup > backup.tar", correct: true }
-      - { value: "docker backup ucp --output backup.tar", correct: false }
+      - { value: 'docker swarm backup', correct: false }
+      - { value: 'docker ucp export', correct: false }
+      - { value: 'docker container exec ucp etcd backup > backup.tar', correct: true }
+      - { value: 'docker backup ucp --output backup.tar', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/backup-restore.html
 
   - uuid: 0b122010-4d64-44ff-8153-f33c3dc3e2f0
     question: What must be done before performing a UCP restore?
     answers:
-      - { value: "Stop the Docker service on the target node", correct: true }
-      - { value: "Delete all volumes", correct: false }
-      - { value: "Restart all containers", correct: false }
-      - { value: "Purge all logs", correct: false }
+      - { value: 'Stop the Docker service on the target node', correct: true }
+      - { value: 'Delete all volumes', correct: false }
+      - { value: 'Restart all containers', correct: false }
+      - { value: 'Purge all logs', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/backup-restore.html#restore
 
   - uuid: fdc31b03-3093-4638-a77f-ef7b11860d88
     question: Which command allows you to back up a DTR instance?
     answers:
-      - { value: "docker registry save", correct: false }
-      - { value: "docker dtr snapshot", correct: false }
-      - { value: "docker run -it docker/dtr backup", correct: true }
-      - { value: "docker container exec dtr backup", correct: false }
+      - { value: 'docker registry save', correct: false }
+      - { value: 'docker dtr snapshot', correct: false }
+      - { value: 'docker run -it docker/dtr backup', correct: true }
+      - { value: 'docker container exec dtr backup', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/dtr/backup-restore.html
 
   - uuid: fdbb11c1-6f7c-4e93-b487-c4ecdb6f315c
     question: Which command is used to restore a DTR backup?
     answers:
-      - { value: "docker container exec dtr restore backup.tar", correct: false }
-      - { value: "docker dtr load backup.tar", correct: false }
-      - { value: "docker dtr install --restore backup.tar", correct: false }
-      - { value: "docker run -i docker/dtr restore < backup.tar", correct: true }
+      - { value: 'docker container exec dtr restore backup.tar', correct: false }
+      - { value: 'docker dtr load backup.tar', correct: false }
+      - { value: 'docker dtr install --restore backup.tar', correct: false }
+      - { value: 'docker run -i docker/dtr restore < backup.tar', correct: true }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/dtr/backup-restore.html
 
   - uuid: 7b313274-0072-41a0-bd16-170c8672c845
     question: What is essential for a DTR restore to work correctly?
     answers:
-      - { value: "Have Docker Desktop installed", correct: false }
-      - { value: "Use only port 2376", correct: false }
-      - { value: "Be connected to the Internet", correct: false }
-      - { value: "Use the same DTR version as the backup", correct: true }
+      - { value: 'Have Docker Desktop installed', correct: false }
+      - { value: 'Use only port 2376', correct: false }
+      - { value: 'Be connected to the Internet', correct: false }
+      - { value: 'Use the same DTR version as the backup', correct: true }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/dtr/backup-restore.html#restore-backup
 
   - uuid: 38f20494-3c31-4c83-9f39-b3e0b5c6db48
     question: Where are the critical UCP data stored that must be backed up?
     answers:
-      - { value: "/opt/ucp", correct: false }
-      - { value: "/var/ucp/data", correct: false }
-      - { value: "/var/lib/docker/ucp", correct: true }
-      - { value: "/etc/docker/ucp", correct: false }
+      - { value: '/opt/ucp', correct: false }
+      - { value: '/var/ucp/data', correct: false }
+      - { value: '/var/lib/docker/ucp', correct: true }
+      - { value: '/etc/docker/ucp', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/backup-restore.html
 
   - uuid: 91f9d1ef-d40b-40fa-a45e-4cb95641727b
     question: What is the best practice for scheduling UCP and DTR backups?
     answers:
-      - { value: "Automate the backup with scripts and store it outside the cluster", correct: true }
-      - { value: "Perform a manual backup once a month", correct: false }
-      - { value: "Delete old logs and volumes", correct: false }
-      - { value: "Create an image commit every night", correct: false }
+      - { value: 'Automate the backup with scripts and store it outside the cluster', correct: true }
+      - { value: 'Perform a manual backup once a month', correct: false }
+      - { value: 'Delete old logs and volumes', correct: false }
+      - { value: 'Create an image commit every night', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/backup-restore.html#best-practices
 
   - uuid: 65ae1827-32ec-4d6f-84ed-f41fef47135e
     question: Can a full UCP cluster be restored from a single backup?
     answers:
-      - { value: "No, UCP does not support restoration", correct: false }
-      - { value: "Yes, if it was taken on a UCP manager with quorum", correct: true }
-      - { value: "Yes, but only if Swarm is disabled", correct: false }
-      - { value: "No, a backup of each node is required", correct: false }
+      - { value: 'No, UCP does not support restoration', correct: false }
+      - { value: 'Yes, if it was taken on a UCP manager with quorum', correct: true }
+      - { value: 'Yes, but only if Swarm is disabled', correct: false }
+      - { value: 'No, a backup of each node is required', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/backup-restore.html
 
   - uuid: 32590a06-2d90-4b13-8c20-6e06ac3d00e0
     question: What is a common reason for failure when restoring a DTR backup?
     answers:
-      - { value: "Lack of Internet access", correct: false }
-      - { value: "Version incompatibility between the backup and the installed DTR", correct: true }
-      - { value: "DTR already in HA mode", correct: false }
-      - { value: "Incorrectly named volume", correct: false }
+      - { value: 'Lack of Internet access', correct: false }
+      - { value: 'Version incompatibility between the backup and the installed DTR', correct: true }
+      - { value: 'DTR already in HA mode', correct: false }
+      - { value: 'Incorrectly named volume', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/dtr/backup-restore.html#restore-backup
 
   - uuid: 5cf798e7-d097-4992-8b7b-36b63329207d
     question: What best practice should accompany UCP/DTR backups?
     answers:
-      - { value: "Use only local backups", correct: false }
-      - { value: "Disable TLS to simplify restoration", correct: false }
-      - { value: "Manually compress Docker volumes", correct: false }
-      - { value: "Regularly test restorations", correct: true }
+      - { value: 'Use only local backups', correct: false }
+      - { value: 'Disable TLS to simplify restoration', correct: false }
+      - { value: 'Manually compress Docker volumes', correct: false }
+      - { value: 'Regularly test restorations', correct: true }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/backup-restore.html#best-practices
diff --git a/data/3_installation_and_configuration/cert_based_auth_registry.yaml b/data/3_installation_and_configuration/cert_based_auth_registry.yaml
index e4b08dc..0f06fd4 100644
--- a/data/3_installation_and_configuration/cert_based_auth_registry.yaml
+++ b/data/3_installation_and_configuration/cert_based_auth_registry.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: 5e6219e4-9f2b-44a6-a2d6-b45b63b4bb8e
     question: Which protocol enables mutual authentication between a Docker client and a private registry?
     answers:
-      - { value: "JWT", correct: false }
-      - { value: "SSH", correct: false }
-      - { value: "TLS (Transport Layer Security)", correct: true }
-      - { value: "Kerberos", correct: false }
+      - { value: 'JWT', correct: false }
+      - { value: 'SSH', correct: false }
+      - { value: 'TLS (Transport Layer Security)', correct: true }
+      - { value: 'Kerberos', correct: false }
     help: https://docs.docker.com/engine/security/certificates/
 
   - uuid: 12362d39-0461-4e47-a58e-9e1667b9e41d
     question: Where should client certificates be placed for a private registry named `myregistry.com`?
     answers:
-      - { value: "/etc/docker/certs.d/myregistry.com/", correct: true }
-      - { value: "/root/.docker/certs/myregistry.com/", correct: false }
-      - { value: "/etc/ssl/certs/docker/", correct: false }
-      - { value: "/etc/docker/certs/", correct: false }
+      - { value: '/etc/docker/certs.d/myregistry.com/', correct: true }
+      - { value: '/root/.docker/certs/myregistry.com/', correct: false }
+      - { value: '/etc/ssl/certs/docker/', correct: false }
+      - { value: '/etc/docker/certs/', correct: false }
     help: https://docs.docker.com/engine/security/certificates/#create-a-ca-signed-cert-for-client-authentication
 
   - uuid: 0ac063d7-3380-46f5-bde3-d7f859a92e3e
     question: Which files must be present on the client side for TLS authentication with a certificate?
     answers:
-      - { value: "server.crt, server.key", correct: false }
-      - { value: "ca.crt, client.cert, client.key", correct: true }
-      - { value: "id_rsa, authorized_keys", correct: false }
-      - { value: "ca.key, docker.pem, docker.key", correct: false }
+      - { value: 'server.crt, server.key', correct: false }
+      - { value: 'ca.crt, client.cert, client.key', correct: true }
+      - { value: 'id_rsa, authorized_keys', correct: false }
+      - { value: 'ca.key, docker.pem, docker.key', correct: false }
     help: https://docs.docker.com/engine/security/certificates/#configure-the-docker-daemon-for-tls-authentication
 
   - uuid: e242fa73-7f21-47c4-a42e-dc23e20a69fd
     question: What happens if the remote registry requires a client certificate but the client does not provide one?
     answers:
-      - { value: "Docker uses a default token", correct: false }
-      - { value: "Docker retries over HTTP", correct: false }
-      - { value: "The connection is refused with a TLS error", correct: true }
-      - { value: "Docker allows read-only pulls", correct: false }
+      - { value: 'Docker uses a default token', correct: false }
+      - { value: 'Docker retries over HTTP', correct: false }
+      - { value: 'The connection is refused with a TLS error', correct: true }
+      - { value: 'Docker allows read-only pulls', correct: false }
     help: https://docs.docker.com/engine/security/certificates/
 
   - uuid: b70cfe3a-eebc-4a82-9c86-5f0839e40bc4
     question: Which server configuration forces client certificate authentication?
     answers:
-      - { value: "The registry must be configured with `clientca` in the `http.tls` section", correct: true }
-      - { value: "The docker-authz plugin must be enabled", correct: false }
-      - { value: "It is automatic if TLS is enabled", correct: false }
-      - { value: "The registry must expose port 2376", correct: false }
+      - { value: 'The registry must be configured with `clientca` in the `http.tls` section', correct: true }
+      - { value: 'The docker-authz plugin must be enabled', correct: false }
+      - { value: 'It is automatic if TLS is enabled', correct: false }
+      - { value: 'The registry must expose port 2376', correct: false }
     help: https://docs.docker.com/registry/deploying/
 
   - uuid: 7d146e2c-b1f2-4397-a3ee-10f55b90c404
     question: Which secure port is used by default for private Docker registries with TLS?
     answers:
-      - { value: "22", correct: false }
-      - { value: "2376", correct: false }
-      - { value: "443", correct: true }
-      - { value: "5000", correct: false }
+      - { value: '22', correct: false }
+      - { value: '2376', correct: false }
+      - { value: '443', correct: true }
+      - { value: '5000', correct: false }
     help: https://docs.docker.com/registry/insecure/
 
   - uuid: 1765e25a-12d3-4f61-993a-4d39487fd6a6
     question: Once certificates are properly configured, what does `docker pull myregistry.com/myimage` allow?
     answers:
-      - { value: "Disable image verification", correct: false }
-      - { value: "Access all public registries", correct: false }
-      - { value: "Bypass TLS security", correct: false }
-      - { value: "Perform a secure authenticated download", correct: true }
+      - { value: 'Disable image verification', correct: false }
+      - { value: 'Access all public registries', correct: false }
+      - { value: 'Bypass TLS security', correct: false }
+      - { value: 'Perform a secure authenticated download', correct: true }
     help: https://docs.docker.com/engine/security/certificates/
 
   - uuid: ffbf24d4-6b67-41f8-8531-dc8f2db9b7dc
     question: What is the purpose of the `ca.crt` file inside `/etc/docker/certs.d/<registry>/`?
     answers:
-      - { value: "Docker can verify the registry identity via TLS", correct: true }
-      - { value: "This certificate is used to sign images", correct: false }
-      - { value: "It disables Content Trust", correct: false }
-      - { value: "Docker automatically gains admin access", correct: false }
+      - { value: 'Docker can verify the registry identity via TLS', correct: true }
+      - { value: 'This certificate is used to sign images', correct: false }
+      - { value: 'It disables Content Trust', correct: false }
+      - { value: 'Docker automatically gains admin access', correct: false }
     help: https://docs.docker.com/engine/security/certificates/
 
   - uuid: a1f82607-d729-4760-9616-2cf39c64a6d0
     question: Which command can be used to quickly test a TLS connection with a private registry?
     answers:
-      - { value: "curl -v https://myregistry.com/v2/", correct: true }
-      - { value: "docker tls check myregistry.com", correct: false }
-      - { value: "openssl cert validate myregistry.com", correct: false }
-      - { value: "nc -tls myregistry.com 443", correct: false }
+      - { value: 'curl -v https://myregistry.com/v2/', correct: true }
+      - { value: 'docker tls check myregistry.com', correct: false }
+      - { value: 'openssl cert validate myregistry.com', correct: false }
+      - { value: 'nc -tls myregistry.com 443', correct: false }
     help: https://docs.docker.com/registry/deploying/#verify-using-curl
 
   - uuid: 33c15c25-2a1d-4b29-91e7-bb0a1aa730e6
     question: Do you need to restart the Docker daemon after adding certificates?
     answers:
-      - { value: "Only if using docker-compose", correct: false }
-      - { value: "No, except on Windows", correct: false }
-      - { value: "No, Docker reloads them dynamically", correct: false }
-      - { value: "Yes, so it reloads the certificates and establishes the secure connection", correct: true }
+      - { value: 'Only if using docker-compose', correct: false }
+      - { value: 'No, except on Windows', correct: false }
+      - { value: 'No, Docker reloads them dynamically', correct: false }
+      - { value: 'Yes, so it reloads the certificates and establishes the secure connection', correct: true }
     help: https://docs.docker.com/engine/security/certificates/
diff --git a/data/3_installation_and_configuration/deploy_ucp_dtr_ha.yaml b/data/3_installation_and_configuration/deploy_ucp_dtr_ha.yaml
index fe8c32f..e339587 100644
--- a/data/3_installation_and_configuration/deploy_ucp_dtr_ha.yaml
+++ b/data/3_installation_and_configuration/deploy_ucp_dtr_ha.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: 8fdbfa8e-244d-46b8-9041-c74d649bca78
     question: Which command installs UCP on an existing Docker node?
     answers:
-      - { value: "docker install ucp", correct: false }
-      - { value: "docker ucp deploy", correct: false }
-      - { value: "docker swarm ucp init", correct: false }
-      - { value: "docker container run --rm -it --name ucp docker/ucp install", correct: true }
+      - { value: 'docker install ucp', correct: false }
+      - { value: 'docker ucp deploy', correct: false }
+      - { value: 'docker swarm ucp init', correct: false }
+      - { value: 'docker container run --rm -it --name ucp docker/ucp install', correct: true }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/install/
 
   - uuid: 7b11b126-0b6a-4fdf-979c-2e2d413fc3fd
     question: How many manager nodes are required for an HA UCP setup with quorum?
     answers:
-      - { value: "5", correct: false }
-      - { value: "3", correct: true }
-      - { value: "2", correct: false }
-      - { value: "1", correct: false }
+      - { value: '5', correct: false }
+      - { value: '3', correct: true }
+      - { value: '2', correct: false }
+      - { value: '1', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/architecture/#high-availability
 
   - uuid: 2aeebc5e-b670-42b1-a5ff-8fa7ccedfe9e
     question: Which command adds a new UCP manager node to an existing cluster?
     answers:
-      - { value: "docker swarm join --ucp-manager", correct: false }
-      - { value: "docker ucp add-manager", correct: false }
-      - { value: "docker node promote manager", correct: false }
-      - { value: "docker container run --rm -it docker/ucp join --replica", correct: true }
+      - { value: 'docker swarm join --ucp-manager', correct: false }
+      - { value: 'docker ucp add-manager', correct: false }
+      - { value: 'docker node promote manager', correct: false }
+      - { value: 'docker container run --rm -it docker/ucp join --replica', correct: true }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/install/join-linux-nodes.html
 
   - uuid: 21ef8613-10b2-4e0f-a2f3-e2c1d1c8593f
     question: Which command is recommended to install DTR on a UCP node?
     answers:
-      - { value: "docker dtr deploy", correct: false }
-      - { value: "docker registry install", correct: false }
-      - { value: "docker container run --rm docker/dtr install --ucp-url <URL> --ucp-username <user>", correct: true }
-      - { value: "docker swarm add dtr", correct: false }
+      - { value: 'docker dtr deploy', correct: false }
+      - { value: 'docker registry install', correct: false }
+      - { value: 'docker container run --rm docker/dtr install --ucp-url <URL> --ucp-username <user>', correct: true }
+      - { value: 'docker swarm add dtr', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/dtr/install/
 
   - uuid: a75e272c-7b0b-4437-a2a0-38cdd5446f38
     question: On AWS, which option is commonly used to automatically provision multiple Docker nodes?
     answers:
-      - { value: "Ansible only", correct: false }
-      - { value: "Terraform without configuration", correct: false }
-      - { value: "Docker Desktop with swarm mode", correct: false }
-      - { value: "Cloud-init or EC2 user-data scripts", correct: true }
+      - { value: 'Ansible only', correct: false }
+      - { value: 'Terraform without configuration', correct: false }
+      - { value: 'Docker Desktop with swarm mode', correct: false }
+      - { value: 'Cloud-init or EC2 user-data scripts', correct: true }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/ucp/on-aws/
 
   - uuid: c41396d4-17f0-4a8a-9981-1b205728c9c5
     question: What requirement is necessary to deploy DTR in HA?
     answers:
-      - { value: "A latest tag on all images", correct: false }
-      - { value: "Shared or replicated persistent storage", correct: true }
-      - { value: "Root access on all workers", correct: false }
-      - { value: "A single UCP manager", correct: false }
+      - { value: 'A latest tag on all images', correct: false }
+      - { value: 'Shared or replicated persistent storage', correct: true }
+      - { value: 'Root access on all workers', correct: false }
+      - { value: 'A single UCP manager', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/dtr/architecture/#high-availability
 
   - uuid: 85e4de92-7298-4217-9c7c-f3e3ea8c2e84
     question: Which command checks the status of UCP services after installation?
     answers:
-      - { value: "docker swarm status", correct: false }
-      - { value: "docker ucp status", correct: false }
-      - { value: "docker info ucp", correct: false }
-      - { value: "docker container ls", correct: true }
+      - { value: 'docker swarm status', correct: false }
+      - { value: 'docker ucp status', correct: false }
+      - { value: 'docker info ucp', correct: false }
+      - { value: 'docker container ls', correct: true }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/troubleshoot/
 
   - uuid: e65f1c8b-fba5-434a-a1bb-b8461c1d1b2e
     question: What is a good practice to balance load across UCP nodes in HA?
     answers:
-      - { value: "Disable TLS", correct: false }
-      - { value: "Use a node label", correct: false }
-      - { value: "Use a load balancer in front of UCP managers", correct: true }
-      - { value: "Enable debug mode", correct: false }
+      - { value: 'Disable TLS', correct: false }
+      - { value: 'Use a node label', correct: false }
+      - { value: 'Use a load balancer in front of UCP managers', correct: true }
+      - { value: 'Enable debug mode', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/architecture/#ucp-high-availability
 
   - uuid: e47cb7f3-ef17-4718-bbe1-6b13de8ae260
     question: Can UCP and DTR be deployed on the same nodes?
     answers:
-      - { value: "No, except with Docker Desktop", correct: false }
-      - { value: "Yes, only on AWS", correct: false }
-      - { value: "Yes, but it is not recommended in production", correct: true }
-      - { value: "No, they must always be separated", correct: false }
+      - { value: 'No, except with Docker Desktop', correct: false }
+      - { value: 'Yes, only on AWS', correct: false }
+      - { value: 'Yes, but it is not recommended in production', correct: true }
+      - { value: 'No, they must always be separated', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/dtr/install/plan-your-installation.html
 
   - uuid: cdb987f6-48b6-4f4c-9f2f-c34c1c36c837
     question: Which option allows a secondary DTR node to synchronize with a primary node?
     answers:
-      - { value: "--standby", correct: false }
-      - { value: "--join-token", correct: false }
-      - { value: "--replica-id <value>", correct: true }
-      - { value: "--sync-mode", correct: false }
+      - { value: '--standby', correct: false }
+      - { value: '--join-token', correct: false }
+      - { value: '--replica-id <value>', correct: true }
+      - { value: '--sync-mode', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/dtr/install/add-replica.html
diff --git a/data/3_installation_and_configuration/describe_demonstrate_how_configure_docker_daemon_start_boot.yaml b/data/3_installation_and_configuration/describe_demonstrate_how_configure_docker_daemon_start_boot.yaml
index 23aa0de..eec1517 100644
--- a/data/3_installation_and_configuration/describe_demonstrate_how_configure_docker_daemon_start_boot.yaml
+++ b/data/3_installation_and_configuration/describe_demonstrate_how_configure_docker_daemon_start_boot.yaml
@@ -2,72 +2,72 @@ questions:
   - uuid: fcb949b7-fb69-49f5-b70e-1900e342f4f5
     question: How can you ensure the Docker daemon starts automatically on system boot (Linux)?
     answers:
-      - { value: "Use docker login --autostart", correct: false }
-      - { value: "Enable the Docker service using systemd", correct: true }
-      - { value: "Run docker-start in .bashrc", correct: false }
-      - { value: "Create a cron job for Docker", correct: false }
+      - { value: 'Use docker login --autostart', correct: false }
+      - { value: 'Enable the Docker service using systemd', correct: true }
+      - { value: 'Run docker-start in .bashrc', correct: false }
+      - { value: 'Create a cron job for Docker', correct: false }
     help: https://docs.docker.com/config/daemon/start/
 
   - uuid: c1b0e604-fc79-47e2-9875-3eaf1b166ed2
     question: What is the correct systemd command to enable the Docker daemon at startup?
     answers:
-      - { value: "systemctl autostart docker.service", correct: false }
-      - { value: "sudo systemctl enable docker", correct: true }
-      - { value: "docker enable daemon", correct: false }
-      - { value: "sudo docker start --on-boot", correct: false }
+      - { value: 'systemctl autostart docker.service', correct: false }
+      - { value: 'sudo systemctl enable docker', correct: true }
+      - { value: 'docker enable daemon', correct: false }
+      - { value: 'sudo docker start --on-boot', correct: false }
     help: https://docs.docker.com/config/daemon/start/
 
   - uuid: 2f79646d-3aa6-42d6-9005-b2cf9ab32688
     question: How do you verify that the Docker daemon is enabled to start at boot?
     answers:
-      - { value: "cat /etc/init.d/docker.status", correct: false }
-      - { value: "sudo systemctl is-enabled docker", correct: true }
-      - { value: "sudo docker daemon --check", correct: false }
-      - { value: "docker status --boot", correct: false }
+      - { value: 'cat /etc/init.d/docker.status', correct: false }
+      - { value: 'sudo systemctl is-enabled docker', correct: true }
+      - { value: 'sudo docker daemon --check', correct: false }
+      - { value: 'docker status --boot', correct: false }
     help: https://docs.docker.com/config/daemon/start/
 
   - uuid: b3ea7a27-015d-4cd7-a314-1f56ddf8f727
     question: On a system using systemd, what does `systemctl enable docker` do?
     answers:
-      - { value: "Grants root access to Docker", correct: false }
-      - { value: "Starts the Docker service immediately", correct: false }
-      - { value: "Registers the Docker service to start at system boot", correct: true }
-      - { value: "Builds Docker images automatically", correct: false }
+      - { value: 'Grants root access to Docker', correct: false }
+      - { value: 'Starts the Docker service immediately', correct: false }
+      - { value: 'Registers the Docker service to start at system boot', correct: true }
+      - { value: 'Builds Docker images automatically', correct: false }
     help: https://docs.docker.com/config/daemon/start/
 
   - uuid: 00ae3c6f-6e8a-4320-8792-71dc1e3cf7db
     question: Which Linux init system is typically used to manage Docker service startup?
     answers:
-      - { value: "launchd", correct: false }
-      - { value: "upstart", correct: false }
-      - { value: "systemd", correct: true }
-      - { value: "supervisord", correct: false }
+      - { value: 'launchd', correct: false }
+      - { value: 'upstart', correct: false }
+      - { value: 'systemd', correct: true }
+      - { value: 'supervisord', correct: false }
     help: https://docs.docker.com/config/daemon/start/
 
   - uuid: e9f2175f-5d27-4681-bc43-00680ac3b345
     question: After modifying Docker daemon configuration in `/etc/docker/daemon.json`, what must you do?
     answers:
-      - { value: "Restart the Docker daemon", correct: true }
-      - { value: "Log out and back in", correct: false }
-      - { value: "Reinstall Docker", correct: false }
-      - { value: "Reboot the system", correct: false }
+      - { value: 'Restart the Docker daemon', correct: true }
+      - { value: 'Log out and back in', correct: false }
+      - { value: 'Reinstall Docker', correct: false }
+      - { value: 'Reboot the system', correct: false }
     help: https://docs.docker.com/config/daemon/
 
   - uuid: 59307116-5f8e-4cb2-bbce-e8a02fe18a83
     question: On Windows, how do you configure Docker Desktop to start on login?
     answers:
-      - { value: "Use `docker login --autostart`", correct: false }
-      - { value: "Edit systemd unit", correct: false }
-      - { value: "Enable via Group Policy Editor", correct: false }
-      - { value: "Enable 'Start Docker Desktop when you log in' in settings", correct: true }
+      - { value: 'Use `docker login --autostart`', correct: false }
+      - { value: 'Edit systemd unit', correct: false }
+      - { value: 'Enable via Group Policy Editor', correct: false }
+      - { value: 'Enable `Start Docker Desktop when you log in` in settings', correct: true }
     help: https://docs.docker.com/desktop/settings/windows/
 
   - uuid: 53efb6e0-2a6d-4a96-89e9-6317f03bb11c
     question: If the Docker daemon fails to start automatically at boot, what should you check first?
     answers:
-      - { value: "Your container entrypoint", correct: false }
-      - { value: "The systemd service status with `systemctl status docker`", correct: true }
-      - { value: "The contents of your Dockerfile", correct: false }
-      - { value: "The Docker image ID", correct: false }
+      - { value: 'Your container entrypoint', correct: false }
+      - { value: 'The systemd service status with `systemctl status docker`', correct: true }
+      - { value: 'The contents of your Dockerfile', correct: false }
+      - { value: 'The Docker image ID', correct: false }
     help: https://docs.docker.com/config/daemon/
 
diff --git a/data/3_installation_and_configuration/describe_namespaces_cgroups_certificates.yaml b/data/3_installation_and_configuration/describe_namespaces_cgroups_certificates.yaml
index 33f348c..fcb2cbf 100644
--- a/data/3_installation_and_configuration/describe_namespaces_cgroups_certificates.yaml
+++ b/data/3_installation_and_configuration/describe_namespaces_cgroups_certificates.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: 1917f6e3-7a64-4a67-81e2-9f42a708cd4b
     question: What is the primary purpose of Linux namespaces in Docker?
     answers:
-      - { value: "To encrypt container data at rest", correct: false }
-      - { value: "To provide process and resource isolation for containers", correct: true }
-      - { value: "To assign IP addresses to containers", correct: false }
-      - { value: "To manage container user roles", correct: false }
+      - { value: 'To encrypt container data at rest', correct: false }
+      - { value: 'To provide process and resource isolation for containers', correct: true }
+      - { value: 'To assign IP addresses to containers', correct: false }
+      - { value: 'To manage container user roles', correct: false }
     help: https://docs.docker.com/enterprise/security/hardened-desktop/enhanced-container-isolation/
 
   - uuid: 9735f77f-77e4-49a2-a3aa-3fc1585a412f
     question: Which namespace is used to isolate network resources in Docker?
     answers:
-      - { value: "pid", correct: false }
-      - { value: "mnt", correct: false }
-      - { value: "net", correct: true }
-      - { value: "uts", correct: false }
+      - { value: 'pid', correct: false }
+      - { value: 'mnt', correct: false }
+      - { value: 'net', correct: true }
+      - { value: 'uts', correct: false }
     help: https://docs.docker.com/enterprise/security/hardened-desktop/enhanced-container-isolation/
 
   - uuid: 00e37740-5f91-4fc7-9b01-063c1e26e426
     question: What does the 'pid' namespace isolate in Docker?
     answers:
-      - { value: "Mount points between containers", correct: false }
-      - { value: "Process IDs between containers", correct: true }
-      - { value: "Network connections between containers", correct: false }
-      - { value: "User IDs for file permissions", correct: false }
+      - { value: 'Mount points between containers', correct: false }
+      - { value: 'Process IDs between containers', correct: true }
+      - { value: 'Network connections between containers', correct: false }
+      - { value: 'User IDs for file permissions', correct: false }
     help: https://docs.docker.com/enterprise/security/hardened-desktop/enhanced-container-isolation/
 
   - uuid: 5e2b7025-35e4-499e-9372-3d62297bdbfa
     question: What is the purpose of cgroups in Docker?
     answers:
-      - { value: "To limit and monitor container resource usage", correct: true }
-      - { value: "To define user permissions in containers", correct: false }
-      - { value: "To configure volume mounts", correct: false }
-      - { value: "To isolate system calls", correct: false }
+      - { value: 'To limit and monitor container resource usage', correct: true }
+      - { value: 'To define user permissions in containers', correct: false }
+      - { value: 'To configure volume mounts', correct: false }
+      - { value: 'To isolate system calls', correct: false }
     help: https://docs.docker.com/config/containers/resource_constraints/
 
   - uuid: 96b74db1-3736-4d0a-b1f6-12c258a5cb91
     question: Which of the following resources can be limited using cgroups?
     answers:
-      - { value: "File permissions", correct: false }
-      - { value: "Network encryption", correct: false }
-      - { value: "Shell access", correct: false }
-      - { value: "CPU, memory, and I/O", correct: true }
+      - { value: 'File permissions', correct: false }
+      - { value: 'Network encryption', correct: false }
+      - { value: 'Shell access', correct: false }
+      - { value: 'CPU, memory, and I/O', correct: true }
     help: https://docs.docker.com/config/containers/resource_constraints/
 
   - uuid: afdc1dc0-e24d-47ff-9252-991fa4e16b4b
     question: Which Docker flags configure cgroup limits for memory and CPU?
     answers:
-      - { value: "--memory and --cpus", correct: true }
-      - { value: "--isolate and --ns", correct: false }
-      - { value: "--limit and --priority", correct: false }
-      - { value: "--quota and --shares", correct: false }
+      - { value: '--memory and --cpus', correct: true }
+      - { value: '--isolate and --ns', correct: false }
+      - { value: '--limit and --priority', correct: false }
+      - { value: '--quota and --shares', correct: false }
     help: https://docs.docker.com/config/containers/resource_constraints/
 
   - uuid: 8ae69b41-06f0-44d2-b7ee-16a4e05bc758
     question: What is the role of certificates in Docker Engine TLS configuration?
     answers:
-      - { value: "To authenticate and encrypt communication between clients and daemons", correct: true }
-      - { value: "To generate Dockerfile builds", correct: false }
-      - { value: "To define swarm services", correct: false }
-      - { value: "To set resource limits", correct: false }
+      - { value: 'To authenticate and encrypt communication between clients and daemons', correct: true }
+      - { value: 'To generate Dockerfile builds', correct: false }
+      - { value: 'To define swarm services', correct: false }
+      - { value: 'To set resource limits', correct: false }
     help: https://docs.docker.com/engine/security/https/
 
   - uuid: 7627588e-c546-43d1-b8d4-5d38371981c7
     question: What command-line options are used to enable TLS on the Docker daemon?
     answers:
-      - { value: "--secure --keychain --trust", correct: false }
-      - { value: "--enable-https --auth-cert --auth-key", correct: false }
-      - { value: "--tlsverify --tlscacert --tlscert --tlskey", correct: true }
-      - { value: "--tlsauth --certpath --keyfile", correct: false }
+      - { value: '--secure --keychain --trust', correct: false }
+      - { value: '--enable-https --auth-cert --auth-key', correct: false }
+      - { value: '--tlsverify --tlscacert --tlscert --tlskey', correct: true }
+      - { value: '--tlsauth --certpath --keyfile', correct: false }
     help: https://docs.docker.com/engine/security/https/
 
   - uuid: d3c65bc2-15db-474e-b16e-1850d5888499
     question: Which certificate file is used to verify the client identity?
     answers:
-      - { value: "docker-trust.pem", correct: false }
-      - { value: "server-key.pem", correct: false }
-      - { value: "ca.pem", correct: false }
-      - { value: "client-cert.pem", correct: true }
+      - { value: 'docker-trust.pem', correct: false }
+      - { value: 'server-key.pem', correct: false }
+      - { value: 'ca.pem', correct: false }
+      - { value: 'client-cert.pem', correct: true }
     help: https://docs.docker.com/engine/security/https/
 
   - uuid: 1cc17ed0-2f0d-4a6a-9270-913415ef2b49
     question: What happens if a client connects without a valid certificate and TLS is enabled?
     answers:
-      - { value: "Docker logs a warning but allows access", correct: false }
-      - { value: "The connection is downgraded to HTTP", correct: false }
-      - { value: "The connection is refused", correct: true }
-      - { value: "Docker prompts for manual approval", correct: false }
+      - { value: 'Docker logs a warning but allows access', correct: false }
+      - { value: 'The connection is downgraded to HTTP', correct: false }
+      - { value: 'The connection is refused', correct: true }
+      - { value: 'Docker prompts for manual approval', correct: false }
     help: https://docs.docker.com/engine/security/https/
diff --git a/data/3_installation_and_configuration/describe_sizing_requirements_for_installation.yaml b/data/3_installation_and_configuration/describe_sizing_requirements_for_installation.yaml
index d4bbbae..73026b4 100644
--- a/data/3_installation_and_configuration/describe_sizing_requirements_for_installation.yaml
+++ b/data/3_installation_and_configuration/describe_sizing_requirements_for_installation.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: 915cfc8c-72d3-46a7-9797-fc980ef2452d
     question: What is the minimum recommended number of CPUs for installing Docker Universal Control Plane (UCP)?
     answers:
-      - { value: "4", correct: true }
-      - { value: "1", correct: false }
-      - { value: "2", correct: false }
-      - { value: "8", correct: false }
+      - { value: '4', correct: true }
+      - { value: '1', correct: false }
+      - { value: '2', correct: false }
+      - { value: '8', correct: false }
     help: https://docs.docker.com/ee/ucp/admin/install/system-requirements/
 
   - uuid: bbc16b4e-7291-4b64-9270-14b60c9a0d79
     question: What is the minimum amount of RAM recommended for a UCP manager node?
     answers:
-      - { value: "16 GB", correct: false }
-      - { value: "8 GB", correct: true }
-      - { value: "2 GB", correct: false }
-      - { value: "4 GB", correct: false }
+      - { value: '16 GB', correct: false }
+      - { value: '8 GB', correct: true }
+      - { value: '2 GB', correct: false }
+      - { value: '4 GB', correct: false }
     help: https://docs.docker.com/ee/ucp/admin/install/system-requirements/
 
   - uuid: 23d16894-3160-442e-b03d-90919a251929
     question: What storage backend is recommended for production-grade Docker deployments?
     answers:
-      - { value: "vfs", correct: false }
-      - { value: "btrfs", correct: false }
-      - { value: "aufs", correct: false }
-      - { value: "overlay2", correct: true }
+      - { value: 'vfs', correct: false }
+      - { value: 'btrfs', correct: false }
+      - { value: 'aufs', correct: false }
+      - { value: 'overlay2', correct: true }
     help: https://docs.docker.com/storage/storagedriver/overlayfs-driver/
 
   - uuid: 67a48e29-32c3-4267-a931-c08b3cb0531b
     question: For DTR (Docker Trusted Registry), what is the minimum disk space required per node?
     answers:
-      - { value: "50 GB", correct: false }
-      - { value: "100 GB", correct: true }
-      - { value: "10 GB", correct: false }
-      - { value: "20 GB", correct: false }
+      - { value: '50 GB', correct: false }
+      - { value: '100 GB', correct: true }
+      - { value: '10 GB', correct: false }
+      - { value: '20 GB', correct: false }
     help: https://docs.docker.com/ee/dtr/admin/install/system-requirements/
 
   - uuid: 5a75c1b2-0cbd-4fc2-83cf-1f189d84cc13
     question: Why is it recommended to run Docker on a 64-bit operating system?
     answers:
-      - { value: "It is required for GPU support", correct: false }
-      - { value: "To support graphical applications", correct: false }
-      - { value: "Docker only supports 64-bit CPUs", correct: true }
-      - { value: "To support encrypted volumes", correct: false }
+      - { value: 'It is required for GPU support', correct: false }
+      - { value: 'To support graphical applications', correct: false }
+      - { value: 'Docker only supports 64-bit CPUs', correct: true }
+      - { value: 'To support encrypted volumes', correct: false }
     help: https://docs.docker.com/engine/install/
 
   - uuid: 4f0a6e2e-58ef-45f7-86f3-1dd289b9bdee
     question: Which factor is most important when sizing disk for a Docker host?
     answers:
-      - { value: "The amount of GPU RAM", correct: false }
-      - { value: "The number and size of container images and volumes", correct: true }
-      - { value: "The number of CPUs available", correct: false }
-      - { value: "The number of open ports", correct: false }
+      - { value: 'The amount of GPU RAM', correct: false }
+      - { value: 'The number and size of container images and volumes', correct: true }
+      - { value: 'The number of CPUs available', correct: false }
+      - { value: 'The number of open ports', correct: false }
     help: https://docs.docker.com/storage/
 
   - uuid: b47a5e44-6c70-4534-a689-5ac4486938db
     question: Which of the following is a supported Linux distribution for production Docker deployments?
     answers:
-      - { value: "Windows 10 Home", correct: false }
-      - { value: "macOS", correct: false }
-      - { value: "Arch Linux", correct: false }
-      - { value: "CentOS 7 or higher", correct: true }
+      - { value: 'Windows 10 Home', correct: false }
+      - { value: 'macOS', correct: false }
+      - { value: 'Arch Linux', correct: false }
+      - { value: 'CentOS 7 or higher', correct: true }
     help: https://docs.docker.com/engine/install/
 
   - uuid: 9f7f1aeb-cfdf-4716-94a2-8c6c8d85f32c
     question: Why is it recommended to avoid using a root volume for Docker storage?
     answers:
-      - { value: "To prevent Docker from consuming the entire root filesystem", correct: true }
-      - { value: "It causes slow container startup", correct: false }
-      - { value: "Root volumes do not support overlay drivers", correct: false }
+      - { value: 'To prevent Docker from consuming the entire root filesystem', correct: true }
+      - { value: 'It causes slow container startup', correct: false }
+      - { value: 'Root volumes do not support overlay drivers', correct: false }
       - { value: "Security scanners can't access root volumes", correct: false }
     help: https://docs.docker.com/storage/
 
   - uuid: 05176b68-5a8b-4814-8753-ffec40440f12
     question: What is the typical port required to access UCP via a browser?
     answers:
-      - { value: "8080", correct: false }
-      - { value: "443", correct: true }
-      - { value: "1234", correct: false }
-      - { value: "2377", correct: false }
+      - { value: '8080', correct: false }
+      - { value: '443', correct: true }
+      - { value: '1234', correct: false }
+      - { value: '2377', correct: false }
     help: https://docs.docker.com/ee/ucp/admin/install/system-requirements/
 
   - uuid: 3ebadf1d-31d8-4e68-9626-58cc94a2bd6d
     question: When planning a Docker installation, why is it important to consider the total number of containers?
     answers:
-      - { value: "Each container consumes CPU, memory, and storage resources", correct: true }
-      - { value: "Containers run only one at a time", correct: false }
-      - { value: "More containers require fewer ports", correct: false }
-      - { value: "Each container opens a new TCP connection", correct: false }
+      - { value: 'Each container consumes CPU, memory, and storage resources', correct: true }
+      - { value: 'Containers run only one at a time', correct: false }
+      - { value: 'More containers require fewer ports', correct: false }
+      - { value: 'Each container opens a new TCP connection', correct: false }
     help: https://docs.docker.com/config/containers/resource_constraints/
diff --git a/data/3_installation_and_configuration/hub_users_teams.yaml b/data/3_installation_and_configuration/hub_users_teams.yaml
index 128b416..ddc9c76 100644
--- a/data/3_installation_and_configuration/hub_users_teams.yaml
+++ b/data/3_installation_and_configuration/hub_users_teams.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: 26f0f3f7-8840-4b76-9137-2d18f4f4aa71
     question: Where can users and teams be managed in the official Docker environment?
     answers:
-      - { value: "In the /etc/docker/teams.conf file", correct: false }
-      - { value: "On Docker Hub (hub.docker.com)", correct: true }
-      - { value: "With the docker user command", correct: false }
-      - { value: "Via docker-compose.yml", correct: false }
+      - { value: 'In the /etc/docker/teams.conf file', correct: false }
+      - { value: 'On Docker Hub (hub.docker.com)', correct: true }
+      - { value: 'With the docker user command', correct: false }
+      - { value: 'Via docker-compose.yml', correct: false }
     help: https://docs.docker.com/docker-hub/orgs/
 
   - uuid: 6c5cb1df-4b49-4c4a-9cf9-2a1d2e53f726
     question: Which Docker Hub role allows managing teams, users, and repositories?
     answers:
-      - { value: "Developer", correct: false }
-      - { value: "Operator", correct: false }
-      - { value: "Owner", correct: true }
-      - { value: "Viewer", correct: false }
+      - { value: 'Developer', correct: false }
+      - { value: 'Operator', correct: false }
+      - { value: 'Owner', correct: true }
+      - { value: 'Viewer', correct: false }
     help: https://docs.docker.com/docker-hub/orgs/
 
   - uuid: f62a7754-9f5c-4a91-b5a0-1ea45b343624
     question: Can a Docker Hub user belong to multiple organizations?
     answers:
-      - { value: "Yes, but only with a paid account", correct: false }
-      - { value: "No, a user is tied to only one organization", correct: false }
-      - { value: "No, except with Docker Enterprise", correct: false }
-      - { value: "Yes", correct: true }
+      - { value: 'Yes, but only with a paid account', correct: false }
+      - { value: 'No, a user is tied to only one organization', correct: false }
+      - { value: 'No, except with Docker Enterprise', correct: false }
+      - { value: 'Yes', correct: true }
     help: https://docs.docker.com/docker-hub/orgs/
 
   - uuid: b1e32769-f6e6-49df-98ef-67ce6df7d8a9
     question: Which action creates a team in Docker Hub?
     answers:
-      - { value: "Create a special tag in an image", correct: false }
-      - { value: "Use docker team create", correct: false }
-      - { value: "Edit the dockerhub.yaml file", correct: false }
-      - { value: "Go to Organization > Teams > Create Team", correct: true }
+      - { value: 'Create a special tag in an image', correct: false }
+      - { value: 'Use docker team create', correct: false }
+      - { value: 'Edit the dockerhub.yaml file', correct: false }
+      - { value: 'Go to Organization > Teams > Create Team', correct: true }
     help: https://docs.docker.com/docker-hub/orgs/
 
   - uuid: 36276f44-008f-4b37-975c-e1c51ae9e0f0
     question: What is the primary purpose of teams in Docker Hub?
     answers:
-      - { value: "Assign disk quotas", correct: false }
-      - { value: "Create automatic Swarm clusters", correct: false }
-      - { value: "Enable automatic image updates", correct: false }
-      - { value: "Manage repository access permissions for multiple users", correct: true }
+      - { value: 'Assign disk quotas', correct: false }
+      - { value: 'Create automatic Swarm clusters', correct: false }
+      - { value: 'Enable automatic image updates', correct: false }
+      - { value: 'Manage repository access permissions for multiple users', correct: true }
     help: https://docs.docker.com/docker-hub/orgs/
 
   - uuid: a5ad3090-1b29-4c61-b08c-02839f19ef17
     question: What access levels are available on a Docker Hub repository?
     answers:
-      - { value: "Execute, Modify, Full", correct: false }
-      - { value: "Public, Private, Restricted", correct: false }
-      - { value: "Guest, Developer, Owner", correct: false }
-      - { value: "Read, Write, Admin", correct: true }
+      - { value: 'Execute, Modify, Full', correct: false }
+      - { value: 'Public, Private, Restricted', correct: false }
+      - { value: 'Guest, Developer, Owner', correct: false }
+      - { value: 'Read, Write, Admin', correct: true }
     help: https://docs.docker.com/docker-hub/repos/
 
   - uuid: 2e83b0c4-8a9d-49cd-9968-62d86f032173
     question: Can a Docker Hub team member with Read access push an image?
     answers:
-      - { value: "Yes, if logged in with Docker CLI", correct: false }
-      - { value: "No", correct: true }
-      - { value: "Yes, if the image is public", correct: false }
-      - { value: "Yes, but only once", correct: false }
+      - { value: 'Yes, if logged in with Docker CLI', correct: false }
+      - { value: 'No', correct: true }
+      - { value: 'Yes, if the image is public', correct: false }
+      - { value: 'Yes, but only once', correct: false }
     help: https://docs.docker.com/docker-hub/orgs/
 
   - uuid: 0db6c25b-4b1f-497e-8c2c-18a22d7d92aa
     question: Can a Docker user have a personal repository and also belong to an organization?
     answers:
-      - { value: "Yes", correct: true }
-      - { value: "Only if the account is verified", correct: false }
-      - { value: "Only with Docker Desktop Pro", correct: false }
-      - { value: "No, it is exclusive", correct: false }
+      - { value: 'Yes', correct: true }
+      - { value: 'Only if the account is verified', correct: false }
+      - { value: 'Only with Docker Desktop Pro', correct: false }
+      - { value: 'No, it is exclusive', correct: false }
     help: https://docs.docker.com/docker-hub/repos/
 
   - uuid: a8871731-8364-4db4-b41e-1dcd9f78e0c7
     question: Which command is used to log in to Docker Hub from the command line?
     answers:
-      - { value: "docker login", correct: true }
-      - { value: "docker auth", correct: false }
-      - { value: "docker connect hub", correct: false }
-      - { value: "docker user login", correct: false }
+      - { value: 'docker login', correct: true }
+      - { value: 'docker auth', correct: false }
+      - { value: 'docker connect hub', correct: false }
+      - { value: 'docker user login', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/login/
 
   - uuid: c4cbe3c6-77ef-4cb5-9f66-1e95cc167d50
     question: Can a user see all private repositories of a Docker Hub organization?
     answers:
-      - { value: "Only if their team has explicit access", correct: true }
-      - { value: "No, never", correct: false }
-      - { value: "Yes, automatically", correct: false }
-      - { value: "Yes, but only with read access", correct: false }
+      - { value: 'Only if their team has explicit access', correct: true }
+      - { value: 'No, never', correct: false }
+      - { value: 'Yes, automatically', correct: false }
+      - { value: 'Yes, but only with read access', correct: false }
     help: https://docs.docker.com/docker-hub/orgs/
diff --git a/data/3_installation_and_configuration/install_storage_driver.yaml b/data/3_installation_and_configuration/install_storage_driver.yaml
index 94f8ac9..6bb5a03 100644
--- a/data/3_installation_and_configuration/install_storage_driver.yaml
+++ b/data/3_installation_and_configuration/install_storage_driver.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: 4c2ef7b9-4e34-41cc-ae5f-d84b73d08e4d
     question: Which command is recommended to configure the official Docker repository on a Debian/Ubuntu machine?
     answers:
-      - { value: "apt-add-repository docker", correct: false }
-      - { value: "curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg", correct: true }
-      - { value: "add-apt-repo docker", correct: false }
-      - { value: "yum install docker", correct: false }
+      - { value: 'apt-add-repository docker', correct: false }
+      - { value: 'curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg', correct: true }
+      - { value: 'add-apt-repo docker', correct: false }
+      - { value: 'yum install docker', correct: false }
     help: https://docs.docker.com/engine/install/ubuntu/
 
   - uuid: d08278d5-ef35-487a-b0b6-7e544bff2bb0
     question: Which package should be installed on Ubuntu after configuring the Docker repository?
     answers:
-      - { value: "docker-engine", correct: false }
-      - { value: "docker-compose", correct: false }
-      - { value: "docker.io", correct: false }
-      - { value: "docker-ce", correct: true }
+      - { value: 'docker-engine', correct: false }
+      - { value: 'docker-compose', correct: false }
+      - { value: 'docker.io', correct: false }
+      - { value: 'docker-ce', correct: true }
     help: https://docs.docker.com/engine/install/ubuntu/
 
   - uuid: 6c1d848e-7e13-4b3a-97ee-3772b251e749
     question: Which command configures the Docker repository on CentOS or RHEL?
     answers:
-      - { value: "docker setup", correct: false }
-      - { value: "add-apt-repository docker-ce", correct: false }
-      - { value: "yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo", correct: true }
-      - { value: "dnf enable docker", correct: false }
+      - { value: 'docker setup', correct: false }
+      - { value: 'add-apt-repository docker-ce', correct: false }
+      - { value: 'yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo', correct: true }
+      - { value: 'dnf enable docker', correct: false }
     help: https://docs.docker.com/engine/install/centos/
 
   - uuid: 18e5192f-0057-4f80-a681-882e199ad55d
     question: What is the default recommended storage driver on modern Linux distributions?
     answers:
-      - { value: "devicemapper", correct: false }
-      - { value: "overlay2", correct: true }
-      - { value: "aufs", correct: false }
-      - { value: "btrfs", correct: false }
+      - { value: 'devicemapper', correct: false }
+      - { value: 'overlay2', correct: true }
+      - { value: 'aufs', correct: false }
+      - { value: 'btrfs', correct: false }
     help: https://docs.docker.com/storage/storagedriver/overlayfs-driver/
 
   - uuid: b8704b3c-d6fd-4a6b-810f-7b94b8a869be
     question: Which command shows the storage driver currently used by Docker?
     answers:
-      - { value: "docker info", correct: true }
-      - { value: "docker volume inspect", correct: false }
-      - { value: "docker system inspect", correct: false }
-      - { value: "docker storage status", correct: false }
+      - { value: 'docker info', correct: true }
+      - { value: 'docker volume inspect', correct: false }
+      - { value: 'docker system inspect', correct: false }
+      - { value: 'docker storage status', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/info/
 
   - uuid: 33dd5094-4211-4229-8459-0a75be296c37
     question: Which file can be edited to force Docker to use a specific storage driver?
     answers:
-      - { value: "/etc/docker-engine.conf", correct: false }
-      - { value: "/etc/docker/daemon.json", correct: true }
-      - { value: "/var/lib/docker/driver.config", correct: false }
-      - { value: "/etc/docker/driver.conf", correct: false }
+      - { value: '/etc/docker-engine.conf', correct: false }
+      - { value: '/etc/docker/daemon.json', correct: true }
+      - { value: '/var/lib/docker/driver.config', correct: false }
+      - { value: '/etc/docker/driver.conf', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/dockerd/#daemon-configuration-file
 
   - uuid: 9b10cfa6-40f2-4be1-bcc2-fbd0b8e1ff7c
     question: Which JSON parameter sets the storage driver in the Docker daemon?
     answers:
-      - { value: "`volume-driver`: `zfs`", correct: false }
-      - { value: "`storage`: `devicemapper`", correct: false }
-      - { value: "`storage-driver`: `overlay2`", correct: true }
-      - { value: "`driver`: `aufs`", correct: false }
+      - { value: '`volume-driver`: `zfs`', correct: false }
+      - { value: '`storage`: `devicemapper`', correct: false }
+      - { value: '`storage-driver`: `overlay2`', correct: true }
+      - { value: '`driver`: `aufs`', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/dockerd/#daemon-configuration-file
 
   - uuid: 261f97d5-38fa-48fa-8365-58e8439b4495
     question: What prerequisite is often required to use the `overlay2` driver?
     answers:
-      - { value: "docker-compose must be installed", correct: false }
-      - { value: "None, it always works", correct: false }
-      - { value: "The filesystem must be `xfs` or `ext4` with d_type enabled", correct: true }
-      - { value: "The kernel must be version 3.2 or lower", correct: false }
+      - { value: 'docker-compose must be installed', correct: false }
+      - { value: 'None, it always works', correct: false }
+      - { value: 'The filesystem must be `xfs` or `ext4` with d_type enabled', correct: true }
+      - { value: 'The kernel must be version 3.2 or lower', correct: false }
     help: https://docs.docker.com/storage/storagedriver/overlayfs-driver/#prerequisites
 
   - uuid: 93f4b6d9-0e4f-4adf-9101-2a9fc6a1ea4c
     question: On Windows, how is Docker Desktop installed?
     answers:
-      - { value: "Run apt install docker-desktop", correct: false }
-      - { value: "Download the installer from the official website and run the graphical installation", correct: true }
-      - { value: "Run docker install --windows", correct: false }
-      - { value: "Run choco install docker-ce", correct: false }
+      - { value: 'Run apt install docker-desktop', correct: false }
+      - { value: 'Download the installer from the official website and run the graphical installation', correct: true }
+      - { value: 'Run docker install --windows', correct: false }
+      - { value: 'Run choco install docker-ce', correct: false }
     help: https://docs.docker.com/desktop/install/windows-install/
 
   - uuid: 50c16d73-0998-45d3-aef4-37e7168fdddb
     question: Which command is used to start Docker after installation on a Linux distribution?
     answers:
-      - { value: "docker start", correct: false }
-      - { value: "sudo docker init", correct: false }
-      - { value: "sudo systemctl start docker", correct: true }
-      - { value: "service docker launch", correct: false }
+      - { value: 'docker start', correct: false }
+      - { value: 'sudo docker init', correct: false }
+      - { value: 'sudo systemctl start docker', correct: true }
+      - { value: 'service docker launch', correct: false }
     help: https://docs.docker.com/engine/install/linux-postinstall/
diff --git a/data/3_installation_and_configuration/install_troubleshooting.yaml b/data/3_installation_and_configuration/install_troubleshooting.yaml
index b83698e..ae6918d 100644
--- a/data/3_installation_and_configuration/install_troubleshooting.yaml
+++ b/data/3_installation_and_configuration/install_troubleshooting.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: 153dc1e3-f5be-4d8f-a4b3-498b8378fd52
     question: What does the error 'Cannot connect to the Docker daemon. Is the docker daemon running?' mean?
     answers:
-      - { value: "The Docker service is not running or the user lacks permissions", correct: true }
-      - { value: "The Docker daemon is using a non-standard port", correct: false }
-      - { value: "The requested image does not exist", correct: false }
-      - { value: "A Docker command was misspelled", correct: false }
+      - { value: 'The Docker service is not running or the user lacks permissions', correct: true }
+      - { value: 'The Docker daemon is using a non-standard port', correct: false }
+      - { value: 'The requested image does not exist', correct: false }
+      - { value: 'A Docker command was misspelled', correct: false }
     help: https://docs.docker.com/config/daemon/#start-the-daemon
 
   - uuid: 238c3d02-c1c4-4f77-97a0-146d472928e7
     question: Which command checks if the Docker service is active on a Linux machine?
     answers:
-      - { value: "docker check daemon", correct: false }
-      - { value: "sudo systemctl status docker", correct: true }
-      - { value: "docker status all", correct: false }
-      - { value: "docker is-alive", correct: false }
+      - { value: 'docker check daemon', correct: false }
+      - { value: 'sudo systemctl status docker', correct: true }
+      - { value: 'docker status all', correct: false }
+      - { value: 'docker is-alive', correct: false }
     help: https://docs.docker.com/config/daemon/#start-the-daemon
 
   - uuid: c2c92cc6-e8d0-43f5-a44a-ea3e64f0f63e
     question: How do you resolve a 'permission denied' error when running `docker run` as a non-root user?
     answers:
-      - { value: "Restart the container in debug mode", correct: false }
-      - { value: "Add the user to the docker group", correct: true }
-      - { value: "Reinstall Docker completely", correct: false }
-      - { value: "Change the storage driver", correct: false }
+      - { value: 'Restart the container in debug mode', correct: false }
+      - { value: 'Add the user to the docker group', correct: true }
+      - { value: 'Reinstall Docker completely', correct: false }
+      - { value: 'Change the storage driver', correct: false }
     help: https://docs.docker.com/engine/install/linux-postinstall/
 
   - uuid: 7cb30853-d97b-4fd0-a6e9-70950dc42e2d
     question: Which command displays system and daemon configuration information for Docker?
     answers:
-      - { value: "docker info", correct: true }
-      - { value: "docker engine show", correct: false }
-      - { value: "docker config", correct: false }
-      - { value: "docker version --all", correct: false }
+      - { value: 'docker info', correct: true }
+      - { value: 'docker engine show', correct: false }
+      - { value: 'docker config', correct: false }
+      - { value: 'docker version --all', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/info/
 
   - uuid: 3cf6a598-85c2-43b4-b7c7-91a51283c3db
     question: 'If `docker build` fails with `unsupported driver: aufs`, what should be done?'
     answers:
-      - { value: "Reinstall volumes", correct: false }
-      - { value: "Restart the container", correct: false }
-      - { value: "Update docker-compose", correct: false }
-      - { value: "Switch the driver to overlay2", correct: true }
+      - { value: 'Reinstall volumes', correct: false }
+      - { value: 'Restart the container', correct: false }
+      - { value: 'Update docker-compose', correct: false }
+      - { value: 'Switch the driver to overlay2', correct: true }
     help: https://docs.docker.com/storage/storagedriver/select-storage-driver/
 
   - uuid: f4e1cb0c-2e15-4f09-a06d-2aa84383f05e
     question: Which command shows the Docker service logs on a system using systemd?
     answers:
-      - { value: "journalctl -u docker", correct: true }
-      - { value: "systemctl logs docker", correct: false }
-      - { value: "docker logs docker", correct: false }
-      - { value: "docker show-log", correct: false }
+      - { value: 'journalctl -u docker', correct: true }
+      - { value: 'systemctl logs docker', correct: false }
+      - { value: 'docker logs docker', correct: false }
+      - { value: 'docker show-log', correct: false }
     help: https://docs.docker.com/config/daemon/#troubleshoot-the-daemon
 
   - uuid: 610ff302-cb2e-4d94-a4f2-9a0d2df460cf
     question: What should you check if Docker installation fails due to missing repositories on Ubuntu?
     answers:
-      - { value: "Uninstall all system packages", correct: false }
-      - { value: "Switch to another distribution", correct: false }
-      - { value: "Change the Linux kernel", correct: false }
-      - { value: "Verify that the official Docker repository is added with the correct GPG key", correct: true }
+      - { value: 'Uninstall all system packages', correct: false }
+      - { value: 'Switch to another distribution', correct: false }
+      - { value: 'Change the Linux kernel', correct: false }
+      - { value: 'Verify that the official Docker repository is added with the correct GPG key', correct: true }
     help: https://docs.docker.com/engine/install/ubuntu/
 
   - uuid: e688309b-9bde-4437-8f5c-0d5a3a9fbd79
     question: What error occurs if Docker is installed on a filesystem not compatible with overlay2?
     answers:
-      - { value: "Error starting daemon: overlay2 not supported", correct: true }
-      - { value: "No route to host", correct: false }
-      - { value: "TLS handshake failed", correct: false }
-      - { value: "daemon.json malformed", correct: false }
+      - { value: 'Error starting daemon: overlay2 not supported', correct: true }
+      - { value: 'No route to host', correct: false }
+      - { value: 'TLS handshake failed', correct: false }
+      - { value: 'daemon.json malformed', correct: false }
     help: https://docs.docker.com/storage/storagedriver/overlayfs-driver/#prerequisites
 
   - uuid: 58b58043-18f8-44cd-8328-fbb91a92d65c
     question: What is a common cause of the error 'Got permission denied while trying to connect to the Docker daemon socket'?
     answers:
-      - { value: "Docker is incorrectly installed on Windows", correct: false }
-      - { value: "The user is not in the docker group", correct: true }
-      - { value: "The image is corrupted", correct: false }
-      - { value: "The network is misconfigured", correct: false }
+      - { value: 'Docker is incorrectly installed on Windows', correct: false }
+      - { value: 'The user is not in the docker group', correct: true }
+      - { value: 'The image is corrupted', correct: false }
+      - { value: 'The network is misconfigured', correct: false }
     help: https://docs.docker.com/engine/install/linux-postinstall/
 
   - uuid: 7ed640e0-d2e6-4209-83de-3c3ef3ce19f1
     question: If Docker fails to start due to an error in `daemon.json`, what should be checked?
     answers:
-      - { value: "The number of images present", correct: false }
-      - { value: "The JSON syntax of the file (e.g., commas, brackets, quotes)", correct: true }
-      - { value: "Available disk space", correct: false }
-      - { value: "The log level in containers", correct: false }
+      - { value: 'The number of images present', correct: false }
+      - { value: 'The JSON syntax of the file (e.g., commas, brackets, quotes)', correct: true }
+      - { value: 'Available disk space', correct: false }
+      - { value: 'The log level in containers', correct: false }
     help: https://docs.docker.com/config/daemon/#troubleshoot-the-daemon
diff --git a/data/3_installation_and_configuration/logging_drivers.yaml b/data/3_installation_and_configuration/logging_drivers.yaml
index 65a149c..932cb7e 100644
--- a/data/3_installation_and_configuration/logging_drivers.yaml
+++ b/data/3_installation_and_configuration/logging_drivers.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: 8f6f353b-0c99-47df-ae3b-6e61864ec106
     question: Which parameter specifies a log driver when launching a container?
     answers:
-      - { value: "--logging", correct: false }
-      - { value: "--driver-log", correct: false }
-      - { value: "--log", correct: false }
-      - { value: "--log-driver", correct: true }
+      - { value: '--logging', correct: false }
+      - { value: '--driver-log', correct: false }
+      - { value: '--log', correct: false }
+      - { value: '--log-driver', correct: true }
     help: https://docs.docker.com/config/containers/logging/configure/
 
   - uuid: 43fd04d9-df6b-4f17-b682-46429a24a537
     question: Which file configures the default global log driver?
     answers:
-      - { value: "/usr/local/docker/logging.json", correct: false }
-      - { value: "/etc/docker/containers/logging.conf", correct: false }
-      - { value: "/etc/logging.conf", correct: false }
-      - { value: "/etc/docker/daemon.json", correct: true }
+      - { value: '/usr/local/docker/logging.json', correct: false }
+      - { value: '/etc/docker/containers/logging.conf', correct: false }
+      - { value: '/etc/logging.conf', correct: false }
+      - { value: '/etc/docker/daemon.json', correct: true }
     help: https://docs.docker.com/config/containers/logging/configure/
 
   - uuid: a0629d6c-313c-4e3b-a2d2-e1122859c3f5
     question: Which value sets `journald` as the log driver for a Docker container?
     answers:
-      - { value: "journald", correct: true }
-      - { value: "docker-logs", correct: false }
-      - { value: "syslogd", correct: false }
-      - { value: "systemd-logs", correct: false }
+      - { value: 'journald', correct: true }
+      - { value: 'docker-logs', correct: false }
+      - { value: 'syslogd', correct: false }
+      - { value: 'systemd-logs', correct: false }
     help: https://docs.docker.com/config/containers/logging/journald/
 
   - uuid: 50e888f9-d205-4de7-8054-bb7409d504d6
     question: What is Docker’s default log driver?
     answers:
-      - { value: "none", correct: false }
-      - { value: "journald", correct: false }
-      - { value: "syslog", correct: false }
-      - { value: "json-file", correct: true }
+      - { value: 'none', correct: false }
+      - { value: 'journald', correct: false }
+      - { value: 'syslog', correct: false }
+      - { value: 'json-file', correct: true }
     help: https://docs.docker.com/config/containers/logging/configure/
 
   - uuid: 5d3c3e90-0f03-4f2e-9d02-b8d52ed9f146
     question: Which JSON configuration sets journald as the global log driver?
     answers:
-      - { value: "{ `logging-driver`: `journald` }", correct: false }
-      - { value: "{ `driver`: `journald` }", correct: false }
-      - { value: "{ `log-driver`: `journald` }", correct: true }
-      - { value: "{ `logs`: `journald` }", correct: false }
+      - { value: '{ `logging-driver`: `journald` }', correct: false }
+      - { value: '{ `driver`: `journald` }', correct: false }
+      - { value: '{ `log-driver`: `journald` }', correct: true }
+      - { value: '{ `logs`: `journald` }', correct: false }
     help: https://docs.docker.com/config/containers/logging/configure/
 
   - uuid: 1ec259ae-b1f6-4a4d-91f2-697d63b37823
     question: Quel driver de logs est utilisé pour envoyer les logs vers une instance Splunk ?
     answers:
-      - { value: "logstash", correct: false }
-      - { value: "splunk", correct: true }
-      - { value: "fluentd", correct: false }
-      - { value: "gelf", correct: false }
+      - { value: 'logstash', correct: false }
+      - { value: 'splunk', correct: true }
+      - { value: 'fluentd', correct: false }
+      - { value: 'gelf', correct: false }
     help: https://docs.docker.com/config/containers/logging/splunk/
 
   - uuid: 91e16669-03b9-47ef-a93e-7e6c84cf4fe4
     question: Quel paramètre est requis pour le driver `splunk` ?
     answers:
-      - { value: "splunk-user", correct: false }
-      - { value: "splunk-port", correct: false }
-      - { value: "splunk-token", correct: true }
-      - { value: "splunk-password", correct: false }
+      - { value: 'splunk-user', correct: false }
+      - { value: 'splunk-port', correct: false }
+      - { value: 'splunk-token', correct: true }
+      - { value: 'splunk-password', correct: false }
     help: https://docs.docker.com/config/containers/logging/splunk/
 
   - uuid: b0b7b3d6-dca0-40d7-881a-e0d1e8e6d7c7
     question: Quelle commande permet de lancer un conteneur avec un driver de log personnalisé ?
     answers:
-      - { value: "docker start --driver-log=syslog nginx", correct: false }
-      - { value: "docker run --log-driver=syslog nginx", correct: true }
-      - { value: "docker logs --driver=syslog nginx", correct: false }
-      - { value: "docker create --log=syslog nginx", correct: false }
+      - { value: 'docker start --driver-log=syslog nginx', correct: false }
+      - { value: 'docker run --log-driver=syslog nginx', correct: true }
+      - { value: 'docker logs --driver=syslog nginx', correct: false }
+      - { value: 'docker create --log=syslog nginx', correct: false }
     help: https://docs.docker.com/config/containers/logging/configure/
 
   - uuid: 03e1fa7d-1e62-4ea3-a07f-b8912c51bb77
     question: Que se passe-t-il si un driver de logs est mal configuré au lancement d’un conteneur ?
     answers:
-      - { value: "Docker remplace automatiquement par le driver `json-file`", correct: false }
-      - { value: "Docker lance le conteneur avec syslog en fallback", correct: false }
-      - { value: "Le conteneur ne démarre pas et une erreur s’affiche", correct: true }
-      - { value: "Le conteneur démarre mais les logs sont perdus", correct: false }
+      - { value: 'Docker remplace automatiquement par le driver `json-file`', correct: false }
+      - { value: 'Docker lance le conteneur avec syslog en fallback', correct: false }
+      - { value: 'Le conteneur ne démarre pas et une erreur s’affiche', correct: true }
+      - { value: 'Le conteneur démarre mais les logs sont perdus', correct: false }
     help: https://docs.docker.com/config/containers/logging/configure/
 
   - uuid: 17b2435a-4b75-423c-85ec-e24a91b2ad52
     question: Quel driver de log permet d’ignorer complètement les logs d’un conteneur ?
     answers:
-      - { value: "off", correct: false }
-      - { value: "null", correct: false }
-      - { value: "disabled", correct: false }
-      - { value: "none", correct: true }
+      - { value: 'off', correct: false }
+      - { value: 'null', correct: false }
+      - { value: 'disabled', correct: false }
+      - { value: 'none', correct: true }
     help: https://docs.docker.com/engine/logging/configure/#configure-the-logging-driver-for-a-container
diff --git a/data/3_installation_and_configuration/swarm_setup_backup.yaml b/data/3_installation_and_configuration/swarm_setup_backup.yaml
index 87bf500..1b17fcd 100644
--- a/data/3_installation_and_configuration/swarm_setup_backup.yaml
+++ b/data/3_installation_and_configuration/swarm_setup_backup.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: 4973f403-8b26-4e44-b29f-169fbf9a0de1
     question: Which command initializes a Docker Swarm cluster?
     answers:
-      - { value: "docker service init", correct: false }
-      - { value: "docker swarm create", correct: false }
-      - { value: "docker cluster init", correct: false }
-      - { value: "docker swarm init", correct: true }
+      - { value: 'docker service init', correct: false }
+      - { value: 'docker swarm create', correct: false }
+      - { value: 'docker cluster init', correct: false }
+      - { value: 'docker swarm init', correct: true }
     help: https://docs.docker.com/engine/reference/commandline/swarm_init/
 
   - uuid: e1cd0de6-6f4f-4e41-a0c6-63ce3e6e39fd
     question: Which command lets another node join a Swarm cluster as a worker?
     answers:
-      - { value: "docker join swarm worker", correct: false }
-      - { value: "docker node join worker", correct: false }
-      - { value: "docker swarm join --token <worker-token> <manager-ip>:2377", correct: true }
-      - { value: "docker swarm attach", correct: false }
+      - { value: 'docker join swarm worker', correct: false }
+      - { value: 'docker node join worker', correct: false }
+      - { value: 'docker swarm join --token <worker-token> <manager-ip>:2377', correct: true }
+      - { value: 'docker swarm attach', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/swarm_join/
 
   - uuid: 63a25dc4-0164-4c28-b4cf-139017a57939
     question: Which command promotes a worker node to manager?
     answers:
-      - { value: "docker node add-manager <node>", correct: false }
-      - { value: "docker swarm promote <node>", correct: false }
-      - { value: "docker manager add <node>", correct: false }
-      - { value: "docker node promote <node>", correct: true }
+      - { value: 'docker node add-manager <node>', correct: false }
+      - { value: 'docker swarm promote <node>', correct: false }
+      - { value: 'docker manager add <node>', correct: false }
+      - { value: 'docker node promote <node>', correct: true }
     help: https://docs.docker.com/engine/reference/commandline/node_promote/
 
   - uuid: 2e9eeadd-14ea-4038-82cd-0192a25f8b6c
     question: What does the `docker swarm join-token` command do?
     answers:
-      - { value: "Create a new cluster", correct: false }
-      - { value: "Show Swarm service logs", correct: false }
-      - { value: "Configure cluster listening ports", correct: false }
-      - { value: "Display or regenerate the token to join a Swarm cluster", correct: true }
+      - { value: 'Create a new cluster', correct: false }
+      - { value: 'Show Swarm service logs', correct: false }
+      - { value: 'Configure cluster listening ports', correct: false }
+      - { value: 'Display or regenerate the token to join a Swarm cluster', correct: true }
     help: https://docs.docker.com/engine/reference/commandline/swarm_join_token/
 
   - uuid: 44c3eb41-e7c7-4a16-aee3-1ee5c5cf41cb
     question: What is the minimum number of managers required for a Swarm cluster to maintain quorum?
     answers:
-      - { value: "A single manager is always enough", correct: false }
-      - { value: "The majority of managers (N/2 + 1)", correct: true }
-      - { value: "At least two managers", correct: false }
-      - { value: "All nodes", correct: false }
+      - { value: 'A single manager is always enough', correct: false }
+      - { value: 'The majority of managers (N/2 + 1)', correct: true }
+      - { value: 'At least two managers', correct: false }
+      - { value: 'All nodes', correct: false }
     help: https://docs.docker.com/engine/swarm/admin_guide/#maintain-quorum
 
   - uuid: 1969a49a-ec30-486b-8960-62a4f80a77a2
     question: Which path contains critical Swarm cluster metadata?
     answers:
-      - { value: "/var/run/docker/swarm", correct: false }
-      - { value: "/opt/docker/swarm/raft", correct: false }
-      - { value: "/etc/docker/swarm", correct: false }
-      - { value: "/var/lib/docker/swarm", correct: true }
+      - { value: '/var/run/docker/swarm', correct: false }
+      - { value: '/opt/docker/swarm/raft', correct: false }
+      - { value: '/etc/docker/swarm', correct: false }
+      - { value: '/var/lib/docker/swarm', correct: true }
     help: https://docs.docker.com/engine/swarm/admin_guide/#backup-and-recovery
 
   - uuid: e7e05c8d-1786-48ee-a6a5-e96a94d93f17
     question: Which method manually backs up a Swarm cluster?
     answers:
-      - { value: "Commit an image on each node", correct: false }
-      - { value: "Export all services with docker-compose", correct: false }
-      - { value: "Run docker backup cluster", correct: false }
-      - { value: "Stop Docker and copy /var/lib/docker/swarm", correct: true }
+      - { value: 'Commit an image on each node', correct: false }
+      - { value: 'Export all services with docker-compose', correct: false }
+      - { value: 'Run docker backup cluster', correct: false }
+      - { value: 'Stop Docker and copy /var/lib/docker/swarm', correct: true }
     help: https://docs.docker.com/engine/swarm/admin_guide/#backup-and-recovery
 
   - uuid: c4ae7fd3-8cf5-4b43-9dbb-944877e2b198
     question: What must be done before restoring a Swarm backup?
     answers:
-      - { value: "Run docker init --restore", correct: false }
-      - { value: "Run docker service pause", correct: false }
-      - { value: "Remove all running containers", correct: false }
-      - { value: "Ensure Docker is stopped on the target node", correct: true }
+      - { value: 'Run docker init --restore', correct: false }
+      - { value: 'Run docker service pause', correct: false }
+      - { value: 'Remove all running containers', correct: false }
+      - { value: 'Ensure Docker is stopped on the target node', correct: true }
     help: https://docs.docker.com/engine/swarm/admin_guide/#backup-and-recovery
 
   - uuid: b1830b39-b7ce-49c8-9a0b-620fcb72855a
     question: What does the `docker node ls` command show in a Swarm cluster?
     answers:
-      - { value: "List all active services", correct: false }
-      - { value: "List nodes and their roles (manager/worker)", correct: true }
-      - { value: "List registries in use", correct: false }
-      - { value: "List volumes attached to containers", correct: false }
+      - { value: 'List all active services', correct: false }
+      - { value: 'List nodes and their roles (manager/worker)', correct: true }
+      - { value: 'List registries in use', correct: false }
+      - { value: 'List volumes attached to containers', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/node_ls/
 
   - uuid: 70a10577-6ee7-456c-a77a-23c8e46f9c36
     question: Can a worker node be used to schedule a global service in Swarm?
     answers:
-      - { value: "No, unless the service is defined as replica", correct: false }
-      - { value: "Yes, but only for containers without a network", correct: false }
-      - { value: "No, only managers can run services", correct: false }
-      - { value: "Yes, if included in the service constraints", correct: true }
+      - { value: 'No, unless the service is defined as replica', correct: false }
+      - { value: 'Yes, but only for containers without a network', correct: false }
+      - { value: 'No, only managers can run services', correct: false }
+      - { value: 'Yes, if included in the service constraints', correct: true }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/
diff --git a/data/4_Networking/bridge_network_create.yaml b/data/4_Networking/bridge_network_create.yaml
index 11f7681..a3a472d 100644
--- a/data/4_Networking/bridge_network_create.yaml
+++ b/data/4_Networking/bridge_network_create.yaml
@@ -2,80 +2,80 @@ questions:
   - uuid: 09c6e9c3-bbd5-40dc-86a2-5f496e9d16ee
     question: Which Docker command is used to create a user-defined bridge network?
     answers:
-      - { value: "docker create network --bridge dev-net", correct: false }
-      - { value: "docker network create --driver bridge dev-net", correct: true }
-      - { value: "docker bridge create dev-net", correct: false }
-      - { value: "docker network init dev-net --type=bridge", correct: false }
+      - { value: 'docker create network --bridge dev-net', correct: false }
+      - { value: 'docker network create --driver bridge dev-net', correct: true }
+      - { value: 'docker bridge create dev-net', correct: false }
+      - { value: 'docker network init dev-net --type=bridge', correct: false }
     help: https://docs.docker.com/network/bridge/
 
   - uuid: 570665a5-cb54-4b5e-baa8-8181e2ab2a47
     question: What is the benefit of creating a user-defined bridge network instead of using the default bridge?
     answers:
-      - { value: "It forces IPv6 mode", correct: false }
-      - { value: "Containers can resolve each other by name", correct: true }
-      - { value: "It automatically sets up TLS for container traffic", correct: false }
-      - { value: "It disables port publishing by default", correct: false }
+      - { value: 'It forces IPv6 mode', correct: false }
+      - { value: 'Containers can resolve each other by name', correct: true }
+      - { value: 'It automatically sets up TLS for container traffic', correct: false }
+      - { value: 'It disables port publishing by default', correct: false }
     help: https://docs.docker.com/network/bridge/
 
   - uuid: 2b060fd9-426e-4208-a97a-917cfc3a419d
     question: What command allows you to list all available Docker networks?
     answers:
-      - { value: "docker info network", correct: false }
-      - { value: "docker network show", correct: false }
-      - { value: "docker network ls", correct: true }
-      - { value: "docker ls network", correct: false }
+      - { value: 'docker info network', correct: false }
+      - { value: 'docker network show', correct: false }
+      - { value: 'docker network ls', correct: true }
+      - { value: 'docker ls network', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/network_ls/
 
   - uuid: a690c420-2a02-44f2-aec5-4624a67b37e6
     question: Which of the following is true about user-defined bridge networks?
     answers:
-      - { value: "They are disabled in rootless mode", correct: false }
-      - { value: "They require manual IP assignment", correct: false }
-      - { value: "They provide automatic DNS-based service discovery between containers", correct: true }
-      - { value: "They only support one container per host", correct: false }
+      - { value: 'They are disabled in rootless mode', correct: false }
+      - { value: 'They require manual IP assignment', correct: false }
+      - { value: 'They provide automatic DNS-based service discovery between containers', correct: true }
+      - { value: 'They only support one container per host', correct: false }
     help: https://docs.docker.com/network/bridge/
 
   - uuid: e67e560c-85df-44d5-8129-cf03aa0f26be
     question: How do you connect a container to a specific bridge network when creating it?
     answers:
-      - { value: "docker run --network dev-net ...", correct: true }
-      - { value: "docker container add dev-net", correct: false }
-      - { value: "docker start --attach-network dev-net ...", correct: false }
-      - { value: "docker network connect --bridge dev-net ...", correct: false }
+      - { value: 'docker run --network dev-net ...', correct: true }
+      - { value: 'docker container add dev-net', correct: false }
+      - { value: 'docker start --attach-network dev-net ...', correct: false }
+      - { value: 'docker network connect --bridge dev-net ...', correct: false }
     help: https://docs.docker.com/network/bridge/
 
   - uuid: c5d62de5-c94b-4cf2-b042-f47c6c417e5c
     question: What happens if two containers are launched on the same user-defined bridge network?
     answers:
-      - { value: "They are bridged to the host interface by default", correct: false }
-      - { value: "They are isolated by default", correct: false }
-      - { value: "They must use published ports to talk to each other", correct: false }
-      - { value: "They can communicate using container names as hostnames", correct: true }
+      - { value: 'They are bridged to the host interface by default', correct: false }
+      - { value: 'They are isolated by default', correct: false }
+      - { value: 'They must use published ports to talk to each other', correct: false }
+      - { value: 'They can communicate using container names as hostnames', correct: true }
     help: https://docs.docker.com/network/bridge/
 
   - uuid: 5f7fdbb2-997a-426e-8440-289f553c24aa
     question: How can you inspect the configuration of a Docker bridge network?
     answers:
-      - { value: "docker inspect network dev-net", correct: false }
-      - { value: "docker bridge show dev-net", correct: false }
-      - { value: "docker network inspect dev-net", correct: true }
-      - { value: "docker network config dev-net", correct: false }
+      - { value: 'docker inspect network dev-net', correct: false }
+      - { value: 'docker bridge show dev-net', correct: false }
+      - { value: 'docker network inspect dev-net', correct: true }
+      - { value: 'docker network config dev-net', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/network_inspect/
 
   - uuid: 1a3586f5-bbe0-4dd6-842b-858ca7d0c28b
     question: Which option allows you to specify a custom subnet when creating a bridge network?
     answers:
-      - { value: "--overlay-subnet", correct: false }
-      - { value: "--range", correct: false }
-      - { value: "--dns", correct: false }
-      - { value: "--subnet", correct: true }
+      - { value: '--overlay-subnet', correct: false }
+      - { value: '--range', correct: false }
+      - { value: '--dns', correct: false }
+      - { value: '--subnet', correct: true }
     help: https://docs.docker.com/engine/reference/commandline/network_create/
 
   - uuid: b1a89930-e29a-4b18-bd5e-94f76875b69b
     question: Can multiple user-defined bridge networks coexist on the same Docker host?
     answers:
-      - { value: "Only with overlay mode enabled", correct: false }
-      - { value: "Yes, and each can have its own IP subnet", correct: true }
-      - { value: "No, only one bridge network is allowed", correct: false }
-      - { value: "Yes, but only in swarm mode", correct: false }
+      - { value: 'Only with overlay mode enabled', correct: false }
+      - { value: 'Yes, and each can have its own IP subnet', correct: true }
+      - { value: 'No, only one bridge network is allowed', correct: false }
+      - { value: 'Yes, but only in swarm mode', correct: false }
     help: https://docs.docker.com/network/bridge/
diff --git a/data/4_Networking/compare_contrats_host_ingress_publishing_modes.yaml b/data/4_Networking/compare_contrats_host_ingress_publishing_modes.yaml
index 8d64af3..b209387 100644
--- a/data/4_Networking/compare_contrats_host_ingress_publishing_modes.yaml
+++ b/data/4_Networking/compare_contrats_host_ingress_publishing_modes.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: bff4381e-95b8-4dc7-9731-8b2a64d76ff7
     question: In Docker Swarm, what is the 'ingress' publishing mode used for?
     answers:
-      - { value: "To expose the service only internally", correct: false }
-      - { value: "To run services in bridge mode", correct: false }
-      - { value: "To bind container ports directly to the host", correct: false }
-      - { value: "To allow any node in the swarm to route traffic to the service", correct: true }
+      - { value: 'To expose the service only internally', correct: false }
+      - { value: 'To run services in bridge mode', correct: false }
+      - { value: 'To bind container ports directly to the host', correct: false }
+      - { value: 'To allow any node in the swarm to route traffic to the service', correct: true }
     help: https://docs.docker.com/network/overlay/#ingress-network
 
   - uuid: a6fd5d85-d040-4bd0-8048-9eb5c8270f1e
     question: What is a key characteristic of 'host' publishing mode in Swarm?
     answers:
-      - { value: "It uses round-robin DNS internally", correct: false }
-      - { value: "It uses ingress routing mesh", correct: false }
-      - { value: "The port is bound only to the node running the task", correct: true }
-      - { value: "Any node can receive and forward traffic to the task", correct: false }
+      - { value: 'It uses round-robin DNS internally', correct: false }
+      - { value: 'It uses ingress routing mesh', correct: false }
+      - { value: 'The port is bound only to the node running the task', correct: true }
+      - { value: 'Any node can receive and forward traffic to the task', correct: false }
     help: https://docs.docker.com/network/host/
 
   - uuid: 99d4b88a-efb0-45c2-9332-90be28ef5194
     question: Which publishing mode is required for using the routing mesh in Swarm?
     answers:
-      - { value: "Host", correct: false }
-      - { value: "Ingress", correct: true }
-      - { value: "Bridge", correct: false }
-      - { value: "Overlay", correct: false }
+      - { value: 'Host', correct: false }
+      - { value: 'Ingress', correct: true }
+      - { value: 'Bridge', correct: false }
+      - { value: 'Overlay', correct: false }
     help: https://docs.docker.com/engine/swarm/ingress/
 
   - uuid: 3a98e2d0-47be-47da-9c1f-9c35aee3f21b
     question: What is a potential downside of using 'host' publishing mode?
     answers:
-      - { value: "There is no support for load balancing", correct: false }
-      - { value: "You can't scale the service", correct: false }
-      - { value: "It prevents access to container logs", correct: false }
-      - { value: "You must manually manage which node receives traffic", correct: true }
+      - { value: 'There is no support for load balancing', correct: false }
+      - { value: 'You can not scale the service', correct: false }
+      - { value: 'It prevents access to container logs', correct: false }
+      - { value: 'You must manually manage which node receives traffic', correct: true }
     help: https://docs.docker.com/engine/swarm/services/#host-publishing-mode
 
   - uuid: e1e64096-37e7-4e1f-8222-bfa410c0d64a
     question: Which publishing mode should you use for direct control over port bindings per node?
     answers:
-      - { value: "Overlay", correct: false }
-      - { value: "Ingress", correct: false }
-      - { value: "Bridge", correct: false }
-      - { value: "Host", correct: true }
+      - { value: 'Overlay', correct: false }
+      - { value: 'Ingress', correct: false }
+      - { value: 'Bridge', correct: false }
+      - { value: 'Host', correct: true }
     help: https://docs.docker.com/engine/swarm/services/#host-publishing-mode
 
   - uuid: d007edcf-c1cd-40dc-b674-ded07f5fa134
     question: How does ingress mode route traffic to services?
     answers:
-      - { value: "Through a routing mesh that forwards requests to tasks on any node", correct: true }
-      - { value: "Using IP tables NAT rules per container", correct: false }
-      - { value: "Directly to a single manager node", correct: false }
-      - { value: "Only on the node where the service was deployed", correct: false }
+      - { value: 'Through a routing mesh that forwards requests to tasks on any node', correct: true }
+      - { value: 'Using IP tables NAT rules per container', correct: false }
+      - { value: 'Directly to a single manager node', correct: false }
+      - { value: 'Only on the node where the service was deployed', correct: false }
     help: https://docs.docker.com/engine/swarm/ingress/
 
   - uuid: b40a8605-2857-471c-bcca-2b87aa72791c
     question: When using ingress mode, what must be enabled on all nodes?
     answers:
-      - { value: "The host network driver", correct: false }
-      - { value: "The internal DNS server", correct: false }
-      - { value: "The logging driver", correct: false }
-      - { value: "The ingress network", correct: true }
+      - { value: 'The host network driver', correct: false }
+      - { value: 'The internal DNS server', correct: false }
+      - { value: 'The logging driver', correct: false }
+      - { value: 'The ingress network', correct: true }
     help: https://docs.docker.com/network/overlay/#ingress-network
 
   - uuid: 1840b31d-e964-406e-910c-4fc90236c37b
     question: In what scenario would you prefer using host mode over ingress?
     answers:
-      - { value: "When deploying global services", correct: false }
-      - { value: "When you need predictable port binding on specific nodes", correct: true }
-      - { value: "When you want to balance traffic across all nodes", correct: false }
-      - { value: "When using bridge network", correct: false }
+      - { value: 'When deploying global services', correct: false }
+      - { value: 'When you need predictable port binding on specific nodes', correct: true }
+      - { value: 'When you want to balance traffic across all nodes', correct: false }
+      - { value: 'When using bridge network', correct: false }
     help: https://docs.docker.com/engine/swarm/services/#host-publishing-mode
 
   - uuid: cfb362ad-6dc3-4bc5-803b-c43a3c5a91c2
     question: Can you use both 'host' and 'ingress' modes for the same service?
     answers:
-      - { value: "No, only one publishing mode can be defined per port", correct: true }
-      - { value: "Yes, they are applied in parallel", correct: false }
-      - { value: "Only if using bridge network", correct: false }
-      - { value: "Yes, with the `--dual-mode` flag", correct: false }
+      - { value: 'No, only one publishing mode can be defined per port', correct: true }
+      - { value: 'Yes, they are applied in parallel', correct: false }
+      - { value: 'Only if using bridge network', correct: false }
+      - { value: 'Yes, with the `--dual-mode` flag', correct: false }
     help: https://docs.docker.com/engine/swarm/services/#host-publishing-mode
 
   - uuid: 1a61e66f-df92-4411-86b0-764f2a4466e5
     question: Which mode is **more suitable** for internal load balancing across replicas?
     answers:
-      - { value: "Host", correct: false }
-      - { value: "Macvlan", correct: false }
-      - { value: "Bridge", correct: false }
-      - { value: "Ingress", correct: true }
+      - { value: 'Host', correct: false }
+      - { value: 'Macvlan', correct: false }
+      - { value: 'Bridge', correct: false }
+      - { value: 'Ingress', correct: true }
     help: https://docs.docker.com/engine/swarm/ingress/
diff --git a/data/4_Networking/configure_external_dns.yaml b/data/4_Networking/configure_external_dns.yaml
index e768bbf..2831287 100644
--- a/data/4_Networking/configure_external_dns.yaml
+++ b/data/4_Networking/configure_external_dns.yaml
@@ -2,71 +2,71 @@ questions:
   - uuid: f2415a8f-98ff-4bde-b048-3b3e6c23dacf
     question: Which Docker CLI option allows you to set an external DNS server for a container at runtime?
     answers:
-      - { value: "--add-host", correct: false }
-      - { value: "--resolve", correct: false }
-      - { value: "--hostname", correct: false }
-      - { value: "--dns", correct: true }
+      - { value: '--add-host', correct: false }
+      - { value: '--resolve', correct: false }
+      - { value: '--hostname', correct: false }
+      - { value: '--dns', correct: true }
     help: https://docs.docker.com/config/containers/container-networking/#dns-services
 
   - uuid: 3a69f8ce-d2d1-41d6-b3e3-80403064fdf5
     question: How do you configure Docker to always use a custom DNS server for all containers?
     answers:
-      - { value: "Use docker network create with --dns-global", correct: false }
-      - { value: "Add `dns`: ['8.8.8.8'] to /etc/docker/daemon.json and restart the daemon", correct: true }
-      - { value: "Add --dns to all docker ps commands", correct: false }
-      - { value: "Modify /etc/resolv.conf inside containers", correct: false }
+      - { value: 'Use docker network create with --dns-global', correct: false }
+      - { value: 'Add `dns`: [8.8.8.8] to /etc/docker/daemon.json and restart the daemon', correct: true }
+      - { value: 'Add --dns to all docker ps commands', correct: false }
+      - { value: 'Modify /etc/resolv.conf inside containers', correct: false }
     help: https://docs.docker.com/config/daemon/#dns-servers
 
   - uuid: 7cb52d35-1f95-4a76-91d2-9cd3b13bdbbd
     question: Where should you define a global DNS server for Docker in a Linux environment?
     answers:
-      - { value: "~/.docker/config.json", correct: false }
-      - { value: "/etc/docker/daemon.json", correct: true }
-      - { value: "/etc/network/interfaces", correct: false }
-      - { value: "/etc/resolv.conf", correct: false }
+      - { value: '~/.docker/config.json', correct: false }
+      - { value: '/etc/docker/daemon.json', correct: true }
+      - { value: '/etc/network/interfaces', correct: false }
+      - { value: '/etc/resolv.conf', correct: false }
     help: https://docs.docker.com/config/daemon/
 
   - uuid: 9a0d050d-3821-4620-b19a-f2d2733f9cc1
     question: After modifying the Docker daemon configuration file to set DNS, what must you do for it to take effect?
     answers:
-      - { value: "Clear the Docker image cache", correct: false }
-      - { value: "Run docker system prune", correct: false }
-      - { value: "Restart the Docker service", correct: true }
-      - { value: "Restart each container manually", correct: false }
+      - { value: 'Clear the Docker image cache', correct: false }
+      - { value: 'Run docker system prune', correct: false }
+      - { value: 'Restart the Docker service', correct: true }
+      - { value: 'Restart each container manually', correct: false }
     help: https://docs.docker.com/config/daemon/
 
   - uuid: 1353ae30-9f02-4465-9286-f28cfb5f86fc
     question: Which of the following `docker run` commands sets a container to use Google's public DNS server?
     answers:
-      - { value: "docker run --set-dns 8.8.8.8 alpine", correct: false }
-      - { value: "docker run --resolve 8.8.8.8 alpine", correct: false }
-      - { value: "docker run --dns-server 8.8.8.8 alpine", correct: false }
-      - { value: "docker run --dns 8.8.8.8 alpine nslookup google.com", correct: true }
+      - { value: 'docker run --set-dns 8.8.8.8 alpine', correct: false }
+      - { value: 'docker run --resolve 8.8.8.8 alpine', correct: false }
+      - { value: 'docker run --dns-server 8.8.8.8 alpine', correct: false }
+      - { value: 'docker run --dns 8.8.8.8 alpine nslookup google.com', correct: true }
     help: https://docs.docker.com/config/containers/container-networking/#dns-services
 
   - uuid: d48d2f87-96e9-46b4-a7ff-b65799f6a9c1
     question: If no custom DNS is specified for a container, where does Docker get its DNS configuration from by default?
     answers:
-      - { value: "/etc/resolv.conf of the host", correct: true }
-      - { value: "UCP controller DNS settings", correct: false }
-      - { value: "/var/lib/docker/dns.conf", correct: false }
-      - { value: "Docker Hub settings", correct: false }
+      - { value: '/etc/resolv.conf of the host', correct: true }
+      - { value: 'UCP controller DNS settings', correct: false }
+      - { value: '/var/lib/docker/dns.conf', correct: false }
+      - { value: 'Docker Hub settings', correct: false }
     help: https://docs.docker.com/config/containers/container-networking/#dns-services
 
   - uuid: 5460551f-6d1a-4cc5-bdd2-4f1e3e60cb7d
     question: Can you use multiple DNS servers in a single `--dns` declaration?
     answers:
-      - { value: "Only when using docker-compose", correct: false }
-      - { value: "Only if using host network mode", correct: false }
-      - { value: "Yes, comma-separated", correct: false }
-      - { value: "No, you must repeat --dns for each server", correct: true }
+      - { value: 'Only when using docker-compose', correct: false }
+      - { value: 'Only if using host network mode', correct: false }
+      - { value: 'Yes, comma-separated', correct: false }
+      - { value: 'No, you must repeat --dns for each server', correct: true }
     help: https://docs.docker.com/config/containers/container-networking/#dns-services
 
   - uuid: 002f186e-1cfc-4b76-9e70-8998eec19fc1
     question: Which tool can you use inside a container to test DNS resolution?
     answers:
-      - { value: "nslookup", correct: true }
-      - { value: "dnscheck", correct: false }
-      - { value: "docker network test", correct: false }
-      - { value: "ping -dns", correct: false }
+      - { value: 'nslookup', correct: true }
+      - { value: 'dnscheck', correct: false }
+      - { value: 'docker network test', correct: false }
+      - { value: 'ping -dns', correct: false }
     help: https://docs.docker.com/config/containers/container-networking/#dns-services
diff --git a/data/4_Networking/container_network_model.yaml b/data/4_Networking/container_network_model.yaml
index 74d4fae..78b6dad 100644
--- a/data/4_Networking/container_network_model.yaml
+++ b/data/4_Networking/container_network_model.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: 67b7c64e-89b1-4037-8123-b765be95b72e
     question: What is the purpose of Docker's Container Network Model (CNM)?
     answers:
-      - { value: "To provide a standardized framework for network driver plugins to interact with the Docker engine", correct: true }
-      - { value: "To configure the swarm routing mesh", correct: false }
-      - { value: "To define how containers share persistent storage volumes", correct: false }
-      - { value: "To manage container restart policies", correct: false }
+      - { value: 'To provide a standardized framework for network driver plugins to interact with the Docker engine', correct: true }
+      - { value: 'To configure the swarm routing mesh', correct: false }
+      - { value: 'To define how containers share persistent storage volumes', correct: false }
+      - { value: 'To manage container restart policies', correct: false }
     help: https://docs.docker.com/network/
 
   - uuid: 1cfb3917-2df8-442e-a066-65115a1d1e4a
     question: In the CNM, what are the core components involved in container networking?
     answers:
-      - { value: "Bridge, VLAN, Overlay, Host", correct: false }
-      - { value: "Sandbox, Endpoint, Network, Driver", correct: true }
-      - { value: "Veth pair, iptables, DNS, firewall", correct: false }
-      - { value: "Container, Image, Volume, IPAM", correct: false }
+      - { value: 'Bridge, VLAN, Overlay, Host', correct: false }
+      - { value: 'Sandbox, Endpoint, Network, Driver', correct: true }
+      - { value: 'Veth pair, iptables, DNS, firewall', correct: false }
+      - { value: 'Container, Image, Volume, IPAM', correct: false }
     help: https://docs.docker.com/engine/network/
 
   - uuid: d7bdb270-7399-4373-b0e4-e0a1f7a155f9
     question: What is a sandbox in the Docker Container Network Model?
     answers:
-      - { value: "A test container used for staging deployments", correct: false }
-      - { value: "A layer in an image used for caching purposes", correct: false }
-      - { value: "An isolated network stack (interfaces, routes, etc.) attached to a container", correct: true }
-      - { value: "A Docker build environment used for image creation", correct: false }
+      - { value: 'A test container used for staging deployments', correct: false }
+      - { value: 'A layer in an image used for caching purposes', correct: false }
+      - { value: 'An isolated network stack (interfaces, routes, etc.) attached to a container', correct: true }
+      - { value: 'A Docker build environment used for image creation', correct: false }
     help: https://docs.docker.com/engine/network/
 
   - uuid: f050a9a7-95e6-4b7d-bda4-1d7a29437679
     question: Which CNM component connects a container's sandbox to a Docker network?
     answers:
-      - { value: "Overlay", correct: false }
-      - { value: "IPAM", correct: false }
-      - { value: "Endpoint", correct: true }
-      - { value: "Bridge", correct: false }
+      - { value: 'Overlay', correct: false }
+      - { value: 'IPAM', correct: false }
+      - { value: 'Endpoint', correct: true }
+      - { value: 'Bridge', correct: false }
     help: https://docs.docker.com/engine/network/
 
   - uuid: 9488080c-4b58-4a60-b94a-74db42b5f44a
     question: What is the role of an IPAM driver in Docker networking?
     answers:
-      - { value: "To authenticate access to a network", correct: false }
-      - { value: "To assign IP addresses and manage IP pools for networks", correct: true }
-      - { value: "To configure DNS resolution for containers", correct: false }
-      - { value: "To limit bandwidth between containers", correct: false }
+      - { value: 'To authenticate access to a network', correct: false }
+      - { value: 'To assign IP addresses and manage IP pools for networks', correct: true }
+      - { value: 'To configure DNS resolution for containers', correct: false }
+      - { value: 'To limit bandwidth between containers', correct: false }
     help: https://docs.docker.com/reference/compose-file/networks/
 
   - uuid: 4d75b5b0-c8b7-42b6-9b26-76e212e3b982
     question: What is the function of a network driver in the CNM?
     answers:
-      - { value: "Encrypts all container traffic by default", correct: false }
-      - { value: "Manages container logs over the network", correct: false }
-      - { value: "Creates certificates for TLS connections", correct: false }
-      - { value: "Implements the actual network connectivity for containers in a network", correct: true }
+      - { value: 'Encrypts all container traffic by default', correct: false }
+      - { value: 'Manages container logs over the network', correct: false }
+      - { value: 'Creates certificates for TLS connections', correct: false }
+      - { value: 'Implements the actual network connectivity for containers in a network', correct: true }
     help: https://docs.docker.com/engine/network/
 
   - uuid: 3897a472-46ea-4c4b-809a-4a6f04dfd8b0
     question: How does the Docker engine interact with CNM components?
     answers:
-      - { value: "It creates networks directly in the Linux kernel bypassing all abstraction layers", correct: false }
-      - { value: "It embeds all network logic inside the container runtime", correct: false }
-      - { value: "It uses APIs to orchestrate sandbox creation, IPAM calls, and endpoint attachment via the driver", correct: true }
-      - { value: "It uses Dockerfiles to define networks", correct: false }
+      - { value: 'It creates networks directly in the Linux kernel bypassing all abstraction layers', correct: false }
+      - { value: 'It embeds all network logic inside the container runtime', correct: false }
+      - { value: 'It uses APIs to orchestrate sandbox creation, IPAM calls, and endpoint attachment via the driver', correct: true }
+      - { value: 'It uses Dockerfiles to define networks', correct: false }
     help: https://docs.docker.com/engine/network/
 
   - uuid: f8e6a607-8457-4b76-b17d-7117f3f9a6e4
     question: Which component handles IP address assignment when creating a user-defined network?
     answers:
-      - { value: "Dockerfile", correct: false }
-      - { value: "Swarmkit", correct: false }
-      - { value: "IPAM driver", correct: true }
-      - { value: "Overlay driver", correct: false }
+      - { value: 'Dockerfile', correct: false }
+      - { value: 'Swarmkit', correct: false }
+      - { value: 'IPAM driver', correct: true }
+      - { value: 'Overlay driver', correct: false }
     help: https://docs.docker.com/reference/compose-file/networks/
 
   - uuid: b93937b0-85c2-4cb6-9006-5a9a6b3cbac2
     question: Can Docker use external IPAM plugins?
     answers:
-      - { value: "No, only the default IPAM driver is supported", correct: false }
-      - { value: "Only in rootless mode", correct: false }
-      - { value: "Only in Kubernetes mode", correct: false }
-      - { value: "Yes, Docker supports third-party IPAM drivers via the CNM interface", correct: true }
+      - { value: 'No, only the default IPAM driver is supported', correct: false }
+      - { value: 'Only in rootless mode', correct: false }
+      - { value: 'Only in Kubernetes mode', correct: false }
+      - { value: 'Yes, Docker supports third-party IPAM drivers via the CNM interface', correct: true }
     help: https://docs.docker.com/reference/compose-file/networks/
 
   - uuid: 8d77e847-4f3f-4a9e-a6ed-19c998169e62
     question: What does an endpoint represent in Docker networking?
     answers:
-      - { value: "A connection point between a container’s sandbox and a network", correct: true }
-      - { value: "A configuration template for UCP", correct: false }
-      - { value: "A CLI command to inspect container ports", correct: false }
-      - { value: "A DNS alias for a service", correct: false }
+      - { value: 'A connection point between a container’s sandbox and a network', correct: true }
+      - { value: 'A configuration template for UCP', correct: false }
+      - { value: 'A CLI command to inspect container ports', correct: false }
+      - { value: 'A DNS alias for a service', correct: false }
     help: https://docs.docker.com/engine/network/
diff --git a/data/4_Networking/deploy_overlay_service.yaml b/data/4_Networking/deploy_overlay_service.yaml
index e652266..25dff89 100644
--- a/data/4_Networking/deploy_overlay_service.yaml
+++ b/data/4_Networking/deploy_overlay_service.yaml
@@ -2,71 +2,71 @@ questions:
   - uuid: 979fc821-1d0f-4375-bbc3-9dd2f72885a8
     question: What is the main use case of an overlay network in Docker Swarm?
     answers:
-      - { value: "Enabling container-to-container communication across different hosts", correct: true }
-      - { value: "Creating user-defined bridge networks", correct: false }
-      - { value: "Isolating containers from the Docker daemon", correct: false }
-      - { value: "Connecting containers to host services", correct: false }
+      - { value: 'Enabling container-to-container communication across different hosts', correct: true }
+      - { value: 'Creating user-defined bridge networks', correct: false }
+      - { value: 'Isolating containers from the Docker daemon', correct: false }
+      - { value: 'Connecting containers to host services', correct: false }
     help: https://docs.docker.com/network/overlay/
 
   - uuid: 2e7a3bcd-b799-464f-82ce-9470e67852b5
     question: What command creates an overlay network usable by swarm services?
     answers:
-      - { value: "docker swarm network create my-net", correct: false }
-      - { value: "docker network create --driver overlay my-net", correct: true }
-      - { value: "docker network init --swarm my-net", correct: false }
-      - { value: "docker service create --network overlay", correct: false }
+      - { value: 'docker swarm network create my-net', correct: false }
+      - { value: 'docker network create --driver overlay my-net', correct: true }
+      - { value: 'docker network init --swarm my-net', correct: false }
+      - { value: 'docker service create --network overlay', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/network_create/
 
   - uuid: 49d1fdd7-6500-43c1-ae03-b8f6b9b1a9de
     question: Which Docker command deploys a service attached to an overlay network?
     answers:
-      - { value: "docker overlay create nginx", correct: false }
-      - { value: "docker run --network overlay nginx", correct: false }
-      - { value: "docker stack create --bridge nginx", correct: false }
-      - { value: "docker service create --name web --network my-net nginx", correct: true }
+      - { value: 'docker overlay create nginx', correct: false }
+      - { value: 'docker run --network overlay nginx', correct: false }
+      - { value: 'docker stack create --bridge nginx', correct: false }
+      - { value: 'docker service create --name web --network my-net nginx', correct: true }
     help: https://docs.docker.com/engine/reference/commandline/service_create/
 
   - uuid: ecb6d0db-e55b-4a68-90c2-d89d1c906cbd
     question: What requirement must be met before creating an overlay network?
     answers:
-      - { value: "IP forwarding must be manually disabled", correct: false }
-      - { value: "Docker Swarm mode must be initialized", correct: true }
-      - { value: "A local DNS resolver must be active", correct: false }
-      - { value: "Bridge mode must be enabled", correct: false }
+      - { value: 'IP forwarding must be manually disabled', correct: false }
+      - { value: 'Docker Swarm mode must be initialized', correct: true }
+      - { value: 'A local DNS resolver must be active', correct: false }
+      - { value: 'Bridge mode must be enabled', correct: false }
     help: https://docs.docker.com/network/overlay/
 
   - uuid: f0a4d576-4466-491a-93f6-fb0b6f24ef0b
     question: What happens when two services are connected to the same overlay network?
     answers:
-      - { value: "They cannot communicate unless TLS is disabled", correct: false }
-      - { value: "They can communicate by service name across all nodes", correct: true }
-      - { value: "They must be colocated on the same node", correct: false }
-      - { value: "They are isolated unless published ports are used", correct: false }
+      - { value: 'They cannot communicate unless TLS is disabled', correct: false }
+      - { value: 'They can communicate by service name across all nodes', correct: true }
+      - { value: 'They must be colocated on the same node', correct: false }
+      - { value: 'They are isolated unless published ports are used', correct: false }
     help: https://docs.docker.com/network/overlay/
 
   - uuid: 409afde2-d8b2-41dc-b9cd-d63fd3244206
     question: Which network scope is automatically assigned to overlay networks?
     answers:
-      - { value: "global", correct: false }
-      - { value: "host", correct: false }
-      - { value: "swarm", correct: true }
-      - { value: "local", correct: false }
+      - { value: 'global', correct: false }
+      - { value: 'host', correct: false }
+      - { value: 'swarm', correct: true }
+      - { value: 'local', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/network_create/#scope
 
   - uuid: b3797018-1800-460a-8a5b-95d2ebef6a59
     question: How can you verify that a service is connected to an overlay network?
     answers:
-      - { value: "docker service inspect <service> --format '{{ .Spec.TaskTemplate.Networks }}'", correct: true }
-      - { value: "docker service ls --networks", correct: false }
-      - { value: "docker network list <service>", correct: false }
-      - { value: "docker node inspect <network>", correct: false }
+      - { value: 'docker service inspect <service> --format "{{ .Spec.TaskTemplate.Networks }}"', correct: true }
+      - { value: 'docker service ls --networks', correct: false }
+      - { value: 'docker network list <service>', correct: false }
+      - { value: 'docker node inspect <network>', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/service_inspect/
 
   - uuid: 64558b90-cd64-41b8-8c5f-e761a7624ab0
     question: What networking component secures overlay communication in Docker Swarm?
     answers:
-      - { value: "Ingress firewall mode", correct: false }
-      - { value: "Encrypted bridge mode", correct: false }
-      - { value: "IPSec encryption by default", correct: true }
-      - { value: "TLS with NAT traversal", correct: false }
+      - { value: 'Ingress firewall mode', correct: false }
+      - { value: 'Encrypted bridge mode', correct: false }
+      - { value: 'IPSec encryption by default', correct: true }
+      - { value: 'TLS with NAT traversal', correct: false }
     help: https://docs.docker.com/network/overlay/#secure-by-default
diff --git a/data/4_Networking/describe_demonstrate_publish_port_application_accessible_externally.yaml b/data/4_Networking/describe_demonstrate_publish_port_application_accessible_externally.yaml
index 84633b3..953c6f3 100644
--- a/data/4_Networking/describe_demonstrate_publish_port_application_accessible_externally.yaml
+++ b/data/4_Networking/describe_demonstrate_publish_port_application_accessible_externally.yaml
@@ -2,170 +2,170 @@ questions:
   - uuid: e437d86b-19f1-4b36-b23d-cb502e2fdbe7
     question: What is the purpose of the `-p` or `--publish` flag in `docker run`?
     answers:
-      - { value: "To publish logs to the host", correct: false }
-      - { value: "To expose ports to other containers only", correct: false }
-      - { value: "To install required dependencies", correct: false }
-      - { value: "To map a container port to a host port", correct: true }
+      - { value: 'To publish logs to the host', correct: false }
+      - { value: 'To expose ports to other containers only', correct: false }
+      - { value: 'To install required dependencies', correct: false }
+      - { value: 'To map a container port to a host port', correct: true }
     help: https://docs.docker.com/config/containers/container-networking/#published-ports
 
   - uuid: 70ff09b1-3dd4-442a-b1c7-f54c6c1cbcc4
     question: Which command exposes port 80 from a container to port 8080 on the host?
     answers:
-      - { value: "docker run -p 8080:80 nginx", correct: true }
-      - { value: "docker expose 8080:80 nginx", correct: false }
-      - { value: "docker run expose=80 nginx", correct: false }
-      - { value: "docker run -p 80:8080 nginx", correct: false }
+      - { value: 'docker run -p 8080:80 nginx', correct: true }
+      - { value: 'docker expose 8080:80 nginx', correct: false }
+      - { value: 'docker run expose=80 nginx', correct: false }
+      - { value: 'docker run -p 80:8080 nginx', correct: false }
     help: https://docs.docker.com/config/containers/container-networking/#published-ports
 
   - uuid: 50ef01ff-7bb3-49f5-874d-d54b0db8cd95
     question: What happens if you publish the same host port for two containers?
     answers:
-      - { value: "Both containers share the port", correct: false }
-      - { value: "Docker balances the traffic", correct: false }
-      - { value: "Docker creates a virtual network", correct: false }
-      - { value: "The second container will fail to start", correct: true }
+      - { value: 'Both containers share the port', correct: false }
+      - { value: 'Docker balances the traffic', correct: false }
+      - { value: 'Docker creates a virtual network', correct: false }
+      - { value: 'The second container will fail to start', correct: true }
     help: https://docs.docker.com/config/containers/container-networking/#published-ports
 
   - uuid: 1b6c46c8-c8d7-48eb-9b7e-2f8e324efb5a
     question: What is the default behavior if you do not publish any ports with `docker run`?
     answers:
-      - { value: "All ports are automatically published", correct: false }
-      - { value: "The container is only accessible internally", correct: true }
-      - { value: "Ports are assigned dynamically", correct: false }
-      - { value: "The container fails to start", correct: false }
+      - { value: 'All ports are automatically published', correct: false }
+      - { value: 'The container is only accessible internally', correct: true }
+      - { value: 'Ports are assigned dynamically', correct: false }
+      - { value: 'The container fails to start', correct: false }
     help: https://docs.docker.com/config/containers/container-networking/#published-ports
 
   - uuid: 6eafdf52-525c-4b93-9fa0-e5ed2c567a61
     question: How do you restrict a published port to localhost only?
     answers:
-      - { value: "Use IP:hostPort:containerPort format, e.g. `-p 127.0.0.1:8080:80`", correct: true }
-      - { value: "Set `EXPOSE` in the Dockerfile", correct: false }
-      - { value: "Use `--network bridge`", correct: false }
-      - { value: "Use `--internal` flag", correct: false }
+      - { value: 'Use IP:hostPort:containerPort format, e.g. `-p 127.0.0.1:8080:80`', correct: true }
+      - { value: 'Set `EXPOSE` in the Dockerfile', correct: false }
+      - { value: 'Use `--network bridge`', correct: false }
+      - { value: 'Use `--internal` flag', correct: false }
     help: https://docs.docker.com/config/containers/container-networking/#published-ports
 
   - uuid: 2448faed-62e1-4ea2-bdf8-39eb1b252d11
     question: What is the function of the `EXPOSE` instruction in a Dockerfile?
     answers:
-      - { value: "It documents which ports the container will listen on", correct: true }
-      - { value: "It maps the port to the host", correct: false }
-      - { value: "It automatically publishes the port on run", correct: false }
-      - { value: "It restricts access to the port", correct: false }
+      - { value: 'It documents which ports the container will listen on', correct: true }
+      - { value: 'It maps the port to the host', correct: false }
+      - { value: 'It automatically publishes the port on run', correct: false }
+      - { value: 'It restricts access to the port', correct: false }
     help: https://docs.docker.com/engine/reference/builder/#expose
 
   - uuid: 390f8e88-dc9a-4c1e-acc1-c8b4e8770fbd
     question: Can a container with a published port be accessed from outside the host by default?
     answers:
-      - { value: "No, unless `--network host` is used", correct: false }
-      - { value: "Only via Docker Desktop", correct: false }
-      - { value: "Yes, if `-p` is used without IP restriction", correct: true }
-      - { value: "Only with an `EXPOSE` instruction", correct: false }
+      - { value: 'No, unless `--network host` is used', correct: false }
+      - { value: 'Only via Docker Desktop', correct: false }
+      - { value: 'Yes, if `-p` is used without IP restriction', correct: true }
+      - { value: 'Only with an `EXPOSE` instruction', correct: false }
     help: https://docs.docker.com/config/containers/container-networking/#accessing-external-ports
 
   - uuid: 95f83280-e1f5-4f2e-86e7-cac021cce1d9
     question: How do you publish all ports defined with `EXPOSE` in the image?
     answers:
-      - { value: "Use `--all-ports` flag", correct: false }
-      - { value: "Set `EXPOSE_ALL=true` in Dockerfile", correct: false }
-      - { value: "Use `-P` (uppercase)", correct: true }
-      - { value: "Use `-p` without arguments", correct: false }
+      - { value: 'Use `--all-ports` flag', correct: false }
+      - { value: 'Set `EXPOSE_ALL=true` in Dockerfile', correct: false }
+      - { value: 'Use `-P` (uppercase)', correct: true }
+      - { value: 'Use `-p` without arguments', correct: false }
     help: https://docs.docker.com/config/containers/container-networking/#exposing-incoming-ports
 
   - uuid: d11c1453-2d17-41a4-a45a-5ae17c7e9847
     question: What is the effect of publishing a port on a container?
     answers:
-      - { value: "It encrypts container traffic", correct: false }
-      - { value: "It prevents the port from being used", correct: false }
-      - { value: "It binds the port to a host port, allowing external access", correct: true }
-      - { value: "It makes the port internal-only", correct: false }
+      - { value: 'It encrypts container traffic', correct: false }
+      - { value: 'It prevents the port from being used', correct: false }
+      - { value: 'It binds the port to a host port, allowing external access', correct: true }
+      - { value: 'It makes the port internal-only', correct: false }
     help: https://docs.docker.com/config/containers/container-networking/#accessing-external-ports
 
   - uuid: 170920af-1a99-44df-8728-d54fdb41c993
     question: What happens if you omit the host port in `-p :80`?
     answers:
-      - { value: "Docker refuses to start the container", correct: false }
-      - { value: "Docker uses port 80 on the host by default", correct: false }
-      - { value: "Docker assigns a random high-numbered host port", correct: true }
-      - { value: "Docker publishes the port only inside the container", correct: false }
+      - { value: 'Docker refuses to start the container', correct: false }
+      - { value: 'Docker uses port 80 on the host by default', correct: false }
+      - { value: 'Docker assigns a random high-numbered host port', correct: true }
+      - { value: 'Docker publishes the port only inside the container', correct: false }
     help: https://docs.docker.com/config/containers/container-networking/#accessing-external-ports
 
   - uuid: 2e7a8e4f-19f2-442c-9cb2-0667b52ed2d1
     question: How can you inspect which ports are published for a running container?
     answers:
-      - { value: "Use `docker network ls`", correct: false }
-      - { value: "Use `docker port <container>`", correct: true }
-      - { value: "Run `docker inspect` with `--ports`", correct: false }
-      - { value: "Check the `EXPOSE` command", correct: false }
+      - { value: 'Use `docker network ls`', correct: false }
+      - { value: 'Use `docker port <container>`', correct: true }
+      - { value: 'Run `docker inspect` with `--ports`', correct: false }
+      - { value: 'Check the `EXPOSE` command', correct: false }
     help: https://docs.docker.com/reference/cli/docker/container/port/
 
   - uuid: 5b2717e3-82d2-44d5-8f92-cd9bc17b487c
     question: What flag is required to publish a port using Docker Compose?
     answers:
-      - { value: "`expose` key at root", correct: false }
-      - { value: "`publish` under `networks:`", correct: false }
-      - { value: "`ports` key under the service definition", correct: true }
-      - { value: "`-p` in the `command:`", correct: false }
+      - { value: '`expose` key at root', correct: false }
+      - { value: '`publish` under `networks:`', correct: false }
+      - { value: '`ports` key under the service definition', correct: true }
+      - { value: '`-p` in the `command:`', correct: false }
     help: https://docs.docker.com/compose/compose-file/compose-file-v3/#ports
 
   - uuid: 7994dfeb-ecf2-40a3-96b9-9b0e4fbbd9d3
     question: In Docker Compose, how do you restrict a published port to localhost?
     answers:
-      - { value: "Use `'127.0.0.1:8080:80'` as the port mapping", correct: true }
-      - { value: "Use `host: 127.0.0.1` under network", correct: false }
-      - { value: "Add `internal: true`", correct: false }
-      - { value: "Use `bind: localhost`", correct: false }
+      - { value: 'Use `127.0.0.1:8080:80` as the port mapping', correct: true }
+      - { value: 'Use `host: 127.0.0.1` under network', correct: false }
+      - { value: 'Add `internal: true`', correct: false }
+      - { value: 'Use `bind: localhost`', correct: false }
     help: https://docs.docker.com/compose/compose-file/compose-file-v3/#ports
 
   - uuid: 7c252d25-b89d-4d80-bfc6-62b4f3955f9c
     question: Can the same container port be published to multiple host ports?
     answers:
-      - { value: "Yes, by running multiple containers using the same image", correct: true }
-      - { value: "Only in Swarm mode", correct: false }
-      - { value: "Only with `--network host`", correct: false }
-      - { value: "No, Docker blocks duplicate mappings", correct: false }
+      - { value: 'Yes, by running multiple containers using the same image', correct: true }
+      - { value: 'Only in Swarm mode', correct: false }
+      - { value: 'Only with `--network host`', correct: false }
+      - { value: 'No, Docker blocks duplicate mappings', correct: false }
     help: https://docs.docker.com/config/containers/container-networking/#published-ports
 
   - uuid: 5c6a89de-df23-4ff3-a5b1-836be317fbea
     question: Why should you avoid publishing unnecessary ports in production?
     answers:
-      - { value: "Docker doesn’t support it", correct: false }
-      - { value: "To reduce the attack surface", correct: true }
-      - { value: "It blocks log collection", correct: false }
-      - { value: "It increases container memory usage", correct: false }
+      - { value: 'Docker doesn’t support it', correct: false }
+      - { value: 'To reduce the attack surface', correct: true }
+      - { value: 'It blocks log collection', correct: false }
+      - { value: 'It increases container memory usage', correct: false }
     help: https://docs.docker.com/config/containers/container-networking/#security-considerations
 
   - uuid: 0a602e7d-5fa0-4a82-9824-c5cd1b60447f
     question: What is the effect of `--network host` on port publishing?
     answers:
-      - { value: "Port mapping is handled by Swarm", correct: false }
-      - { value: "Ports must still be published manually", correct: false }
-      - { value: "The container shares the host’s network stack", correct: true }
-      - { value: "The container gets a new IP address", correct: false }
+      - { value: 'Port mapping is handled by Swarm', correct: false }
+      - { value: 'Ports must still be published manually', correct: false }
+      - { value: 'The container shares the host’s network stack', correct: true }
+      - { value: 'The container gets a new IP address', correct: false }
     help: https://docs.docker.com/network/host/
 
   - uuid: b16eaec2-6072-4661-97c6-f4bc3e8aa3c3
     question: Which flag ensures Docker binds a port on both IPv4 and IPv6?
     answers:
-      - { value: "Use `[::]:8080:80` as the bind address", correct: true }
-      - { value: "`--ip6`", correct: false }
-      - { value: "`--dual-stack`", correct: false }
-      - { value: "`--multi-ip`", correct: false }
+      - { value: 'Use `[::]:8080:80` as the bind address', correct: true }
+      - { value: '`--ip6`', correct: false }
+      - { value: '`--dual-stack`', correct: false }
+      - { value: '`--multi-ip`', correct: false }
     help: https://docs.docker.com/config/containers/container-networking/#ipv6-and-published-ports
 
   - uuid: 9493f53f-1a53-48df-a4cb-dc2c55a438fc
     question: What does the `--expose` flag do when running a container?
     answers:
-      - { value: "It maps the port to 0.0.0.0", correct: false }
-      - { value: "It makes the port available externally", correct: false }
-      - { value: "It opens the port in the firewall", correct: false }
-      - { value: "It documents the port but doesn’t publish it", correct: true }
+      - { value: 'It maps the port to 0.0.0.0', correct: false }
+      - { value: 'It makes the port available externally', correct: false }
+      - { value: 'It opens the port in the firewall', correct: false }
+      - { value: 'It documents the port but doesn’t publish it', correct: true }
     help: https://docs.docker.com/config/containers/container-networking/#exposing-incoming-ports
 
   - uuid: ef967cdc-7b6f-4b8a-a152-158720d9cd89
     question: What tool can you use to see which container is listening on a specific host port?
     answers:
-      - { value: "`docker attach`", correct: false }
-      - { value: "`docker ps` or `docker port`", correct: true }
-      - { value: "`docker compose config`", correct: false }
-      - { value: "`docker logs`", correct: false }
+      - { value: '`docker attach`', correct: false }
+      - { value: '`docker ps` or `docker port`', correct: true }
+      - { value: '`docker compose config`', correct: false }
+      - { value: '`docker logs`', correct: false }
     help: https://docs.docker.com/reference/cli/docker/container/port/
diff --git a/data/4_Networking/describe_different_types_use_cases_built_in_network_drivers.yaml b/data/4_Networking/describe_different_types_use_cases_built_in_network_drivers.yaml
index abaa97b..d8938b8 100644
--- a/data/4_Networking/describe_different_types_use_cases_built_in_network_drivers.yaml
+++ b/data/4_Networking/describe_different_types_use_cases_built_in_network_drivers.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: e2f6b6c1-6832-4ff5-9b68-902db4fcd05d
     question: What is the primary purpose of the bridge network driver?
     answers:
-      - { value: "To allow container-to-container communication on a single host", correct: true }
-      - { value: "To expose services to the internet", correct: false }
-      - { value: "To isolate containers from the host network", correct: false }
-      - { value: "To span containers across multiple Docker hosts", correct: false }
+      - { value: 'To allow container-to-container communication on a single host', correct: true }
+      - { value: 'To expose services to the internet', correct: false }
+      - { value: 'To isolate containers from the host network', correct: false }
+      - { value: 'To span containers across multiple Docker hosts', correct: false }
     help: 'https://docs.docker.com/engine/network/drivers/bridge/'
 
   - uuid: 48aee02c-d576-4c3e-b54c-eed847f61f70
     question: Which built-in Docker network driver should you use to enable communication between services across nodes in a Swarm cluster?
     answers:
-      - { value: "overlay", correct: true }
-      - { value: "host", correct: false }
-      - { value: "macvlan", correct: false }
-      - { value: "bridge", correct: false }
+      - { value: 'overlay', correct: true }
+      - { value: 'host', correct: false }
+      - { value: 'macvlan', correct: false }
+      - { value: 'bridge', correct: false }
     help: 'https://docs.docker.com/engine/network/drivers/overlay/'
 
   - uuid: 3a6bce4a-8e9f-4c53-bc99-2bde9b37961c
     question: What is the host network driver used for?
     answers:
-      - { value: "To assign static IPs to containers", correct: false }
-      - { value: "To encrypt traffic between services", correct: false }
-      - { value: "To run containers with direct access to the host’s network stack", correct: true }
-      - { value: "To isolate containers from each other", correct: false }
+      - { value: 'To assign static IPs to containers', correct: false }
+      - { value: 'To encrypt traffic between services', correct: false }
+      - { value: 'To run containers with direct access to the host’s network stack', correct: true }
+      - { value: 'To isolate containers from each other', correct: false }
     help: 'https://docs.docker.com/engine/network/drivers/host/'
 
   - uuid: d0d0c3db-98c0-4725-8b68-160b15574b7a
     question: Which network driver should you use to assign a MAC address to a container from your LAN?
     answers:
-      - { value: "overlay", correct: false }
-      - { value: "macvlan", correct: true }
-      - { value: "bridge", correct: false }
-      - { value: "host", correct: false }
+      - { value: 'overlay', correct: false }
+      - { value: 'macvlan', correct: true }
+      - { value: 'bridge', correct: false }
+      - { value: 'host', correct: false }
     help: 'https://docs.docker.com/engine/network/drivers/macvlan/'
 
   - uuid: 07f01327-ea86-4635-8424-0c3ebc92e6d4
     question: What is the purpose of the none network driver?
     answers:
-      - { value: "To run containers with host DNS", correct: false }
-      - { value: "To enable encrypted traffic between containers", correct: false }
-      - { value: "To allow containers to auto-discover each other", correct: false }
-      - { value: "To disable all networking for the container", correct: true }
+      - { value: 'To run containers with host DNS', correct: false }
+      - { value: 'To enable encrypted traffic between containers', correct: false }
+      - { value: 'To allow containers to auto-discover each other', correct: false }
+      - { value: 'To disable all networking for the container', correct: true }
     help: 'https://docs.docker.com/engine/network/tutorials/standalone/#use-the-none-network'
 
   - uuid: f2c1690e-78d5-43e4-82cb-10d5e042189b
     question: What happens when a container is connected to the host network driver?
     answers:
-      - { value: "The container shares the host’s network namespace", correct: true }
-      - { value: "The container gets a new network namespace", correct: false }
-      - { value: "The container is isolated from the internet", correct: false }
-      - { value: "The container is assigned a MAC address", correct: false }
+      - { value: 'The container shares the host’s network namespace', correct: true }
+      - { value: 'The container gets a new network namespace', correct: false }
+      - { value: 'The container is isolated from the internet', correct: false }
+      - { value: 'The container is assigned a MAC address', correct: false }
     help: 'https://docs.docker.com/engine/network/drivers/host/'
 
   - uuid: 2ab48a46-30f7-4552-9180-39fa8a57c03e
     question: In which scenario would using the macvlan driver be appropriate?
     answers:
-      - { value: "When running many containers with NAT", correct: false }
-      - { value: "When containers need to appear as physical devices on the network", correct: true }
-      - { value: "When containers only need outbound internet access", correct: false }
-      - { value: "When containers should not access the network", correct: false }
+      - { value: 'When running many containers with NAT', correct: false }
+      - { value: 'When containers need to appear as physical devices on the network', correct: true }
+      - { value: 'When containers only need outbound internet access', correct: false }
+      - { value: 'When containers should not access the network', correct: false }
     help: 'https://docs.docker.com/engine/network/drivers/macvlan/'
 
   - uuid: 85e3f083-302e-4d9e-86cb-9c8b1ff08e7d
     question: Which network driver does Docker use by default if none is specified?
     answers:
-      - { value: "overlay", correct: false }
-      - { value: "bridge", correct: true }
-      - { value: "host", correct: false }
-      - { value: "macvlan", correct: false }
+      - { value: 'overlay', correct: false }
+      - { value: 'bridge', correct: true }
+      - { value: 'host', correct: false }
+      - { value: 'macvlan', correct: false }
     help: 'https://docs.docker.com/engine/network/drivers/bridge/'
 
   - uuid: 2b3439e4-5674-4e85-bcf5-cf4ac86b2b31
     question: Which network driver supports service discovery and encryption in Docker Swarm?
     answers:
-      - { value: "host", correct: false }
-      - { value: "bridge", correct: false }
-      - { value: "macvlan", correct: false }
-      - { value: "overlay", correct: true }
+      - { value: 'host', correct: false }
+      - { value: 'bridge', correct: false }
+      - { value: 'macvlan', correct: false }
+      - { value: 'overlay', correct: true }
     help: 'https://docs.docker.com/engine/network/drivers/overlay/'
 
   - uuid: 82beef4a-3a80-4303-8985-6ce0df5ad2c4
     question: Which Docker network driver is best suited for isolating containers from the network entirely?
     answers:
-      - { value: "host", correct: false }
-      - { value: "bridge", correct: false }
-      - { value: "none", correct: true }
-      - { value: "overlay", correct: false }
+      - { value: 'host', correct: false }
+      - { value: 'bridge', correct: false }
+      - { value: 'none', correct: true }
+      - { value: 'overlay', correct: false }
     help: 'https://docs.docker.com/engine/network/tutorials/standalone/#use-the-none-network'
diff --git a/data/4_Networking/describe_engine_registry_ucp_traffic.yaml b/data/4_Networking/describe_engine_registry_ucp_traffic.yaml
index b800d7c..4a47b7d 100644
--- a/data/4_Networking/describe_engine_registry_ucp_traffic.yaml
+++ b/data/4_Networking/describe_engine_registry_ucp_traffic.yaml
@@ -2,44 +2,44 @@ questions:
   - uuid: 46cf7d2c-0a61-42ef-940d-38f91a34c85e
     question: What protocol is used by the Docker engine to push images to a registry?
     answers:
-      - { value: "gRPC over UDP", correct: false }
-      - { value: "SSH over TCP port 22", correct: false }
-      - { value: "HTTPS with RESTful API calls", correct: true }
-      - { value: "SCP with base64 encoding", correct: false }
+      - { value: 'gRPC over UDP', correct: false }
+      - { value: 'SSH over TCP port 22', correct: false }
+      - { value: 'HTTPS with RESTful API calls', correct: true }
+      - { value: 'SCP with base64 encoding', correct: false }
     help: https://docs.docker.com/registry/spec/api/
 
   - uuid: d593dd0b-20d6-4c81-a4b4-63d234b99bce
     question: Which port is typically used for secure traffic between UCP controllers and Docker engines?
     answers:
-      - { value: "5000", correct: false }
-      - { value: "443", correct: true }
-      - { value: "22", correct: false }
-      - { value: "2375", correct: false }
+      - { value: '5000', correct: false }
+      - { value: '443', correct: true }
+      - { value: '22', correct: false }
+      - { value: '2375', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/architecture/ucp-architecture.html
 
   - uuid: b2ea7eaf-813b-4e7f-a9ec-7819ff0f9695
     question: What kind of internal communication occurs between UCP manager nodes?
     answers:
-      - { value: "Raft protocol for consensus", correct: true }
-      - { value: "SSH command relays", correct: false }
-      - { value: "ICMP for liveness", correct: false }
-      - { value: "Syslog over UDP", correct: false }
+      - { value: 'Raft protocol for consensus', correct: true }
+      - { value: 'SSH command relays', correct: false }
+      - { value: 'ICMP for liveness', correct: false }
+      - { value: 'Syslog over UDP', correct: false }
     help: https://docs.docker.com/engine/swarm/raft/
 
   - uuid: 1cbf7d01-1bcd-49a4-a372-60bb524a1aa7
     question: Which service uses mutual TLS to authenticate communications with UCP?
     answers:
-      - { value: "Docker CLI only", correct: false }
-      - { value: "Docker engine", correct: true }
-      - { value: "External load balancer", correct: false }
-      - { value: "DTR only", correct: false }
+      - { value: 'Docker CLI only', correct: false }
+      - { value: 'Docker engine', correct: true }
+      - { value: 'External load balancer', correct: false }
+      - { value: 'DTR only', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/architecture/ucp-architecture.html
 
   - uuid: 061dcd8d-255a-4cf3-8cf3-d663c34e5897
     question: How does UCP handle secure communications to its API?
     answers:
-      - { value: "By requiring clients to SSH tunnel into manager nodes", correct: false }
-      - { value: "By exposing a TLS-enabled HTTPS API on port 443", correct: true }
-      - { value: "Via kube-apiserver passthrough", correct: false }
-      - { value: "Through an Ingress controller for TCP forwarding", correct: false }
+      - { value: 'By requiring clients to SSH tunnel into manager nodes', correct: false }
+      - { value: 'By exposing a TLS-enabled HTTPS API on port 443', correct: true }
+      - { value: 'Via kube-apiserver passthrough', correct: false }
+      - { value: 'Through an Ingress controller for TCP forwarding', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/admin/configure-ucp.html
diff --git a/data/4_Networking/describe_kubernetes_container_network_model.yaml b/data/4_Networking/describe_kubernetes_container_network_model.yaml
index ad5a71a..ab16d3f 100644
--- a/data/4_Networking/describe_kubernetes_container_network_model.yaml
+++ b/data/4_Networking/describe_kubernetes_container_network_model.yaml
@@ -2,116 +2,116 @@ questions:
   - uuid: 14596cd3-0c20-47aa-bd2a-bba765352315
     question: What is a core principle of the Kubernetes Container Network Interface (CNI) model?
     answers:
-      - { value: "All Pods can communicate with all other Pods without NAT", correct: true }
-      - { value: "Each Pod must manually configure NAT", correct: false }
-      - { value: "Pods can only communicate within the same namespace", correct: false }
-      - { value: "Each Pod has multiple IPs by default", correct: false }
+      - { value: 'All Pods can communicate with all other Pods without NAT', correct: true }
+      - { value: 'Each Pod must manually configure NAT', correct: false }
+      - { value: 'Pods can only communicate within the same namespace', correct: false }
+      - { value: 'Each Pod has multiple IPs by default', correct: false }
     help: https://kubernetes.io/docs/concepts/cluster-administration/networking/
 
   - uuid: 68952c0c-bb62-4e59-9911-c9dc3b7e3e1e
     question: In Kubernetes, what does each Pod receive in terms of networking?
     answers:
-      - { value: "An IP tied to its namespace", correct: false }
-      - { value: "A unique IP address", correct: true }
-      - { value: "No IP address until a service is created", correct: false }
-      - { value: "A shared IP with the node", correct: false }
+      - { value: 'An IP tied to its namespace', correct: false }
+      - { value: 'A unique IP address', correct: true }
+      - { value: 'No IP address until a service is created', correct: false }
+      - { value: 'A shared IP with the node', correct: false }
     help: https://kubernetes.io/docs/concepts/cluster-administration/networking/
 
   - uuid: 97bdb862-c891-44c7-8889-e0e22e50754f
     question: What is the purpose of a CNI plugin in Kubernetes?
     answers:
-      - { value: "To load balance external traffic", correct: false }
-      - { value: "To manage ingress controllers", correct: false }
-      - { value: "To create DNS entries for services", correct: false }
-      - { value: "To configure network interfaces for Pods", correct: true }
+      - { value: 'To load balance external traffic', correct: false }
+      - { value: 'To manage ingress controllers', correct: false }
+      - { value: 'To create DNS entries for services', correct: false }
+      - { value: 'To configure network interfaces for Pods', correct: true }
     help: https://kubernetes.io/docs/concepts/extend-kubernetes/compute-storage-net/network-plugins/
 
   - uuid: e6523cb3-e99b-4cd8-88d2-bd8be25c4c4b
     question: What is the key function of kube-proxy in the Kubernetes networking model?
     answers:
-      - { value: "Assigns IPs to Pods", correct: false }
-      - { value: "Acts as a DHCP server for containers", correct: false }
-      - { value: "Maintains network rules on nodes to allow service access", correct: true }
-      - { value: "Routes DNS queries to external resolvers", correct: false }
+      - { value: 'Assigns IPs to Pods', correct: false }
+      - { value: 'Acts as a DHCP server for containers', correct: false }
+      - { value: 'Maintains network rules on nodes to allow service access', correct: true }
+      - { value: 'Routes DNS queries to external resolvers', correct: false }
     help: https://kubernetes.io/docs/concepts/services-networking/service/#virtual-ips-and-service-proxies
 
   - uuid: 963a0ad1-8991-4d19-b087-23b84fd13712
     question: Which networking assumption is required by Kubernetes for inter-Pod communication?
     answers:
-      - { value: "No NAT between Pods", correct: true }
-      - { value: "Pods communicate only via services", correct: false }
-      - { value: "DNS must be configured manually", correct: false }
-      - { value: "Pods must use host networking", correct: false }
+      - { value: 'No NAT between Pods', correct: true }
+      - { value: 'Pods communicate only via services', correct: false }
+      - { value: 'DNS must be configured manually', correct: false }
+      - { value: 'Pods must use host networking', correct: false }
     help: https://kubernetes.io/docs/concepts/cluster-administration/networking/#requirements
 
   - uuid: 03ef515e-812a-4b84-8b68-8c9ac67a05e7
     question: What networking model does Kubernetes enforce for communication?
     answers:
-      - { value: "Container-to-node NAT model", correct: false }
-      - { value: "Hierarchical network model with segmented routing", correct: false }
-      - { value: "IP-over-IP overlay model", correct: false }
-      - { value: "Flat network model where Pods have full routability", correct: true }
+      - { value: 'Container-to-node NAT model', correct: false }
+      - { value: 'Hierarchical network model with segmented routing', correct: false }
+      - { value: 'IP-over-IP overlay model', correct: false }
+      - { value: 'Flat network model where Pods have full routability', correct: true }
     help: https://kubernetes.io/docs/concepts/cluster-administration/networking/#kubernetes-model
 
   - uuid: e2c9645a-09c0-4aa4-8e4c-76179f7a42a4
     question: What is the role of a Kubernetes Service in the network model?
     answers:
-      - { value: "It assigns IPs to Pods", correct: false }
-      - { value: "It manages ingress controllers", correct: false }
-      - { value: "It provides stable network endpoints for accessing Pods", correct: true }
-      - { value: "It replaces kube-dns", correct: false }
+      - { value: 'It assigns IPs to Pods', correct: false }
+      - { value: 'It manages ingress controllers', correct: false }
+      - { value: 'It provides stable network endpoints for accessing Pods', correct: true }
+      - { value: 'It replaces kube-dns', correct: false }
     help: https://kubernetes.io/docs/concepts/services-networking/service/
 
   - uuid: 2aa6ff98-f105-44df-9a63-4e6df3c734cf
     question: How does Kubernetes ensure service discovery in the cluster?
     answers:
-      - { value: "By using static host files", correct: false }
-      - { value: "By requiring manual IP configuration in Pods", correct: false }
-      - { value: "By using DNS records created by kube-dns/CoreDNS", correct: true }
-      - { value: "By injecting IPs into environment variables only", correct: false }
+      - { value: 'By using static host files', correct: false }
+      - { value: 'By requiring manual IP configuration in Pods', correct: false }
+      - { value: 'By using DNS records created by kube-dns/CoreDNS', correct: true }
+      - { value: 'By injecting IPs into environment variables only', correct: false }
     help: https://kubernetes.io/docs/concepts/services-networking/dns-pod-service/
 
   - uuid: 1782764a-2fcf-4643-a1d8-2434b45c7cf7
     question: What is the difference between ClusterIP, NodePort, and LoadBalancer in Kubernetes?
     answers:
-      - { value: "They configure ingress network policies", correct: false }
-      - { value: "They control which namespace a Service belongs to", correct: false }
-      - { value: "They define how a Service is exposed inside or outside the cluster", correct: true }
-      - { value: "They assign IP addresses to nodes", correct: false }
+      - { value: 'They configure ingress network policies', correct: false }
+      - { value: 'They control which namespace a Service belongs to', correct: false }
+      - { value: 'They define how a Service is exposed inside or outside the cluster', correct: true }
+      - { value: 'They assign IP addresses to nodes', correct: false }
     help: https://kubernetes.io/docs/concepts/services-networking/service/#publishing-services-service-types
 
   - uuid: 2754d9f5-b82e-4f7d-9a7a-1e2f3b07e3ac
     question: Which Service type should you use to expose an application externally without an external load balancer?
     answers:
-      - { value: "ClusterIP", correct: false }
-      - { value: "ExternalName", correct: false }
-      - { value: "NodePort", correct: true }
-      - { value: "Headless", correct: false }
+      - { value: 'ClusterIP', correct: false }
+      - { value: 'ExternalName', correct: false }
+      - { value: 'NodePort', correct: true }
+      - { value: 'Headless', correct: false }
     help: https://kubernetes.io/docs/concepts/services-networking/service/#nodeport
 
   - uuid: e0db5b13-d0d2-4041-bb12-e631a4265a47
     question: What is a headless service in Kubernetes?
     answers:
-      - { value: "A service that has no DNS entry", correct: false }
-      - { value: "A service without a cluster IP, used for direct Pod-to-Pod communication", correct: true }
-      - { value: "A service without labels", correct: false }
-      - { value: "A deprecated type of service", correct: false }
+      - { value: 'A service that has no DNS entry', correct: false }
+      - { value: 'A service without a cluster IP, used for direct Pod-to-Pod communication', correct: true }
+      - { value: 'A service without labels', correct: false }
+      - { value: 'A deprecated type of service', correct: false }
     help: https://kubernetes.io/docs/concepts/services-networking/service/#headless-services
 
   - uuid: 95bcb9ee-7fc7-44a0-99d1-5a28b5b42f6f
     question: What is the main role of a NetworkPolicy in Kubernetes?
     answers:
-      - { value: "To route ingress traffic", correct: false }
-      - { value: "To create CNI plugins", correct: false }
-      - { value: "To assign IPs to services", correct: false }
-      - { value: "To restrict traffic between Pods and namespaces", correct: true }
+      - { value: 'To route ingress traffic', correct: false }
+      - { value: 'To create CNI plugins', correct: false }
+      - { value: 'To assign IPs to services', correct: false }
+      - { value: 'To restrict traffic between Pods and namespaces', correct: true }
     help: https://kubernetes.io/docs/concepts/services-networking/network-policies/
 
   - uuid: 570f42f3-21e7-4a90-b146-9f2c7fd85b4e
     question: Can Kubernetes guarantee pod-to-pod communication across all nodes without additional setup?
     answers:
-      - { value: "Yes, always by default", correct: false }
-      - { value: "Only when using NodePort services", correct: false }
-      - { value: "No, communication is restricted by default", correct: false }
-      - { value: "Only if a proper CNI plugin implementing the flat network model is installed", correct: true }
+      - { value: 'Yes, always by default', correct: false }
+      - { value: 'Only when using NodePort services', correct: false }
+      - { value: 'No, communication is restricted by default', correct: false }
+      - { value: 'Only if a proper CNI plugin implementing the flat network model is installed', correct: true }
     help: https://kubernetes.io/docs/concepts/cluster-administration/networking/
diff --git a/data/4_Networking/http_https_load_balancing.yaml b/data/4_Networking/http_https_load_balancing.yaml
index 4fb4a80..d2bcaaf 100644
--- a/data/4_Networking/http_https_load_balancing.yaml
+++ b/data/4_Networking/http_https_load_balancing.yaml
@@ -2,80 +2,80 @@ questions:
   - uuid: 4a1fc56e-2199-4a8a-a431-0b49966e1db2
     question: What built-in Docker EE feature provides Layer 7 load balancing for HTTP/HTTPS?
     answers:
-      - { value: "Ingress overlay driver", correct: false }
-      - { value: "DNS round robin", correct: false }
-      - { value: "IPVS", correct: false }
-      - { value: "Interlock", correct: true }
+      - { value: 'Ingress overlay driver', correct: false }
+      - { value: 'DNS round robin', correct: false }
+      - { value: 'IPVS', correct: false }
+      - { value: 'Interlock', correct: true }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/interlock/index.html
 
   - uuid: 9189e0aa-8e84-4dcb-8d7b-4e1c87979c5e
     question: Which Docker EE component is used to automatically route traffic to services based on host or path?
     answers:
-      - { value: "Swarm Gossip Protocol", correct: false }
-      - { value: "UCP routing mesh", correct: false }
-      - { value: "Docker Daemon Proxy", correct: false }
-      - { value: "Interlock with NGINX", correct: true }
+      - { value: 'Swarm Gossip Protocol', correct: false }
+      - { value: 'UCP routing mesh', correct: false }
+      - { value: 'Docker Daemon Proxy', correct: false }
+      - { value: 'Interlock with NGINX', correct: true }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/interlock/architecture.html
 
   - uuid: 25aa1e52-5a0c-4b64-89d4-f9d7c0422c1d
     question: In Interlock, what annotation is used to define the virtual host for a service?
     answers:
-      - { value: "com.docker.lb.hosts", correct: true }
-      - { value: "com.docker.routing.host", correct: false }
-      - { value: "com.docker.interlock.virtual", correct: false }
-      - { value: "com.docker.proxy.domain", correct: false }
+      - { value: 'com.docker.lb.hosts', correct: true }
+      - { value: 'com.docker.routing.host', correct: false }
+      - { value: 'com.docker.interlock.virtual', correct: false }
+      - { value: 'com.docker.proxy.domain', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/interlock/configuration/service-labels.html
 
   - uuid: dbfb0283-ea8f-4326-8be5-12f5898d13aa
     question: Which Docker command can be used to deploy a service with Interlock routing enabled?
     answers:
-      - { value: "docker network create --driver=interlock ...", correct: false }
-      - { value: "docker container run --interlock ...", correct: false }
-      - { value: "docker swarm deploy --l7=true ...", correct: false }
-      - { value: "docker service create --label com.docker.lb.hosts=app.example.com ...", correct: true }
+      - { value: 'docker network create --driver=interlock ...', correct: false }
+      - { value: 'docker container run --interlock ...', correct: false }
+      - { value: 'docker swarm deploy --l7=true ...', correct: false }
+      - { value: 'docker service create --label com.docker.lb.hosts=app.example.com ...', correct: true }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/interlock/configuration/service-labels.html
 
   - uuid: 9e42e5fc-3877-4e8f-84ee-22d4463d0cb4
     question: What is required on the UCP node for Interlock to terminate HTTPS traffic?
     answers:
-      - { value: "Swarm manager in leader mode only", correct: false }
-      - { value: "Custom iptables rules", correct: false }
-      - { value: "A valid TLS certificate configured in Interlock", correct: true }
-      - { value: "Bridge mode networking only", correct: false }
+      - { value: 'Swarm manager in leader mode only', correct: false }
+      - { value: 'Custom iptables rules', correct: false }
+      - { value: 'A valid TLS certificate configured in Interlock', correct: true }
+      - { value: 'Bridge mode networking only', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/interlock/configuration/https.html
 
   - uuid: 9d129bcf-7164-4e02-94f1-d107b9ac53ff
     question: How does Interlock achieve high availability for L7 load balancing?
     answers:
-      - { value: "Through kernel-level TCP balancing", correct: false }
-      - { value: "By using Consul for service discovery", correct: false }
-      - { value: "By running Interlock as a replicated service on Swarm", correct: true }
-      - { value: "By binding Interlock to the host’s loopback interface", correct: false }
+      - { value: 'Through kernel-level TCP balancing', correct: false }
+      - { value: 'By using Consul for service discovery', correct: false }
+      - { value: 'By running Interlock as a replicated service on Swarm', correct: true }
+      - { value: 'By binding Interlock to the host’s loopback interface', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/interlock/architecture.html
 
   - uuid: f86c6404-f70c-413c-82b5-68fd66be6971
     question: Which of the following is a correct label to route traffic to a specific path?
     answers:
-      - { value: "com.docker.lb.location=app/*", correct: false }
-      - { value: "com.docker.lb.url-path=/app", correct: false }
-      - { value: "com.docker.lb.rule=PathPrefix:/app", correct: true }
-      - { value: "com.docker.lb.path=/app", correct: false }
+      - { value: 'com.docker.lb.location=app/*', correct: false }
+      - { value: 'com.docker.lb.url-path=/app', correct: false }
+      - { value: 'com.docker.lb.rule=PathPrefix:/app', correct: true }
+      - { value: 'com.docker.lb.path=/app', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/interlock/configuration/service-labels.html
 
   - uuid: 51909358-21f3-4026-b1aa-e83a772ce0f1
     question: What protocol does Interlock use to load balance HTTPS traffic?
     answers:
-      - { value: "Plain TCP round-robin", correct: false }
-      - { value: "QUIC with gRPC fallback", correct: false }
-      - { value: "IP-in-IP encapsulation", correct: false }
-      - { value: "TLS over TCP (Layer 7 termination)", correct: true }
+      - { value: 'Plain TCP round-robin', correct: false }
+      - { value: 'QUIC with gRPC fallback', correct: false }
+      - { value: 'IP-in-IP encapsulation', correct: false }
+      - { value: 'TLS over TCP (Layer 7 termination)', correct: true }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/interlock/architecture.html
 
   - uuid: d6e60e6d-f34d-4e29-aef4-35342db2f0a7
     question: What happens if multiple services are deployed with the same virtual host annotation in Interlock?
     answers:
-      - { value: "Interlock will throw a routing conflict error", correct: false }
-      - { value: "Only the first declared service receives traffic", correct: false }
-      - { value: "They share the same load balancer endpoint and traffic is distributed between them", correct: true }
-      - { value: "They will be placed on different Swarm networks", correct: false }
+      - { value: 'Interlock will throw a routing conflict error', correct: false }
+      - { value: 'Only the first declared service receives traffic', correct: false }
+      - { value: 'They share the same load balancer endpoint and traffic is distributed between them', correct: true }
+      - { value: 'They will be placed on different Swarm networks', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/interlock/configuration/service-labels.html
diff --git a/data/4_Networking/identify_container_ip_port.yaml b/data/4_Networking/identify_container_ip_port.yaml
index 9455ed5..66b05d9 100644
--- a/data/4_Networking/identify_container_ip_port.yaml
+++ b/data/4_Networking/identify_container_ip_port.yaml
@@ -2,71 +2,71 @@ questions:
   - uuid: 7e92be6e-8892-4cb3-a0f3-2a4d32821497
     question: Which Docker command shows the external port mapped to a container's internal port?
     answers:
-      - { value: "docker port <container_id>", correct: true }
-      - { value: "docker ps --ip", correct: false }
-      - { value: "docker inspect --summary", correct: false }
-      - { value: "docker network ls", correct: false }
+      - { value: 'docker port <container_id>', correct: true }
+      - { value: 'docker ps --ip', correct: false }
+      - { value: 'docker inspect --summary', correct: false }
+      - { value: 'docker network ls', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/port/
 
   - uuid: 126dc3ab-2878-4ea3-933f-c8c280d71a9f
     question: What is the result of running `docker port mywebapp` when port 8080 is published as 0.0.0.0:49153?
     answers:
-      - { value: "0.0.0.0:49153/tcp -> 8080", correct: false }
-      - { value: "8080/tcp -> 0.0.0.0:49153", correct: true }
-      - { value: "Port 8080 is not published externally", correct: false }
-      - { value: "49153/tcp -> 0.0.0.0:8080", correct: false }
+      - { value: '0.0.0.0:49153/tcp -> 8080', correct: false }
+      - { value: '8080/tcp -> 0.0.0.0:49153', correct: true }
+      - { value: 'Port 8080 is not published externally', correct: false }
+      - { value: '49153/tcp -> 0.0.0.0:8080', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/port/
 
   - uuid: 236f0c46-725b-4ce8-bb59-e45d7ad5e158
     question: What command can you use to find both the IP and published ports of a running container?
     answers:
-      - { value: "docker logs <container_id>", correct: false }
-      - { value: "docker inspect <container_id>", correct: true }
-      - { value: "docker info", correct: false }
-      - { value: "docker port <container_id> --verbose", correct: false }
+      - { value: 'docker logs <container_id>', correct: false }
+      - { value: 'docker inspect <container_id>', correct: true }
+      - { value: 'docker info', correct: false }
+      - { value: 'docker port <container_id> --verbose', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/inspect/
 
   - uuid: 7d8a63c4-5b6a-4f6a-962f-9b0f0555aabc
     question: Where in `docker inspect` output can you find the container's host IP and port bindings?
     answers:
-      - { value: ".Mounts.Bindings", correct: false }
-      - { value: ".NetworkSettings.Ports", correct: true }
-      - { value: ".HostConfig.DNS", correct: false }
-      - { value: ".Config.ExposedPorts", correct: false }
+      - { value: '.Mounts.Bindings', correct: false }
+      - { value: '.NetworkSettings.Ports', correct: true }
+      - { value: '.HostConfig.DNS', correct: false }
+      - { value: '.Config.ExposedPorts', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/inspect/
 
   - uuid: 37e2a5ee-d5c3-4f37-a03c-01a632fdfeb5
     question: If a container is started with `-p 8080:80`, what port on the host will forward traffic to port 80 in the container?
     answers:
-      - { value: "80", correct: false }
-      - { value: "It depends on the container’s internal IP", correct: false }
-      - { value: "8080", correct: true }
-      - { value: "443", correct: false }
+      - { value: '80', correct: false }
+      - { value: 'It depends on the container’s internal IP', correct: false }
+      - { value: '8080', correct: true }
+      - { value: '443', correct: false }
     help: https://docs.docker.com/config/containers/container-networking/
 
   - uuid: 90d216c4-4582-4eb7-bc71-e176028de54d
     question: What does the IP 0.0.0.0 mean in Docker port bindings?
     answers:
-      - { value: "The container is running in host mode", correct: false }
-      - { value: "The port is exposed to all network interfaces on the host", correct: true }
-      - { value: "The container is not accessible externally", correct: false }
-      - { value: "The port is blocked by a firewall", correct: false }
+      - { value: 'The container is running in host mode', correct: false }
+      - { value: 'The port is exposed to all network interfaces on the host', correct: true }
+      - { value: 'The container is not accessible externally', correct: false }
+      - { value: 'The port is blocked by a firewall', correct: false }
     help: https://docs.docker.com/network/bridge/#accessing-container-ports
 
   - uuid: ed5bfa3d-c11c-4aa9-8c3a-feb71f5e4d58
     question: Which option of `docker run` allows you to publish a container’s port on a specific host IP?
     answers:
-      - { value: "--publish 192.168.1.100:8080:80", correct: true }
-      - { value: "--network 192.168.1.100 --port 80", correct: false }
-      - { value: "--bind 192.168.1.100:80", correct: false }
-      - { value: "--host-ip 192.168.1.100 --port 80", correct: false }
+      - { value: '--publish 192.168.1.100:8080:80', correct: true }
+      - { value: '--network 192.168.1.100 --port 80', correct: false }
+      - { value: '--bind 192.168.1.100:80', correct: false }
+      - { value: '--host-ip 192.168.1.100 --port 80', correct: false }
     help: https://docs.docker.com/config/containers/container-networking/#published-ports
 
   - uuid: c4e930c3-258f-40cd-94ef-21917a9c026d
     question: What does `docker ps` show about container networking?
     answers:
-      - { value: "Port bindings (host → container)", correct: true }
-      - { value: "Container MAC address", correct: false }
-      - { value: "Internal container IP address", correct: false }
-      - { value: "Full docker network topology", correct: false }
+      - { value: 'Port bindings (host → container)', correct: true }
+      - { value: 'Container MAC address', correct: false }
+      - { value: 'Internal container IP address', correct: false }
+      - { value: 'Full docker network topology', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/ps/
diff --git a/data/4_Networking/k8s_clusterip_nodeport.yaml b/data/4_Networking/k8s_clusterip_nodeport.yaml
index be323cf..5cae727 100644
--- a/data/4_Networking/k8s_clusterip_nodeport.yaml
+++ b/data/4_Networking/k8s_clusterip_nodeport.yaml
@@ -2,71 +2,71 @@ questions:
   - uuid: 6237a39b-6ad2-4db3-a68b-41c10d7f4e8e
     question: What is the default Kubernetes service type for exposing a pod?
     answers:
-      - { value: "ClusterIP", correct: true }
-      - { value: "LoadBalancer", correct: false }
-      - { value: "Ingress", correct: false }
-      - { value: "NodePort", correct: false }
+      - { value: 'ClusterIP', correct: true }
+      - { value: 'LoadBalancer', correct: false }
+      - { value: 'Ingress', correct: false }
+      - { value: 'NodePort', correct: false }
     help: https://kubernetes.io/docs/concepts/services-networking/service/#publishing-services-service-types
 
   - uuid: b23b2f0d-32da-47f6-92f0-53cb8b9991ea
     question: How does a ClusterIP service route traffic to a pod?
     answers:
-      - { value: "It creates an Ingress rule pointing to the pod", correct: false }
-      - { value: "It assigns a floating IP to each pod", correct: false }
-      - { value: "It exposes the pod directly on the public IP of the node", correct: false }
-      - { value: "It creates a virtual IP accessible only inside the cluster and forwards traffic to pod endpoints", correct: true }
+      - { value: 'It creates an Ingress rule pointing to the pod', correct: false }
+      - { value: 'It assigns a floating IP to each pod', correct: false }
+      - { value: 'It exposes the pod directly on the public IP of the node', correct: false }
+      - { value: 'It creates a virtual IP accessible only inside the cluster and forwards traffic to pod endpoints', correct: true }
     help: https://kubernetes.io/docs/concepts/services-networking/service/#clusterip
 
   - uuid: 8743182b-9834-4baf-a8b6-c292d7ee3b31
     question: Which statement about NodePort services is correct?
     answers:
-      - { value: "They assign an external IP to each pod", correct: false }
-      - { value: "They expose the service on a static port on each Node’s IP", correct: true }
-      - { value: "They are only available inside the cluster", correct: false }
-      - { value: "They allow external access through a Kubernetes Ingress only", correct: false }
+      - { value: 'They assign an external IP to each pod', correct: false }
+      - { value: 'They expose the service on a static port on each Node’s IP', correct: true }
+      - { value: 'They are only available inside the cluster', correct: false }
+      - { value: 'They allow external access through a Kubernetes Ingress only', correct: false }
     help: https://kubernetes.io/docs/concepts/services-networking/service/#nodeport
 
   - uuid: 17a00a80-246e-4723-8167-e42eb2c6dd7b
     question: What is the default port range used for NodePort services in Kubernetes?
     answers:
-      - { value: "1024–2048", correct: false }
-      - { value: "8080–8888", correct: false }
-      - { value: "30000–32767", correct: true }
-      - { value: "20000–24000", correct: false }
+      - { value: '1024–2048', correct: false }
+      - { value: '8080–8888', correct: false }
+      - { value: '30000–32767', correct: true }
+      - { value: '20000–24000', correct: false }
     help: https://kubernetes.io/docs/concepts/services-networking/service/#nodeport
 
   - uuid: b3ec8d85-b187-4d4e-b7bb-02d19464d816
     question: How can you access a pod exposed by a NodePort service?
     answers:
-      - { value: "Using kubectl proxy only", correct: false }
-      - { value: "Using the ClusterIP address over the internet", correct: false }
-      - { value: "Using the pod IP directly from outside the cluster", correct: false }
-      - { value: "Using <node-ip>:<nodeport>", correct: true }
+      - { value: 'Using kubectl proxy only', correct: false }
+      - { value: 'Using the ClusterIP address over the internet', correct: false }
+      - { value: 'Using the pod IP directly from outside the cluster', correct: false }
+      - { value: 'Using <node-ip>:<nodeport>', correct: true }
     help: https://kubernetes.io/docs/concepts/services-networking/service/#nodeport
 
   - uuid: e9c7fa91-f800-49b4-8fd9-8a84d93352c1
     question: What is a key limitation of ClusterIP services?
     answers:
-      - { value: "They can only expose UDP traffic", correct: false }
-      - { value: "They require a public IP for every pod", correct: false }
-      - { value: "They conflict with kube-dns", correct: false }
-      - { value: "They are not reachable from outside the Kubernetes cluster", correct: true }
+      - { value: 'They can only expose UDP traffic', correct: false }
+      - { value: 'They require a public IP for every pod', correct: false }
+      - { value: 'They conflict with kube-dns', correct: false }
+      - { value: 'They are not reachable from outside the Kubernetes cluster', correct: true }
     help: https://kubernetes.io/docs/concepts/services-networking/service/#publishing-services-service-types
 
   - uuid: 307b1f11-4ee3-44d2-b6e5-1de9e55e9698
     question: What is the purpose of kube-proxy in the context of ClusterIP and NodePort services?
     answers:
-      - { value: "It manages the node firewall for secure access", correct: false }
-      - { value: "It runs Ingress controllers on each node", correct: false }
-      - { value: "It assigns DNS names to services", correct: false }
-      - { value: "It programs iptables/ipvs rules to route traffic to service endpoints", correct: true }
+      - { value: 'It manages the node firewall for secure access', correct: false }
+      - { value: 'It runs Ingress controllers on each node', correct: false }
+      - { value: 'It assigns DNS names to services', correct: false }
+      - { value: 'It programs iptables/ipvs rules to route traffic to service endpoints', correct: true }
     help: https://kubernetes.io/docs/concepts/services-networking/service/#virtual-ips-and-service-proxies
 
   - uuid: a8fa66b6-7028-4a11-b62b-342ba57d16aa
     question: What command can you use to expose a pod using a NodePort service?
     answers:
-      - { value: "kubectl expose pod mypod --port=80 --type=NodePort", correct: true }
-      - { value: "kubectl publish pod mypod --port=80", correct: false }
-      - { value: "kubectl run mypod --expose=NodePort", correct: false }
-      - { value: "kubectl port-forward mypod 80:80", correct: false }
+      - { value: 'kubectl expose pod mypod --port=80 --type=NodePort', correct: true }
+      - { value: 'kubectl publish pod mypod --port=80', correct: false }
+      - { value: 'kubectl run mypod --expose=NodePort', correct: false }
+      - { value: 'kubectl port-forward mypod 80:80', correct: false }
     help: https://kubernetes.io/docs/reference/generated/kubectl/kubectl-commands#expose
diff --git a/data/4_Networking/troubleshoot_container_connectivity.yaml b/data/4_Networking/troubleshoot_container_connectivity.yaml
index ef93f28..6f4b416 100644
--- a/data/4_Networking/troubleshoot_container_connectivity.yaml
+++ b/data/4_Networking/troubleshoot_container_connectivity.yaml
@@ -2,71 +2,71 @@ questions:
   - uuid: 1fdce7fa-221e-4a0a-9481-39e3b7270f6c
     question: Which command lets you view logs generated by a running container?
     answers:
-      - { value: "docker journal <container_id>", correct: false }
-      - { value: "docker logs <container_id>", correct: true }
-      - { value: "docker view --logs <container_id>", correct: false }
-      - { value: "docker inspect logs <container_id>", correct: false }
+      - { value: 'docker journal <container_id>', correct: false }
+      - { value: 'docker logs <container_id>', correct: true }
+      - { value: 'docker view --logs <container_id>', correct: false }
+      - { value: 'docker inspect logs <container_id>', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/logs/
 
   - uuid: ab6f8b94-f195-49cc-8e89-5c3427467fe5
     question: Which command helps diagnose network-related settings of a container?
     answers:
-      - { value: "docker logs <container_id>", correct: false }
-      - { value: "docker inspect <container_id>", correct: true }
-      - { value: "docker ps -a", correct: false }
-      - { value: "docker images", correct: false }
+      - { value: 'docker logs <container_id>', correct: false }
+      - { value: 'docker inspect <container_id>', correct: true }
+      - { value: 'docker ps -a', correct: false }
+      - { value: 'docker images', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/inspect/
 
   - uuid: 56f5126e-34dc-443f-8c18-92e4f69399ef
     question: What section of `docker inspect` output contains the container's network settings?
     answers:
-      - { value: ".HostConfig", correct: false }
-      - { value: ".NetworkSettings", correct: true }
-      - { value: ".State.Network", correct: false }
-      - { value: ".Mounts", correct: false }
+      - { value: '.HostConfig', correct: false }
+      - { value: '.NetworkSettings', correct: true }
+      - { value: '.State.Network', correct: false }
+      - { value: '.Mounts', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/inspect/
 
   - uuid: e02f94aa-0d40-4b63-9e3f-84b4cc68436c
     question: What is a common reason two containers on the same bridge network cannot communicate?
     answers:
-      - { value: "Containers must run with --host networking", correct: false }
-      - { value: "Containers need unique volume names", correct: false }
-      - { value: "DNS resolution is disabled by default", correct: false }
-      - { value: "Exposed ports are not needed for container-to-container communication", correct: true }
+      - { value: 'Containers must run with --host networking', correct: false }
+      - { value: 'Containers need unique volume names', correct: false }
+      - { value: 'DNS resolution is disabled by default', correct: false }
+      - { value: 'Exposed ports are not needed for container-to-container communication', correct: true }
     help: https://docs.docker.com/network/bridge/
 
   - uuid: a1766e64-d4cd-49db-859f-6d1f27f33aa3
     question: How can you view logs for the Docker engine itself on a Linux system using systemd?
     answers:
-      - { value: "systemctl view docker", correct: false }
-      - { value: "journalctl -u docker.service", correct: true }
-      - { value: "docker system logs", correct: false }
-      - { value: "docker logs engine", correct: false }
+      - { value: 'systemctl view docker', correct: false }
+      - { value: 'journalctl -u docker.service', correct: true }
+      - { value: 'docker system logs', correct: false }
+      - { value: 'docker logs engine', correct: false }
     help: https://docs.docker.com/config/daemon/#viewing-engine-logs
 
   - uuid: bbe8dbcc-1d66-4db2-9b19-31d312d2f5e1
     question: A container connected to an overlay network cannot resolve another container’s name. What is the likely issue?
     answers:
-      - { value: "Overlay networks do not support DNS resolution", correct: false }
-      - { value: "The host network is required for DNS lookups", correct: false }
-      - { value: "The container is not attached to the same overlay network", correct: true }
-      - { value: "The container needs a published port", correct: false }
+      - { value: 'Overlay networks do not support DNS resolution', correct: false }
+      - { value: 'The host network is required for DNS lookups', correct: false }
+      - { value: 'The container is not attached to the same overlay network', correct: true }
+      - { value: 'The container needs a published port', correct: false }
     help: https://docs.docker.com/network/overlay/#service-discovery
 
   - uuid: d28924eb-6e99-4b3c-8c6c-c2a416327eb3
     question: What command can help you check whether a container can reach another container by hostname?
     answers:
-      - { value: "docker exec <container> ping <target_container_name>", correct: true }
-      - { value: "docker inspect --trace", correct: false }
-      - { value: "docker logs --connectivity-check", correct: false }
-      - { value: "docker ps --ping", correct: false }
+      - { value: 'docker exec <container> ping <target_container_name>', correct: true }
+      - { value: 'docker inspect --trace', correct: false }
+      - { value: 'docker logs --connectivity-check', correct: false }
+      - { value: 'docker ps --ping', correct: false }
     help: https://docs.docker.com/network/bridge/#communicating-between-containers
 
   - uuid: 9e963a4f-38f2-4fef-8f55-b79c9cf61f35
     question: How can you confirm if a container is attached to the correct network?
     answers:
-      - { value: "docker service ls --networks", correct: false }
-      - { value: "docker logs <container_id> --network", correct: false }
-      - { value: "docker network inspect <network_name>", correct: true }
-      - { value: "docker container status <container_id>", correct: false }
+      - { value: 'docker service ls --networks', correct: false }
+      - { value: 'docker logs <container_id> --network', correct: false }
+      - { value: 'docker network inspect <network_name>', correct: true }
+      - { value: 'docker container status <container_id>', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/network_inspect/
diff --git a/data/4_Networking/understand_engine_registry_ucp_traffic.yaml b/data/4_Networking/understand_engine_registry_ucp_traffic.yaml
index 396c0bb..5952407 100644
--- a/data/4_Networking/understand_engine_registry_ucp_traffic.yaml
+++ b/data/4_Networking/understand_engine_registry_ucp_traffic.yaml
@@ -2,44 +2,44 @@ questions:
   - uuid: ed1fc470-c68e-4bc2-a370-d3ad456c6b29
     question: What traffic is used between Docker engine and DTR when pulling signed images?
     answers:
-      - { value: "SSH with verified fingerprints", correct: false }
-      - { value: "DNS-over-HTTPS", correct: false }
-      - { value: "HTTPS using Docker Content Trust (Notary)", correct: true }
-      - { value: "QUIC + gRPC", correct: false }
+      - { value: 'SSH with verified fingerprints', correct: false }
+      - { value: 'DNS-over-HTTPS', correct: false }
+      - { value: 'HTTPS using Docker Content Trust (Notary)', correct: true }
+      - { value: 'QUIC + gRPC', correct: false }
     help: https://docs.docker.com/engine/security/trust/
 
   - uuid: 36802f55-cf02-4267-b5c2-40f98988292f
     question: What is the main role of TLS in communications between UCP components?
     answers:
-      - { value: "To enable NAT between subnets", correct: false }
-      - { value: "To encrypt and authenticate API and control traffic", correct: true }
-      - { value: "To scan images before they are deployed", correct: false }
-      - { value: "To compress traffic between nodes", correct: false }
+      - { value: 'To enable NAT between subnets', correct: false }
+      - { value: 'To encrypt and authenticate API and control traffic', correct: true }
+      - { value: 'To scan images before they are deployed', correct: false }
+      - { value: 'To compress traffic between nodes', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/architecture/ucp-architecture.html
 
   - uuid: 81e2853a-d116-4bce-a352-623ed2a0a3f2
     question: How is traffic from the Docker CLI to UCP authenticated?
     answers:
-      - { value: "By using bearer tokens stored in secrets.json", correct: false }
-      - { value: "Using a client bundle with certificates and keys", correct: true }
-      - { value: "With a GitHub token", correct: false }
-      - { value: "Through SSH with a known_hosts file", correct: false }
+      - { value: 'By using bearer tokens stored in secrets.json', correct: false }
+      - { value: 'Using a client bundle with certificates and keys', correct: true }
+      - { value: 'With a GitHub token', correct: false }
+      - { value: 'Through SSH with a known_hosts file', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/user-access/cli-access.html
 
   - uuid: f68d7f5f-cd49-4639-bf56-d504f36a4423
     question: Which type of overlay network does UCP use for internal control traffic?
     answers:
-      - { value: "Plain IP forwarding", correct: false }
-      - { value: "Host networking with NAT", correct: false }
-      - { value: "Bridge networks with exposed ports", correct: false }
-      - { value: "TLS-encrypted overlay networks", correct: true }
+      - { value: 'Plain IP forwarding', correct: false }
+      - { value: 'Host networking with NAT', correct: false }
+      - { value: 'Bridge networks with exposed ports', correct: false }
+      - { value: 'TLS-encrypted overlay networks', correct: true }
     help: https://docs.docker.com/network/overlay/#secure-by-default
 
   - uuid: e0a650de-b008-470b-915f-98a40386ea66
     question: Which port must be open for a Docker engine to join a Swarm cluster?
     answers:
-      - { value: "5000 (HTTP)", correct: false }
-      - { value: "443 (UDP)", correct: false }
-      - { value: "2377 (TCP)", correct: true }
-      - { value: "7946 (UDP)", correct: false }
+      - { value: '5000 (HTTP)', correct: false }
+      - { value: '443 (UDP)', correct: false }
+      - { value: '2377 (TCP)', correct: true }
+      - { value: '7946 (UDP)', correct: false }
     help: https://docs.docker.com/engine/swarm/swarm-tutorial/#open-protocols-between-nodes
diff --git a/data/5_Security/compare_contrast_ucp_workers_managers.yaml b/data/5_Security/compare_contrast_ucp_workers_managers.yaml
index 27461be..1eff35a 100644
--- a/data/5_Security/compare_contrast_ucp_workers_managers.yaml
+++ b/data/5_Security/compare_contrast_ucp_workers_managers.yaml
@@ -2,80 +2,80 @@ questions:
   - uuid: 38211d9e-34f3-4b3f-9015-c837acc741f7
     question: What is the main role of a UCP manager node?
     answers:
-      - { value: "To manage the cluster state and orchestrate services", correct: true }
-      - { value: "To provide storage to the cluster", correct: false }
-      - { value: "To replicate volumes across nodes", correct: false }
-      - { value: "To run user containers only", correct: false }
+      - { value: 'To manage the cluster state and orchestrate services', correct: true }
+      - { value: 'To provide storage to the cluster', correct: false }
+      - { value: 'To replicate volumes across nodes', correct: false }
+      - { value: 'To run user containers only', correct: false }
     help: https://docs.docker.com/datacenter/ucp/2.2/guides/architecture/
 
   - uuid: d2133e4b-8121-4b96-8b6c-e3b01e26913c
     question: What is the purpose of a UCP worker node?
     answers:
-      - { value: "To run containers and services scheduled by managers", correct: true }
-      - { value: "To configure TLS certificates", correct: false }
-      - { value: "To manage user access and RBAC", correct: false }
-      - { value: "To encrypt node communication", correct: false }
+      - { value: 'To run containers and services scheduled by managers', correct: true }
+      - { value: 'To configure TLS certificates', correct: false }
+      - { value: 'To manage user access and RBAC', correct: false }
+      - { value: 'To encrypt node communication', correct: false }
     help: https://docs.docker.com/datacenter/ucp/2.2/guides/architecture/
 
   - uuid: 1bb29ae7-3c69-4f5e-a899-b3f2312a69cf
     question: Which nodes in UCP can access the control plane?
     answers:
-      - { value: "Manager nodes only", correct: true }
-      - { value: "Only nodes with secrets", correct: false }
-      - { value: "All nodes equally", correct: false }
-      - { value: "Worker nodes only", correct: false }
+      - { value: 'Manager nodes only', correct: true }
+      - { value: 'Only nodes with secrets', correct: false }
+      - { value: 'All nodes equally', correct: false }
+      - { value: 'Worker nodes only', correct: false }
     help: https://docs.docker.com/datacenter/ucp/2.2/guides/architecture/
 
   - uuid: e8ed4b37-4703-4f82-9471-ec42be7e217e
     question: What happens if all UCP manager nodes fail?
     answers:
-      - { value: "The cluster loses control plane access and cannot schedule new tasks", correct: true }
-      - { value: "Worker nodes promote themselves automatically", correct: false }
-      - { value: "Managers are recreated from backups automatically", correct: false }
-      - { value: "Containers stop immediately", correct: false }
+      - { value: 'The cluster loses control plane access and cannot schedule new tasks', correct: true }
+      - { value: 'Worker nodes promote themselves automatically', correct: false }
+      - { value: 'Managers are recreated from backups automatically', correct: false }
+      - { value: 'Containers stop immediately', correct: false }
     help: https://docs.docker.com/datacenter/ucp/2.2/guides/architecture/
 
   - uuid: 54244b0b-b9fc-4b3f-887a-c75889ffbe2f
     question: Which of the following best describes a UCP worker node?
     answers:
-      - { value: "It handles volume plugins", correct: false }
-      - { value: "It manages access control policies", correct: false }
-      - { value: "It executes tasks assigned by the manager", correct: true }
-      - { value: "It controls certificate rotation", correct: false }
+      - { value: 'It handles volume plugins', correct: false }
+      - { value: 'It manages access control policies', correct: false }
+      - { value: 'It executes tasks assigned by the manager', correct: true }
+      - { value: 'It controls certificate rotation', correct: false }
     help: https://docs.docker.com/datacenter/ucp/2.2/guides/architecture/
 
   - uuid: 5e73fd94-128d-4b2d-bd25-4bc9dcbe914f
     question: How can you ensure high availability for UCP manager nodes?
     answers:
-      - { value: "Deploy all managers on the same host", correct: false }
-      - { value: "Run an odd number of managers distributed across hosts", correct: true }
-      - { value: "Use only worker nodes and promote them as needed", correct: false }
-      - { value: "Use only one powerful manager node", correct: false }
+      - { value: 'Deploy all managers on the same host', correct: false }
+      - { value: 'Run an odd number of managers distributed across hosts', correct: true }
+      - { value: 'Use only worker nodes and promote them as needed', correct: false }
+      - { value: 'Use only one powerful manager node', correct: false }
     help: https://docs.docker.com/datacenter/ucp/2.2/guides/architecture/
 
   - uuid: 56b99163-baf8-4c3f-8a4b-5a31352f150c
     question: Can UCP worker nodes be promoted to manager roles?
     answers:
-      - { value: "Yes, using Docker CLI or UI", correct: true }
-      - { value: "Only on Kubernetes clusters", correct: false }
-      - { value: "No, workers are static roles", correct: false }
-      - { value: "Only if they store persistent data", correct: false }
+      - { value: 'Yes, using Docker CLI or UI', correct: true }
+      - { value: 'Only on Kubernetes clusters', correct: false }
+      - { value: 'No, workers are static roles', correct: false }
+      - { value: 'Only if they store persistent data', correct: false }
     help: https://docs.docker.com/reference/cli/docker/node/promote/
 
   - uuid: 6a314420-c878-4d32-9472-91c287c8eeed
     question: Why should the number of UCP managers be odd?
     answers:
-      - { value: "To save RAM", correct: false }
-      - { value: "To reduce network hops", correct: false }
-      - { value: "To maintain quorum for Raft consensus", correct: true }
-      - { value: "To reduce TLS overhead", correct: false }
+      - { value: 'To save RAM', correct: false }
+      - { value: 'To reduce network hops', correct: false }
+      - { value: 'To maintain quorum for Raft consensus', correct: true }
+      - { value: 'To reduce TLS overhead', correct: false }
     help: https://docs.docker.com/engine/swarm/raft/
 
   - uuid: a00efea0-78b0-4f68-82aa-85993f13d2d4
     question: Which type of node has access to UCP's RBAC enforcement and API?
     answers:
-      - { value: "All overlay networks", correct: false }
-      - { value: "Worker nodes", correct: false }
-      - { value: "Manager nodes", correct: true }
-      - { value: "Only Linux hosts", correct: false }
+      - { value: 'All overlay networks', correct: false }
+      - { value: 'Worker nodes', correct: false }
+      - { value: 'Manager nodes', correct: true }
+      - { value: 'Only Linux hosts', correct: false }
     help: https://docs.docker.com/datacenter/ucp/2.2/guides/access-control/overview/
diff --git a/data/5_Security/describe_default_engine_security.yaml b/data/5_Security/describe_default_engine_security.yaml
index fb3dacc..6c32c4c 100644
--- a/data/5_Security/describe_default_engine_security.yaml
+++ b/data/5_Security/describe_default_engine_security.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: e95854cd-9b19-4e15-8dc8-e3f5ad2539f1
     question: What user does a Docker container run as by default?
     answers:
-      - { value: "host user", correct: false }
-      - { value: "nobody", correct: false }
-      - { value: "root", correct: true }
-      - { value: "dockeruser", correct: false }
+      - { value: 'host user', correct: false }
+      - { value: 'nobody', correct: false }
+      - { value: 'root', correct: true }
+      - { value: 'dockeruser', correct: false }
     help: 'https://docs.docker.com/engine/security/'
 
   - uuid: 8fc6a769-0a3b-476e-9059-d9bfc03a5295
     question: Which Linux kernel feature provides namespace isolation in Docker?
     answers:
-      - { value: "Systemd", correct: false }
-      - { value: "rsyslog", correct: false }
-      - { value: "iptables", correct: false }
-      - { value: "Namespaces", correct: true }
+      - { value: 'Systemd', correct: false }
+      - { value: 'rsyslog', correct: false }
+      - { value: 'iptables', correct: false }
+      - { value: 'Namespaces', correct: true }
     help: 'https://docs.docker.com/engine/security/#docker-daemon-attack-surface'
 
   - uuid: 845267c4-d3b4-4e8c-b9d3-f07ed7c5d8ea
     question: What does Docker's default seccomp profile do?
     answers:
-      - { value: "Removes all Linux capabilities", correct: false }
-      - { value: "Prevents container from binding to ports", correct: false }
-      - { value: "Blocks access to the host file system", correct: false }
-      - { value: "Blocks system calls known to be unsafe", correct: true }
+      - { value: 'Removes all Linux capabilities', correct: false }
+      - { value: 'Prevents container from binding to ports', correct: false }
+      - { value: 'Blocks access to the host file system', correct: false }
+      - { value: 'Blocks system calls known to be unsafe', correct: true }
     help: 'https://docs.docker.com/engine/security/seccomp/'
 
   - uuid: fdc98716-2cf6-4526-9f9b-7590f1b3d7d7
     question: What is the default AppArmor profile used by Docker on supported systems?
     answers:
-      - { value: "custom-docker", correct: false }
-      - { value: "docker-default", correct: true }
-      - { value: "unconfined", correct: false }
-      - { value: "apparmor-deny-all", correct: false }
+      - { value: 'custom-docker', correct: false }
+      - { value: 'docker-default', correct: true }
+      - { value: 'unconfined', correct: false }
+      - { value: 'apparmor-deny-all', correct: false }
     help: 'https://docs.docker.com/engine/security/apparmor/'
 
   - uuid: dfa9e658-6d90-4f91-9e56-bf24589a9d71
     question: What is the default behavior for container networking in Docker?
     answers:
-      - { value: "Containers are placed on a bridge network", correct: true }
-      - { value: "Containers use overlay networks by default", correct: false }
+      - { value: 'Containers are placed on a bridge network', correct: true }
+      - { value: 'Containers use overlay networks by default', correct: false }
       - { value: "Containers share the host's network namespace", correct: false }
-      - { value: "Containers are isolated with no networking", correct: false }
+      - { value: 'Containers are isolated with no networking', correct: false }
     help: 'https://docs.docker.com/network/bridge/'
 
   - uuid: 6f42fdd9-d1e6-4c8b-944f-54200937a180
     question: Which of the following is a risk of running containers as root (the default)?
     answers:
-      - { value: "They are unable to use bind mounts", correct: false }
-      - { value: "They may access host resources if misconfigured", correct: true }
-      - { value: "They cannot access environment variables", correct: false }
+      - { value: 'They are unable to use bind mounts', correct: false }
+      - { value: 'They may access host resources if misconfigured', correct: true }
+      - { value: 'They cannot access environment variables', correct: false }
       - { value: "They won't be able to start properly", correct: false }
     help: 'https://docs.docker.com/engine/security/'
 
   - uuid: b3a49195-c560-42b2-981f-d987279adf6f
     question: What default capability is removed when running a container with --cap-drop=ALL?
     answers:
-      - { value: "Namespace support", correct: false }
-      - { value: "Networking", correct: false }
-      - { value: "All Linux capabilities", correct: true }
-      - { value: "Filesystem access", correct: false }
+      - { value: 'Namespace support', correct: false }
+      - { value: 'Networking', correct: false }
+      - { value: 'All Linux capabilities', correct: true }
+      - { value: 'Filesystem access', correct: false }
     help: 'https://docs.docker.com/engine/security/'
 
   - uuid: 6c826387-1b40-4214-8a16-35c2f56f49c2
     question: What does Docker's user namespace remapping feature do?
     answers:
-      - { value: "Maps container root to a non-root host user", correct: true }
-      - { value: "Forces all containers to use AppArmor", correct: false }
-      - { value: "Enables MTLS on containers", correct: false }
-      - { value: "Disables networking between containers", correct: false }
+      - { value: 'Maps container root to a non-root host user', correct: true }
+      - { value: 'Forces all containers to use AppArmor', correct: false }
+      - { value: 'Enables MTLS on containers', correct: false }
+      - { value: 'Disables networking between containers', correct: false }
     help: 'https://docs.docker.com/engine/security/userns-remap/'
 
   - uuid: e88dfcb6-3a48-49f7-85f8-1a190fa1f0c1
     question: By default, can Docker containers read host files?
     answers:
-      - { value: "Yes, they can read /etc and /var", correct: false }
-      - { value: "No, unless volumes are explicitly mounted", correct: true }
-      - { value: "Yes, always", correct: false }
-      - { value: "Only if running as non-root", correct: false }
+      - { value: 'Yes, they can read /etc and /var', correct: false }
+      - { value: 'No, unless volumes are explicitly mounted', correct: true }
+      - { value: 'Yes, always', correct: false }
+      - { value: 'Only if running as non-root', correct: false }
     help: 'https://docs.docker.com/storage/volumes/'
 
   - uuid: 206cefb9-73b3-4d99-b209-6d6b36f5154c
     question: What isolation model is used by Docker on Linux by default?
     answers:
-      - { value: "Hypervisor-level sandboxing", correct: false }
-      - { value: "Virtual machine-based isolation", correct: false }
-      - { value: "ContainerD secure enclave", correct: false }
-      - { value: "Process-based isolation using namespaces and cgroups", correct: true }
+      - { value: 'Hypervisor-level sandboxing', correct: false }
+      - { value: 'Virtual machine-based isolation', correct: false }
+      - { value: 'ContainerD secure enclave', correct: false }
+      - { value: 'Process-based isolation using namespaces and cgroups', correct: true }
     help: 'https://docs.docker.com/engine/security/#docker-daemon-attack-surface'
diff --git a/data/5_Security/describe_demonstrate_how_enable_docker_content_trust.yaml b/data/5_Security/describe_demonstrate_how_enable_docker_content_trust.yaml
index 37c9d85..1765fe0 100644
--- a/data/5_Security/describe_demonstrate_how_enable_docker_content_trust.yaml
+++ b/data/5_Security/describe_demonstrate_how_enable_docker_content_trust.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: e83db8f3-44c6-46df-b963-16c74b9e0e2e
     question: What is the purpose of Docker Content Trust (DCT)?
     answers:
-      - { value: "To encrypt Docker images", correct: false }
-      - { value: "To enforce runtime security profiles", correct: false }
-      - { value: "To ensure that images are signed and verified before being used", correct: true }
-      - { value: "To scan images for malware", correct: false }
+      - { value: 'To encrypt Docker images', correct: false }
+      - { value: 'To enforce runtime security profiles', correct: false }
+      - { value: 'To ensure that images are signed and verified before being used', correct: true }
+      - { value: 'To scan images for malware', correct: false }
     help: 'https://docs.docker.com/engine/security/trust/content_trust/'
 
   - uuid: c3b9b71e-133f-4d5d-85b5-800dd3281bd2
     question: How do you enable Docker Content Trust for a single command?
     answers:
-      - { value: "Set the DCT environment variable: `DOCKER_CONTENT_TRUST=1`", correct: true }
-      - { value: "Run `docker trust enable`", correct: false }
-      - { value: "Add --secure=true to the Docker CLI", correct: false }
-      - { value: "Enable it from the Docker Dashboard", correct: false }
+      - { value: 'Set the DCT environment variable: `DOCKER_CONTENT_TRUST=1`', correct: true }
+      - { value: 'Run `docker trust enable`', correct: false }
+      - { value: 'Add --secure=true to the Docker CLI', correct: false }
+      - { value: 'Enable it from the Docker Dashboard', correct: false }
     help: 'https://docs.docker.com/engine/security/trust/content_trust/#enabling-docker-content-trust'
 
   - uuid: 5a78b346-c49e-40a4-a682-5a7f5fbd49e2
     question: What happens when Docker Content Trust is enabled and you try to pull an unsigned image?
     answers:
-      - { value: "The image is signed automatically", correct: false }
-      - { value: "The image is pulled in read-only mode", correct: false }
-      - { value: "The image is pulled but marked as unverified", correct: false }
-      - { value: "The pull is blocked and an error is returned", correct: true }
+      - { value: 'The image is signed automatically', correct: false }
+      - { value: 'The image is pulled in read-only mode', correct: false }
+      - { value: 'The image is pulled but marked as unverified', correct: false }
+      - { value: 'The pull is blocked and an error is returned', correct: true }
     help: 'https://docs.docker.com/engine/security/trust/content_trust/#pulling-signed-images'
 
   - uuid: 3a392593-9ae8-4b14-9264-b6f6db06d0b1
     question: Which environment variable must be set to enforce Docker Content Trust globally?
     answers:
-      - { value: "DCT_ENABLED=true", correct: false }
-      - { value: "DOCKER_TRUSTED=1", correct: false }
-      - { value: "ENABLE_TRUST=1", correct: false }
-      - { value: "DOCKER_CONTENT_TRUST=1", correct: true }
+      - { value: 'DCT_ENABLED=true', correct: false }
+      - { value: 'DOCKER_TRUSTED=1', correct: false }
+      - { value: 'ENABLE_TRUST=1', correct: false }
+      - { value: 'DOCKER_CONTENT_TRUST=1', correct: true }
     help: 'https://docs.docker.com/engine/security/trust/content_trust/#enabling-docker-content-trust'
 
   - uuid: e2a0b3e3-bcb8-45b2-a1b6-7e77d28f85eb
     question: What is required to sign an image with Docker Content Trust?
     answers:
-      - { value: "A root key and a repository key", correct: true }
-      - { value: "Access to Docker EE license", correct: false }
-      - { value: "UCP admin privileges", correct: false }
-      - { value: "TLS certificate and key", correct: false }
+      - { value: 'A root key and a repository key', correct: true }
+      - { value: 'Access to Docker EE license', correct: false }
+      - { value: 'UCP admin privileges', correct: false }
+      - { value: 'TLS certificate and key', correct: false }
     help: 'https://docs.docker.com/engine/security/trust/'
 
   - uuid: 02eb5f4a-8f6b-4c3a-8a63-d8b6b3b7faba
     question: Which Docker CLI command can be used to view trusted image signatures?
     answers:
-      - { value: "docker image trust show <image>", correct: false }
-      - { value: "docker trust inspect --pretty <image>", correct: true }
-      - { value: "docker inspect-trust <image>", correct: false }
-      - { value: "docker trust status <image>", correct: false }
+      - { value: 'docker image trust show <image>', correct: false }
+      - { value: 'docker trust inspect --pretty <image>', correct: true }
+      - { value: 'docker inspect-trust <image>', correct: false }
+      - { value: 'docker trust status <image>', correct: false }
     help: 'https://docs.docker.com/reference/cli/docker/trust/inspect/'
 
   - uuid: 2131a4fd-42ec-4265-b36e-96055d5cb14e
     question: Which command initializes a repository for signing with DCT?
     answers:
-      - { value: "docker trust enable", correct: false }
-      - { value: "docker trust init", correct: false }
-      - { value: "docker sign create", correct: false }
-      - { value: "docker trust signer add", correct: true }
+      - { value: 'docker trust enable', correct: false }
+      - { value: 'docker trust init', correct: false }
+      - { value: 'docker sign create', correct: false }
+      - { value: 'docker trust signer add', correct: true }
     help: 'https://docs.docker.com/reference/cli/docker/trust/signer/add/'
 
   - uuid: 9333d417-5d61-4e69-90ac-6096603cf85d
     question: How does Docker Content Trust verify image integrity?
     answers:
-      - { value: "By scanning for vulnerabilities", correct: false }
-      - { value: "By verifying cryptographic signatures", correct: true }
-      - { value: "By validating image digests against SHA1 hashes", correct: false }
-      - { value: "By comparing the size of image layers", correct: false }
+      - { value: 'By scanning for vulnerabilities', correct: false }
+      - { value: 'By verifying cryptographic signatures', correct: true }
+      - { value: 'By validating image digests against SHA1 hashes', correct: false }
+      - { value: 'By comparing the size of image layers', correct: false }
     help: 'https://docs.docker.com/engine/security/trust/content_trust/#how-content-trust-works'
 
   - uuid: 420c14f1-000d-4216-8b08-3ab8c8dc2e6a
     question: What is the behavior of the `docker push` command when DCT is enabled?
     answers:
-      - { value: "The image is encrypted", correct: false }
-      - { value: "The image is signed before being pushed", correct: true }
-      - { value: "The push command is blocked", correct: false }
-      - { value: "Nothing changes from regular push", correct: false }
+      - { value: 'The image is encrypted', correct: false }
+      - { value: 'The image is signed before being pushed', correct: true }
+      - { value: 'The push command is blocked', correct: false }
+      - { value: 'Nothing changes from regular push', correct: false }
     help: 'https://docs.docker.com/engine/security/trust/content_trust/#pushing-signed-images'
 
   - uuid: b27e9637-57a8-4626-9aa5-0fbb3bcfe254
     question: Which of the following commands will fail if DCT is enabled and the image is unsigned?
     answers:
-      - { value: "docker ps", correct: false }
-      - { value: "docker image ls", correct: false }
-      - { value: "docker pull", correct: true }
-      - { value: "docker run", correct: false }
+      - { value: 'docker ps', correct: false }
+      - { value: 'docker image ls', correct: false }
+      - { value: 'docker pull', correct: true }
+      - { value: 'docker run', correct: false }
     help: 'https://docs.docker.com/engine/security/trust/content_trust/#pulling-signed-images'
diff --git a/data/5_Security/describe_mtls.yaml b/data/5_Security/describe_mtls.yaml
index 2df1818..e545501 100644
--- a/data/5_Security/describe_mtls.yaml
+++ b/data/5_Security/describe_mtls.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: 1a6fcd49-0bd6-49a3-9df2-2f4c05fc6ba6
     question: What is the primary purpose of Mutual TLS (mTLS) in Docker environments?
     answers:
-      - { value: "To enable non-root containers to access host volumes", correct: false }
-      - { value: "To encrypt container images during transit", correct: false }
-      - { value: "To ensure that both the client and server authenticate each other", correct: true }
-      - { value: "To perform image signature verification at runtime", correct: false }
+      - { value: 'To enable non-root containers to access host volumes', correct: false }
+      - { value: 'To encrypt container images during transit', correct: false }
+      - { value: 'To ensure that both the client and server authenticate each other', correct: true }
+      - { value: 'To perform image signature verification at runtime', correct: false }
     help: https://docs.docker.com/engine/security/https/
 
   - uuid: 694d999f-d855-44ef-9630-23d0bb61eb79
     question: In a Docker Swarm cluster, what component uses mTLS by default?
     answers:
-      - { value: "The communication between manager and worker nodes", correct: true }
-      - { value: "Container-to-container HTTP traffic", correct: false }
-      - { value: "Inter-container DNS resolution", correct: false }
-      - { value: "Registry push/pull operations", correct: false }
+      - { value: 'The communication between manager and worker nodes', correct: true }
+      - { value: 'Container-to-container HTTP traffic', correct: false }
+      - { value: 'Inter-container DNS resolution', correct: false }
+      - { value: 'Registry push/pull operations', correct: false }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/pki/
 
   - uuid: 30f22cfa-20eb-4726-a7e1-4f3f317aa008
     question: What happens in mTLS when the server cannot verify the client certificate?
     answers:
-      - { value: "The server allows the connection but disables encryption", correct: false }
-      - { value: "Only unidirectional TLS is used", correct: false }
-      - { value: "The connection is rejected", correct: true }
-      - { value: "The server requests a new certificate from the client", correct: false }
+      - { value: 'The server allows the connection but disables encryption', correct: false }
+      - { value: 'Only unidirectional TLS is used', correct: false }
+      - { value: 'The connection is rejected', correct: true }
+      - { value: 'The server requests a new certificate from the client', correct: false }
     help: https://docs.docker.com/engine/security/https/
 
   - uuid: 3bdc6a4e-d8fd-4c8c-a56e-b8eaa36a9695
     question: Which files must be present on the client side to establish a successful mTLS connection with the Docker daemon?
     answers:
-      - { value: "Docker config.json and access policy", correct: false }
-      - { value: "Client certificate, client key, and CA certificate", correct: true }
-      - { value: "Client token and Docker Hub credentials", correct: false }
-      - { value: "Server certificate and private registry password", correct: false }
+      - { value: 'Docker config.json and access policy', correct: false }
+      - { value: 'Client certificate, client key, and CA certificate', correct: true }
+      - { value: 'Client token and Docker Hub credentials', correct: false }
+      - { value: 'Server certificate and private registry password', correct: false }
     help: https://docs.docker.com/engine/security/https/
 
   - uuid: 8e62f013-5a35-4d43-a32d-02b9cbd837d2
     question: Why is mTLS considered more secure than standard TLS?
     answers:
-      - { value: "Because it uses DNS over HTTPS internally", correct: false }
-      - { value: "Because it relies solely on API keys for access control", correct: false }
-      - { value: "Because both parties authenticate each other, not just the server", correct: true }
-      - { value: "Because it uses symmetric encryption", correct: false }
+      - { value: 'Because it uses DNS over HTTPS internally', correct: false }
+      - { value: 'Because it relies solely on API keys for access control', correct: false }
+      - { value: 'Because both parties authenticate each other, not just the server', correct: true }
+      - { value: 'Because it uses symmetric encryption', correct: false }
     help: https://docs.docker.com/engine/security/https/
 
   - uuid: 6e417ffc-617e-4e88-8f5c-9e88b758ac65
     question: How often does Docker Swarm automatically rotate node certificates?
     answers:
-      - { value: "Every 30 days", correct: false }
-      - { value: "Only when manually triggered by the administrator", correct: false }
-      - { value: "Every 24 hours", correct: false }
-      - { value: "Every 90 days by default", correct: true }
+      - { value: 'Every 30 days', correct: false }
+      - { value: 'Only when manually triggered by the administrator', correct: false }
+      - { value: 'Every 24 hours', correct: false }
+      - { value: 'Every 90 days by default', correct: true }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/pki/
 
   - uuid: 7bdc04f1-38c4-4992-9f21-90c4a607fcf3
     question: Which Docker command can be used to rotate the Swarm CA certificate manually?
     answers:
-      - { value: "docker swarm update-ca", correct: false }
-      - { value: "docker node rotate-cert", correct: false }
-      - { value: "docker swarm cert-rotate", correct: false }
-      - { value: "docker swarm ca --rotate", correct: true }
+      - { value: 'docker swarm update-ca', correct: false }
+      - { value: 'docker node rotate-cert', correct: false }
+      - { value: 'docker swarm cert-rotate', correct: false }
+      - { value: 'docker swarm ca --rotate', correct: true }
     help: https://docs.docker.com/reference/cli/docker/swarm/ca/
 
   - uuid: 6cb6716c-46d9-4301-877e-4c559fc1736f
     question: What does the --opt encrypted flag do when creating a Docker overlay network?
     answers:
-      - { value: "It enables encryption for Docker Compose volumes", correct: false }
-      - { value: "It encrypts data during docker pull operations", correct: false }
-      - { value: "It encrypts only inter-manager communication in the swarm", correct: false }
-      - { value: "It enables encryption for all container traffic on that network", correct: true }
+      - { value: 'It enables encryption for Docker Compose volumes', correct: false }
+      - { value: 'It encrypts data during docker pull operations', correct: false }
+      - { value: 'It encrypts only inter-manager communication in the swarm', correct: false }
+      - { value: 'It enables encryption for all container traffic on that network', correct: true }
     help: https://docs.docker.com/engine/swarm/networking/
 
   - uuid: 4e17c86e-1d1c-48b6-a1dc-5e05d1e3a03e
     question: Is mTLS enabled by default when you initialize a Docker Swarm?
     answers:
-      - { value: "No, it requires setting a --secure flag", correct: false }
-      - { value: "Yes, mTLS is enabled by default for all swarm node communications", correct: true }
-      - { value: "No, it must be enabled using docker swarm update", correct: false }
-      - { value: "Only if the CA is provided during init", correct: false }
+      - { value: 'No, it requires setting a --secure flag', correct: false }
+      - { value: 'Yes, mTLS is enabled by default for all swarm node communications', correct: true }
+      - { value: 'No, it must be enabled using docker swarm update', correct: false }
+      - { value: 'Only if the CA is provided during init', correct: false }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/pki/
 
   - uuid: 3f7409ec-14f1-4c38-9c6e-768cfe9f7c43
     question: What do the letters in 'mTLS' stand for?
     answers:
-      - { value: "Modular Transport Layer Standard", correct: false }
-      - { value: "Managed TLS Security", correct: false }
-      - { value: "Mutual Transport Layer Security", correct: true }
-      - { value: "Multipath TLS", correct: false }
+      - { value: 'Modular Transport Layer Standard', correct: false }
+      - { value: 'Managed TLS Security', correct: false }
+      - { value: 'Mutual Transport Layer Security', correct: true }
+      - { value: 'Multipath TLS', correct: false }
     help: https://docs.docker.com/engine/security/https/
diff --git a/data/5_Security/describe_process_signing_image.yaml b/data/5_Security/describe_process_signing_image.yaml
index 914b68a..2828efd 100644
--- a/data/5_Security/describe_process_signing_image.yaml
+++ b/data/5_Security/describe_process_signing_image.yaml
@@ -2,109 +2,109 @@ questions:
   - uuid: 1688d9c4-231c-4c8f-9d9a-9e7d4f1b657e
     question: What is the main purpose of signing a Docker image?
     answers:
-      - { value: "To publish the image to all registries", correct: false }
-      - { value: "To add a tag to the image", correct: false }
-      - { value: "To compress the image layers for faster uploads", correct: false }
-      - { value: "To ensure the image comes from a trusted source and has not been tampered with", correct: true }
+      - { value: 'To publish the image to all registries', correct: false }
+      - { value: 'To add a tag to the image', correct: false }
+      - { value: 'To compress the image layers for faster uploads', correct: false }
+      - { value: 'To ensure the image comes from a trusted source and has not been tampered with', correct: true }
     help: https://github.com/notaryproject/notary
 
   - uuid: 2b9e7e4c-27f5-44d3-b0fd-199cd77a1521
     question: Which Docker feature is used for signing images?
     answers:
-      - { value: "Docker Security Engine (DSE)", correct: false }
-      - { value: "Docker Swarm Authenticator", correct: false }
-      - { value: "Docker Encryption Protocol (DEP)", correct: false }
-      - { value: "Docker Content Trust (DCT)", correct: true }
+      - { value: 'Docker Security Engine (DSE)', correct: false }
+      - { value: 'Docker Swarm Authenticator', correct: false }
+      - { value: 'Docker Encryption Protocol (DEP)', correct: false }
+      - { value: 'Docker Content Trust (DCT)', correct: true }
     help: https://docs.docker.com/engine/security/trust/
 
   - uuid: 90f4c0f6-4bc0-4c9d-9cd1-bab401be4bb6
     question: What environment variable must be enabled to use Docker Content Trust?
     answers:
-      - { value: "DOCKER_TRUST_MODE=ENABLED", correct: false }
-      - { value: "DOCKER_CONTENT_TRUST=1", correct: true }
-      - { value: "ENABLE_IMAGE_SIGNING=true", correct: false }
-      - { value: "DCT_ENABLED=1", correct: false }
+      - { value: 'DOCKER_TRUST_MODE=ENABLED', correct: false }
+      - { value: 'DOCKER_CONTENT_TRUST=1', correct: true }
+      - { value: 'ENABLE_IMAGE_SIGNING=true', correct: false }
+      - { value: 'DCT_ENABLED=1', correct: false }
     help: https://docs.docker.com/engine/security/trust/
 
   - uuid: 71f3094d-2cf2-4cd4-84e1-b5e97cfe7a91
     question: What command is used to sign a Docker image using Docker Content Trust?
     answers:
-      - { value: "docker image verify IMAGE[:TAG]", correct: false }
-      - { value: "docker trust enable IMAGE[:TAG]", correct: false }
-      - { value: "docker image sign IMAGE[:TAG]", correct: false }
-      - { value: "docker trust sign IMAGE[:TAG]", correct: true }
+      - { value: 'docker image verify IMAGE[:TAG]', correct: false }
+      - { value: 'docker trust enable IMAGE[:TAG]', correct: false }
+      - { value: 'docker image sign IMAGE[:TAG]', correct: false }
+      - { value: 'docker trust sign IMAGE[:TAG]', correct: true }
     help: https://docs.docker.com/reference/cli/docker/trust/sign/
 
   - uuid: 91d5b8a5-c18c-4fcf-977f-4e92c1ef26cf
     question: What does enabling Docker Content Trust prevent?
     answers:
-      - { value: "Uploading image logs", correct: false }
-      - { value: "Overwriting local images", correct: false }
-      - { value: "Pulling unsigned images", correct: true }
-      - { value: "Creating multi-stage builds", correct: false }
+      - { value: 'Uploading image logs', correct: false }
+      - { value: 'Overwriting local images', correct: false }
+      - { value: 'Pulling unsigned images', correct: true }
+      - { value: 'Creating multi-stage builds', correct: false }
     help: https://docs.docker.com/engine/security/trust/
 
   - uuid: 5659ea44-4dc4-4fa6-92ef-7d2c58b9b3f4
     question: What key types are required when initializing trust on a repo using DCT?
     answers:
-      - { value: "CA key and encryption key", correct: false }
-      - { value: "Root key and repository key", correct: true }
-      - { value: "JWT key and Docker ID", correct: false }
-      - { value: "TLS key and client key", correct: false }
+      - { value: 'CA key and encryption key', correct: false }
+      - { value: 'Root key and repository key', correct: true }
+      - { value: 'JWT key and Docker ID', correct: false }
+      - { value: 'TLS key and client key', correct: false }
     help: https://docs.docker.com/engine/security/trust/trust_automation/
 
   - uuid: fce1830c-5cc4-45d6-a58f-163eecab2c15
     question: What does a Notary server store in the context of Docker image signing?
     answers:
-      - { value: "Authentication tokens", correct: false }
-      - { value: "Full image layers", correct: false }
-      - { value: "Compressed image tarballs", correct: false }
-      - { value: "Signed metadata and public keys", correct: true }
+      - { value: 'Authentication tokens', correct: false }
+      - { value: 'Full image layers', correct: false }
+      - { value: 'Compressed image tarballs', correct: false }
+      - { value: 'Signed metadata and public keys', correct: true }
     help: https://github.com/notaryproject/notary
 
   - uuid: 0a8fe539-1f53-4ed6-bb3b-680e2b7f3dbf
     question: What is a practical security benefit of using image signing?
     answers:
-      - { value: "Reduces container startup time", correct: false }
-      - { value: "Enables automatic volume mounting", correct: false }
-      - { value: "Improves image compression", correct: false }
-      - { value: "Prevents deployment of tampered or malicious images", correct: true }
+      - { value: 'Reduces container startup time', correct: false }
+      - { value: 'Enables automatic volume mounting', correct: false }
+      - { value: 'Improves image compression', correct: false }
+      - { value: 'Prevents deployment of tampered or malicious images', correct: true }
     help: https://docs.docker.com/engine/security/trust/
 
   - uuid: 611bcfa9-f4e3-465b-939b-dab7e0739a60
     question: What does the `docker trust inspect IMAGE` command show?
     answers:
-      - { value: "Layer history of an image", correct: false }
-      - { value: "Build logs of the image", correct: false }
-      - { value: "Container memory limits", correct: false }
-      - { value: "Signers and signature metadata for an image", correct: true }
+      - { value: 'Layer history of an image', correct: false }
+      - { value: 'Build logs of the image', correct: false }
+      - { value: 'Container memory limits', correct: false }
+      - { value: 'Signers and signature metadata for an image', correct: true }
     help: https://docs.docker.com/reference/cli/docker/trust/inspect/
 
   - uuid: 2a3c763f-1c1e-4bc3-a116-0fc8818a808c
     question: When using DCT, what happens if you try to pull an image without a valid signature?
     answers:
-      - { value: "The image is automatically signed locally", correct: false }
-      - { value: "The image is pulled but not run", correct: false }
-      - { value: "The image is pulled but marked as untrusted", correct: false }
-      - { value: "The pull fails with a trust error", correct: true }
+      - { value: 'The image is automatically signed locally', correct: false }
+      - { value: 'The image is pulled but not run', correct: false }
+      - { value: 'The image is pulled but marked as untrusted', correct: false }
+      - { value: 'The pull fails with a trust error', correct: true }
     help: https://docs.docker.com/engine/security/trust/
 
   - uuid: b5a8a396-2b59-4eaa-920f-8409f09e2b3b
     question: What does the `docker trust inspect` command do?
     answers:
-      - { value: "It signs an image using a trusted GPG key", correct: false }
+      - { value: 'It signs an image using a trusted GPG key', correct: false }
       - { value: "It validates the Docker daemon's TLS settings", correct: false }
-      - { value: "It displays signature metadata for a Docker image", correct: true }
-      - { value: "It encrypts layers before pushing to a registry", correct: false }
+      - { value: 'It displays signature metadata for a Docker image', correct: true }
+      - { value: 'It encrypts layers before pushing to a registry', correct: false }
     help: https://docs.docker.com/reference/cli/docker/trust/inspect/
 
   - uuid: d732cc93-f9aa-4a35-b2be-2dd3269015e2
     question: Which `docker trust` subcommand provides a human-readable view of who signed an image?
     answers:
-      - { value: "`docker trust verify`", correct: false }
-      - { value: "`docker trust view`", correct: false }
-      - { value: "`docker trust inspect --pretty`", correct: true }
-      - { value: "`docker trust show`", correct: false }
+      - { value: '`docker trust verify`', correct: false }
+      - { value: '`docker trust view`', correct: false }
+      - { value: '`docker trust inspect --pretty`', correct: true }
+      - { value: '`docker trust show`', correct: false }
     help: https://docs.docker.com/reference/cli/docker/trust/inspect/
 
 
diff --git a/data/5_Security/describe_security_administration_tasks.yaml b/data/5_Security/describe_security_administration_tasks.yaml
index 9dc6c7d..9c02b79 100644
--- a/data/5_Security/describe_security_administration_tasks.yaml
+++ b/data/5_Security/describe_security_administration_tasks.yaml
@@ -2,90 +2,90 @@ questions:
   - uuid: 52f2c3be-9987-440c-9891-b4f4fa13fbb9
     question: What is the principle of least privilege in the context of Docker containers?
     answers:
-      - { value: "Sharing host files with all containers", correct: false }
-      - { value: "Running containers with full root access", correct: false }
-      - { value: "Allowing containers to configure Docker itself", correct: false }
-      - { value: "Giving containers only the permissions they need to function", correct: true }
+      - { value: 'Sharing host files with all containers', correct: false }
+      - { value: 'Running containers with full root access', correct: false }
+      - { value: 'Allowing containers to configure Docker itself', correct: false }
+      - { value: 'Giving containers only the permissions they need to function', correct: true }
     help: https://docs.docker.com/engine/security/security/
 
   - uuid: b38d8947-2f6e-4a38-8c79-6355b508ec88
     question: Which Docker flag allows you to drop Linux capabilities from a container?
     answers:
-      - { value: "--privileged", correct: false }
-      - { value: "--read-only", correct: false }
-      - { value: "--security-opt", correct: false }
-      - { value: "--cap-drop", correct: true }
+      - { value: '--privileged', correct: false }
+      - { value: '--read-only', correct: false }
+      - { value: '--security-opt', correct: false }
+      - { value: '--cap-drop', correct: true }
     help: https://docs.docker.com/engine/containers/run/#runtime-privilege-and-linux-capabilities
 
   - uuid: 1c8123d2-9858-4aa6-8102-dbe0e69e6b8a
     question: What is a good practice when configuring user permissions in a Dockerfile?
     answers:
-      - { value: "Always use the root user for flexibility", correct: false }
-      - { value: "Set a non-root user with the USER instruction", correct: true }
-      - { value: "Use the host’s user account for authentication", correct: false }
-      - { value: "Change the host’s passwd file", correct: false }
+      - { value: 'Always use the root user for flexibility', correct: false }
+      - { value: 'Set a non-root user with the USER instruction', correct: true }
+      - { value: 'Use the host’s user account for authentication', correct: false }
+      - { value: 'Change the host’s passwd file', correct: false }
     help: https://docs.docker.com/develop/develop-images/dockerfile_best-practices/#user
 
   - uuid: a05de06a-dff3-4b02-9f56-045650ec2e34
     question: What does the `--read-only` flag do for a container?
     answers:
-      - { value: "Blocks access to external networks", correct: false }
-      - { value: "Makes host directories immutable", correct: false }
+      - { value: 'Blocks access to external networks', correct: false }
+      - { value: 'Makes host directories immutable', correct: false }
       - { value: "Mounts the container's root filesystem as read-only", correct: true }
-      - { value: "Disables user input", correct: false }
+      - { value: 'Disables user input', correct: false }
     help: https://docs.docker.com/engine/reference/run/#read-only
 
   - uuid: 3cd56a68-fab3-4e60-9d44-e0fc5105d5ea
     question: What is the role of AppArmor or SELinux in Docker?
     answers:
-      - { value: "They provide mandatory access control policies for containers", correct: true }
-      - { value: "They encrypt Docker images", correct: false }
-      - { value: "They manage container network drivers", correct: false }
-      - { value: "They configure systemd inside containers", correct: false }
+      - { value: 'They provide mandatory access control policies for containers', correct: true }
+      - { value: 'They encrypt Docker images', correct: false }
+      - { value: 'They manage container network drivers', correct: false }
+      - { value: 'They configure systemd inside containers', correct: false }
     help: https://docs.docker.com/engine/security/apparmor/
 
   - uuid: 00c5b64f-355e-45dc-b9a7-8b40ac9e91f3
     question: How does Docker manage secrets securely in Swarm mode?
     answers:
-      - { value: "Secrets are passed as environment variables", correct: false }
-      - { value: "Secrets are hardcoded in the image", correct: false }
-      - { value: "Secrets are stored in bind mounts", correct: false }
-      - { value: "Secrets are encrypted at rest and only exposed in-memory to relevant services", correct: true }
+      - { value: 'Secrets are passed as environment variables', correct: false }
+      - { value: 'Secrets are hardcoded in the image', correct: false }
+      - { value: 'Secrets are stored in bind mounts', correct: false }
+      - { value: 'Secrets are encrypted at rest and only exposed in-memory to relevant services', correct: true }
     help: https://docs.docker.com/engine/swarm/secrets/
 
   - uuid: 76b8d3e0-37d8-4011-a89f-57fae0840c21
     question: What is the effect of using the `--privileged` flag with `docker run`?
     answers:
-      - { value: "Isolates the container from the host", correct: false }
-      - { value: "Restricts network access", correct: false }
-      - { value: "Gives the container full access to all devices and host capabilities", correct: true }
-      - { value: "Prevents volume mounting", correct: false }
+      - { value: 'Isolates the container from the host', correct: false }
+      - { value: 'Restricts network access', correct: false }
+      - { value: 'Gives the container full access to all devices and host capabilities', correct: true }
+      - { value: 'Prevents volume mounting', correct: false }
     help: https://docs.docker.com/engine/reference/run/#runtime-privilege-and-linux-capabilities
 
   - uuid: 253eb20f-8cf4-4be6-84fd-26ef58d62f3e
     question: What is the recommended way to audit container activity?
     answers:
-      - { value: "Manually inspect file system changes", correct: false }
-      - { value: "Log everything in the container’s environment variables", correct: false }
-      - { value: "Only review the image’s Dockerfile", correct: false }
-      - { value: "Use auditd or container-aware logging solutions", correct: true }
+      - { value: 'Manually inspect file system changes', correct: false }
+      - { value: 'Log everything in the container’s environment variables', correct: false }
+      - { value: 'Only review the image’s Dockerfile', correct: false }
+      - { value: 'Use auditd or container-aware logging solutions', correct: true }
     help: https://docs.docker.com/config/containers/logging/
 
   - uuid: d3593c9d-009e-4b8c-9b1e-248fa317a3dc
     question: What security mechanism can be used to prevent a container from accessing host devices?
     answers:
-      - { value: "Expose the container with --network host", correct: false }
-      - { value: "Use a custom seccomp profile", correct: true }
-      - { value: "Mount /dev directly", correct: false }
-      - { value: "Enable experimental features", correct: false }
+      - { value: 'Expose the container with --network host', correct: false }
+      - { value: 'Use a custom seccomp profile', correct: true }
+      - { value: 'Mount /dev directly', correct: false }
+      - { value: 'Enable experimental features', correct: false }
     help: https://docs.docker.com/engine/security/seccomp/
 
   - uuid: f201b3e3-1f79-4e7e-89f4-9acfa01d8b1b
     question: In Docker Enterprise, how are access permissions typically managed?
     answers:
-      - { value: "Using Role-Based Access Control (RBAC)", correct: true }
-      - { value: "Through Unix file permissions", correct: false }
-      - { value: "Only via swarm manager tokens", correct: false }
-      - { value: "Via container labels", correct: false }
+      - { value: 'Using Role-Based Access Control (RBAC)', correct: true }
+      - { value: 'Through Unix file permissions', correct: false }
+      - { value: 'Only via swarm manager tokens', correct: false }
+      - { value: 'Via container labels', correct: false }
     help: https://docs.docker.com/ee/ucp/authorization/
 
diff --git a/data/5_Security/external_certs_ucp_dtr.yaml b/data/5_Security/external_certs_ucp_dtr.yaml
index 55cf38d..338ae14 100644
--- a/data/5_Security/external_certs_ucp_dtr.yaml
+++ b/data/5_Security/external_certs_ucp_dtr.yaml
@@ -2,80 +2,80 @@ questions:
   - uuid: b61f1b5e-d74e-432e-bc14-d1d8f58ab8c1
     question: What is the purpose of using external certificates in UCP/DTR?
     answers:
-      - { value: "Authenticate connections with certificates issued by a trusted authority", correct: true }
-      - { value: "Replace Docker Hub as the image source", correct: false }
-      - { value: "Speed up transfers between nodes", correct: false }
-      - { value: "Enable SSH access to containers", correct: false }
+      - { value: 'Authenticate connections with certificates issued by a trusted authority', correct: true }
+      - { value: 'Replace Docker Hub as the image source', correct: false }
+      - { value: 'Speed up transfers between nodes', correct: false }
+      - { value: 'Enable SSH access to containers', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/tls/external-ca.html
 
   - uuid: 72e2c462-56b4-44e9-9e88-9fa63129a548
     question: Which files are required to use an external certificate in UCP?
     answers:
-      - { value: "A signed image", correct: false }
-      - { value: "A server certificate, a private key, and a CA chain", correct: true }
-      - { value: "A TLS certificate and a JWT token", correct: false }
-      - { value: "A YAML configuration file", correct: false }
+      - { value: 'A signed image', correct: false }
+      - { value: 'A server certificate, a private key, and a CA chain', correct: true }
+      - { value: 'A TLS certificate and a JWT token', correct: false }
+      - { value: 'A YAML configuration file', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/tls/external-ca.html#prerequisites
 
   - uuid: 61c27520-172b-457f-8727-b709c4f81b99
     question: Which command is used to replace existing UCP certificates?
     answers:
-      - { value: "docker swarm tls renew", correct: false }
-      - { value: "docker container run --rm -v $(pwd):/certs docker/ucp replace-certs", correct: true }
-      - { value: "docker tls apply", correct: false }
-      - { value: "docker ucp certs import", correct: false }
+      - { value: 'docker swarm tls renew', correct: false }
+      - { value: 'docker container run --rm -v $(pwd):/certs docker/ucp replace-certs', correct: true }
+      - { value: 'docker tls apply', correct: false }
+      - { value: 'docker ucp certs import', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/tls/rotate-ca.html
 
   - uuid: 2833a6f3-d478-48c3-874b-8f47dc59a1fa
     question: Which command configures DTR with an external CA after installation?
     answers:
-      - { value: "docker container exec dtr set-cert", correct: false }
-      - { value: "docker dtr certs reload", correct: false }
-      - { value: "docker registry update-cert", correct: false }
-      - { value: "docker run -it docker/dtr reconfigure --external-ca", correct: true }
+      - { value: 'docker container exec dtr set-cert', correct: false }
+      - { value: 'docker dtr certs reload', correct: false }
+      - { value: 'docker registry update-cert', correct: false }
+      - { value: 'docker run -it docker/dtr reconfigure --external-ca', correct: true }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/dtr/install/use-external-ca.html
 
   - uuid: 3c0d3b9e-77e2-4ef9-bf2f-b607c12666da
     question: At what point can external certificates be provided during UCP installation?
     answers:
-      - { value: "Directly with the --external-server-cert option", correct: true }
-      - { value: "By modifying the UCP Dockerfile", correct: false }
-      - { value: "By copying files into /etc/ssl", correct: false }
-      - { value: "Only after installation", correct: false }
+      - { value: 'Directly with the --external-server-cert option', correct: true }
+      - { value: 'By modifying the UCP Dockerfile', correct: false }
+      - { value: 'By copying files into /etc/ssl', correct: false }
+      - { value: 'Only after installation', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/tls/external-ca.html#during-installation
 
   - uuid: 9c88f204-cb01-49b1-9c14-1202b765d08a
     question: What happens if UCP certificates expire and are not renewed in time?
     answers:
-      - { value: "Swarm is automatically recreated", correct: false }
-      - { value: "Containers are deleted", correct: false }
-      - { value: "The UCP dashboard becomes inaccessible over HTTPS", correct: true }
-      - { value: "DTR switches to read-only mode", correct: false }
+      - { value: 'Swarm is automatically recreated', correct: false }
+      - { value: 'Containers are deleted', correct: false }
+      - { value: 'The UCP dashboard becomes inaccessible over HTTPS', correct: true }
+      - { value: 'DTR switches to read-only mode', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/tls/rotate-ca.html
 
   - uuid: 6ac7dc55-ff07-4190-aed5-10c8ef730ec8
     question: Why is it important to provide the full certificate chain (CA bundle)?
     answers:
-      - { value: "To connect to Docker Hub", correct: false }
-      - { value: "So clients can validate the entire chain of trust up to the root CA", correct: true }
-      - { value: "To enable UCP clustering", correct: false }
-      - { value: "To enable persistent volumes", correct: false }
+      - { value: 'To connect to Docker Hub', correct: false }
+      - { value: 'So clients can validate the entire chain of trust up to the root CA', correct: true }
+      - { value: 'To enable UCP clustering', correct: false }
+      - { value: 'To enable persistent volumes', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/tls/external-ca.html#prerequisites
 
   - uuid: 4d9e2259-c0d5-4062-91b5-0a3dbbeffcb8
     question: Can DTR TLS certificates be replaced without downtime?
     answers:
-      - { value: "Yes, using reconfigure in rolling mode", correct: true }
-      - { value: "No, DTR must be reinstalled", correct: false }
-      - { value: "Yes, but only with Docker Desktop", correct: false }
-      - { value: "No, because certificates are immutable", correct: false }
+      - { value: 'Yes, using reconfigure in rolling mode', correct: true }
+      - { value: 'No, DTR must be reinstalled', correct: false }
+      - { value: 'Yes, but only with Docker Desktop', correct: false }
+      - { value: 'No, because certificates are immutable', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/dtr/install/use-external-ca.html#replace-existing-certificates
 
   - uuid: b7d019c6-7c9b-464c-ae0e-ec64927a0149
     question: What format must the certificates and keys provided to UCP/DTR follow?
     answers:
-      - { value: "PEM (base64 encoded)", correct: true }
-      - { value: "PKCS#11 token", correct: false }
-      - { value: "PFX (Windows format)", correct: false }
-      - { value: "DER (raw binary)", correct: false }
+      - { value: 'PEM (base64 encoded)', correct: true }
+      - { value: 'PKCS#11 token', correct: false }
+      - { value: 'PFX (Windows format)', correct: false }
+      - { value: 'DER (raw binary)', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/tls/external-ca.html
diff --git a/data/5_Security/image_security_scan.yaml b/data/5_Security/image_security_scan.yaml
index 4ca6f36..8ec4eb3 100644
--- a/data/5_Security/image_security_scan.yaml
+++ b/data/5_Security/image_security_scan.yaml
@@ -2,80 +2,80 @@ questions:
   - uuid: b36df24b-b1b6-47a2-b8c1-4d0b4c98f689
     question: Which platform in Docker Enterprise allows scanning images for vulnerabilities?
     answers:
-      - { value: "UCP (Universal Control Plane)", correct: false }
-      - { value: "Docker Hub", correct: false }
-      - { value: "DTR (Docker Trusted Registry)", correct: true }
-      - { value: "Docker CLI", correct: false }
+      - { value: 'UCP (Universal Control Plane)', correct: false }
+      - { value: 'Docker Hub', correct: false }
+      - { value: 'DTR (Docker Trusted Registry)', correct: true }
+      - { value: 'Docker CLI', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/dtr/security/scan-images.html
 
   - uuid: 3d30c8d6-bfcb-4bb5-b066-0b31633c7a2b
     question: When is a security scan triggered on an image in DTR?
     answers:
-      - { value: "Only manually from the UI", correct: false }
-      - { value: "Immediately after the image is pushed", correct: true }
-      - { value: "When building the image with a Dockerfile", correct: false }
-      - { value: "Every 24 hours automatically", correct: false }
+      - { value: 'Only manually from the UI', correct: false }
+      - { value: 'Immediately after the image is pushed', correct: true }
+      - { value: 'When building the image with a Dockerfile', correct: false }
+      - { value: 'Every 24 hours automatically', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/dtr/security/scan-images.html#image-scanning-flow
 
   - uuid: 6e5297cf-98c5-4978-a5a2-d9b87f119038
     question: Which status in DTR indicates that an image has no critical vulnerabilities?
     answers:
-      - { value: "ScanPending", correct: false }
-      - { value: "Pass", correct: true }
-      - { value: "Vulnerable", correct: false }
-      - { value: "Warning", correct: false }
+      - { value: 'ScanPending', correct: false }
+      - { value: 'Pass', correct: true }
+      - { value: 'Vulnerable', correct: false }
+      - { value: 'Warning', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/dtr/security/scan-images.html#scan-results
 
   - uuid: 51bd227f-7df8-48b4-8f90-1e88100cf037
     question: Where can the security results of an image be viewed in DTR?
     answers:
-      - { value: "In the DTR web interface under the specific image", correct: true }
-      - { value: "In the Swarm configuration", correct: false }
-      - { value: "On Docker Hub in the Security tab", correct: false }
-      - { value: "Using docker scan <image>", correct: false }
+      - { value: 'In the DTR web interface under the specific image', correct: true }
+      - { value: 'In the Swarm configuration', correct: false }
+      - { value: 'On Docker Hub in the Security tab', correct: false }
+      - { value: 'Using docker scan <image>', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/dtr/security/scan-images.html#scan-results
 
   - uuid: 4a4210c4-93dc-49f2-a00e-204660a0ccba
     question: What type of vulnerabilities are detected by the DTR scanner?
     answers:
-      - { value: "Dockerfile syntax errors", correct: false }
-      - { value: "Flaws in volumes", correct: false }
-      - { value: "Secrets leaks in logs", correct: false }
-      - { value: "CVE (Common Vulnerabilities and Exposures)", correct: true }
+      - { value: 'Dockerfile syntax errors', correct: false }
+      - { value: 'Flaws in volumes', correct: false }
+      - { value: 'Secrets leaks in logs', correct: false }
+      - { value: 'CVE (Common Vulnerabilities and Exposures)', correct: true }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/dtr/security/scan-images.html#image-scanning-flow
 
   - uuid: 93143c7e-6826-43e2-bc70-39f390e99c3e
     question: What is a good practice after detecting a critical CVE in an image?
     answers:
-      - { value: "Unpublish the image from the registry", correct: false }
-      - { value: "Ignore the alert if the container works", correct: false }
-      - { value: "Update packages and rebuild the image", correct: true }
-      - { value: "Switch to another registry", correct: false }
+      - { value: 'Unpublish the image from the registry', correct: false }
+      - { value: 'Ignore the alert if the container works', correct: false }
+      - { value: 'Update packages and rebuild the image', correct: true }
+      - { value: 'Switch to another registry', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/dtr/security/scan-images.html#mitigate
 
   - uuid: 6c85d1e5-0106-4b0b-88b5-fd4079cfa01f
     question: Is it possible to block the execution of vulnerable images using rules?
     answers:
-      - { value: "No, Docker does not offer this level of security", correct: false }
-      - { value: "Yes, with admission rules in UCP", correct: true }
-      - { value: "Yes, but only on Docker Desktop", correct: false }
-      - { value: "Yes, but only via Docker Hub Pro", correct: false }
+      - { value: 'No, Docker does not offer this level of security', correct: false }
+      - { value: 'Yes, with admission rules in UCP', correct: true }
+      - { value: 'Yes, but only on Docker Desktop', correct: false }
+      - { value: 'Yes, but only via Docker Hub Pro', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/rbac/admission-control.html
 
   - uuid: a7e14311-5b38-4dd3-bf88-76d881e5e5bc
     question: What vulnerability source is used by the DTR scanner?
     answers:
-      - { value: "The NIST CVE (National Vulnerability Database)", correct: true }
-      - { value: "Dockerfile linting", correct: false }
-      - { value: "Custom user-defined rules", correct: false }
-      - { value: "Logs of previous images", correct: false }
+      - { value: 'The NIST CVE (National Vulnerability Database)', correct: true }
+      - { value: 'Dockerfile linting', correct: false }
+      - { value: 'Custom user-defined rules', correct: false }
+      - { value: 'Logs of previous images', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/dtr/security/scan-images.html#scanner
 
   - uuid: 4dd21887-b9a0-41ae-b39e-0ef360f3c264
     question: What does the “ScanPending” status mean for an image in DTR?
     answers:
-      - { value: "No issues detected", correct: false }
-      - { value: "The scan is running or scheduled but not yet complete", correct: true }
-      - { value: "Invalid image", correct: false }
-      - { value: "Scan disabled", correct: false }
+      - { value: 'No issues detected', correct: false }
+      - { value: 'The scan is running or scheduled but not yet complete', correct: true }
+      - { value: 'Invalid image', correct: false }
+      - { value: 'Scan disabled', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/dtr/security/scan-images.html#scan-results
diff --git a/data/5_Security/security_identity_roles.yaml b/data/5_Security/security_identity_roles.yaml
index b7d65b6..439bad5 100644
--- a/data/5_Security/security_identity_roles.yaml
+++ b/data/5_Security/security_identity_roles.yaml
@@ -2,80 +2,80 @@ questions:
   - uuid: 3aeb8d79-c346-4f29-95c7-3245ac9c7cb6
     question: In UCP, what does RBAC stand for?
     answers:
-      - { value: "Role-Based Access Control", correct: true }
-      - { value: "Registry-Based Access Control", correct: false }
-      - { value: "Read-Based Access Certification", correct: false }
-      - { value: "Resource Binding and ACL Configuration", correct: false }
+      - { value: 'Role-Based Access Control', correct: true }
+      - { value: 'Registry-Based Access Control', correct: false }
+      - { value: 'Read-Based Access Certification', correct: false }
+      - { value: 'Resource Binding and ACL Configuration', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/rbac/
 
   - uuid: 6f0a6a9e-3e91-472c-bd1c-8bdf1b179c92
     question: Which built-in RBAC role grants read-only access to UCP resources?
     answers:
-      - { value: "ViewOnly", correct: true }
-      - { value: "AuditRead", correct: false }
-      - { value: "FullControl", correct: false }
-      - { value: "RestrictedControl", correct: false }
+      - { value: 'ViewOnly', correct: true }
+      - { value: 'AuditRead', correct: false }
+      - { value: 'FullControl', correct: false }
+      - { value: 'RestrictedControl', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/rbac/default-roles.html
 
   - uuid: 2fa7f0a6-3c4d-4f9c-9b7e-0871a5393b82
     question: Which role allows a user to restart a service without modifying its content?
     answers:
-      - { value: "FullControl", correct: false }
-      - { value: "RestrictedControl", correct: true }
-      - { value: "ViewOnly", correct: false }
-      - { value: "AdminOnly", correct: false }
+      - { value: 'FullControl', correct: false }
+      - { value: 'RestrictedControl', correct: true }
+      - { value: 'ViewOnly', correct: false }
+      - { value: 'AdminOnly', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/rbac/default-roles.html
 
   - uuid: 4b4ff307-79f0-4e5a-8c87-0ae4b21b1ef4
     question: Which UCP role grants full access to resource actions?
     answers:
-      - { value: "Operator", correct: false }
-      - { value: "RestrictedControl", correct: false }
-      - { value: "ReadWrite", correct: false }
-      - { value: "FullControl", correct: true }
+      - { value: 'Operator', correct: false }
+      - { value: 'RestrictedControl', correct: false }
+      - { value: 'ReadWrite', correct: false }
+      - { value: 'FullControl', correct: true }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/rbac/default-roles.html
 
   - uuid: 34781fc8-f57b-48e2-9b0e-4f2bbd54f5da
     question: Which entity can be assigned an RBAC role in UCP?
     answers:
-      - { value: "A container", correct: false }
-      - { value: "A volume", correct: false }
-      - { value: "A user or a team", correct: true }
-      - { value: "A registry", correct: false }
+      - { value: 'A container', correct: false }
+      - { value: 'A volume', correct: false }
+      - { value: 'A user or a team', correct: true }
+      - { value: 'A registry', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/rbac/manage-access.html
 
   - uuid: 05818c2f-b3c5-4dbb-939f-0ad5f98112c1
     question: What does the scope of a role in UCP define?
     answers:
-      - { value: "The number of allowed actions", correct: false }
-      - { value: "The priority level of the role", correct: false }
-      - { value: "The access expiration time", correct: false }
-      - { value: "The types of resources the role applies to", correct: true }
+      - { value: 'The number of allowed actions', correct: false }
+      - { value: 'The priority level of the role', correct: false }
+      - { value: 'The access expiration time', correct: false }
+      - { value: 'The types of resources the role applies to', correct: true }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/rbac/
 
   - uuid: 5b3ffcbf-13c5-4e01-b282-601e3a8ce1d3
     question: Which role is most appropriate for a read-only user on a namespace?
     answers:
-      - { value: "NamespaceReader", correct: false }
-      - { value: "ViewOnly", correct: true }
-      - { value: "Audit", correct: false }
-      - { value: "RestrictedControl", correct: false }
+      - { value: 'NamespaceReader', correct: false }
+      - { value: 'ViewOnly', correct: true }
+      - { value: 'Audit', correct: false }
+      - { value: 'RestrictedControl', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/rbac/use-cases.html
 
   - uuid: 2c5f55b4-83ef-4040-b7c8-1822b0cdad73
     question: What is a best practice to simplify role management?
     answers:
-      - { value: "Assign roles to teams rather than individual users", correct: true }
-      - { value: "Create one role per service", correct: false }
-      - { value: "Avoid using built-in roles", correct: false }
-      - { value: "Give FullControl to everyone", correct: false }
+      - { value: 'Assign roles to teams rather than individual users', correct: true }
+      - { value: 'Create one role per service', correct: false }
+      - { value: 'Avoid using built-in roles', correct: false }
+      - { value: 'Give FullControl to everyone', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/rbac/manage-access.html
 
   - uuid: 5a84f5f6-69ca-466b-80f2-d259fd387623
     question: Which action is allowed by the `RestrictedControl` role but not by `ViewOnly`?
     answers:
-      - { value: "List volumes", correct: false }
-      - { value: "Restart a container", correct: true }
-      - { value: "Read service logs", correct: false }
-      - { value: "View cluster status", correct: false }
+      - { value: 'List volumes', correct: false }
+      - { value: 'Restart a container', correct: true }
+      - { value: 'Read service logs', correct: false }
+      - { value: 'View cluster status', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/rbac/default-roles.html
diff --git a/data/5_Security/swarm_default_security.yaml b/data/5_Security/swarm_default_security.yaml
index ff6dd90..af2b7e4 100644
--- a/data/5_Security/swarm_default_security.yaml
+++ b/data/5_Security/swarm_default_security.yaml
@@ -2,71 +2,71 @@ questions:
   - uuid: 1d85043d-622a-4ff7-bdbb-6a9d20790a4e
     question: What type of security is enabled by default in Docker Swarm mode?
     answers:
-      - { value: "GPG encryption of container images", correct: false }
-      - { value: "SSH tunnels for node communication", correct: false }
-      - { value: "Open authentication with tokens", correct: false }
-      - { value: "Mutual TLS (mTLS) between nodes", correct: true }
+      - { value: 'GPG encryption of container images', correct: false }
+      - { value: 'SSH tunnels for node communication', correct: false }
+      - { value: 'Open authentication with tokens', correct: false }
+      - { value: 'Mutual TLS (mTLS) between nodes', correct: true }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/pki/
 
   - uuid: 98f53903-8bc4-4689-99bb-729b0b217c1c
     question: What is the role of certificates in Docker Swarm?
     answers:
-      - { value: "They authenticate and encrypt communication between nodes", correct: true }
+      - { value: 'They authenticate and encrypt communication between nodes', correct: true }
       - { value: "They store the container's configuration", correct: false }
-      - { value: "They are used for publishing images", correct: false }
-      - { value: "They replace container secrets", correct: false }
+      - { value: 'They are used for publishing images', correct: false }
+      - { value: 'They replace container secrets', correct: false }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/pki/
 
   - uuid: 3ef672a6-236f-4f7e-914c-b3c3cc626295
     question: What happens when a worker joins a Swarm cluster?
     answers:
-      - { value: "It is issued a certificate signed by the Swarm CA", correct: true }
+      - { value: 'It is issued a certificate signed by the Swarm CA', correct: true }
       - { value: "It inherits the manager's privileges", correct: false }
-      - { value: "It generates its own self-signed certificate", correct: false }
-      - { value: "It does not require authentication", correct: false }
+      - { value: 'It generates its own self-signed certificate', correct: false }
+      - { value: 'It does not require authentication', correct: false }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/pki/
 
   - uuid: 66b4b6e5-f739-4936-98f1-9b9d9b294b5d
     question: What type of encryption is used for control plane traffic in Docker Swarm?
     answers:
-      - { value: "AES-128", correct: false }
-      - { value: "Mutual TLS", correct: true }
-      - { value: "JWT Tokens", correct: false }
-      - { value: "SHA-256", correct: false }
+      - { value: 'AES-128', correct: false }
+      - { value: 'Mutual TLS', correct: true }
+      - { value: 'JWT Tokens', correct: false }
+      - { value: 'SHA-256', correct: false }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/pki/
 
   - uuid: 4ac92b8d-b5b1-4b5b-9378-5d3654c89794
     question: Can node certificates in a Swarm cluster expire?
     answers:
-      - { value: "No, once issued they last forever", correct: false }
-      - { value: "Only revoked tokens cause expiration", correct: false }
-      - { value: "Yes, they have a configurable expiration and are automatically renewed", correct: true }
-      - { value: "Only manager node certificates expire", correct: false }
+      - { value: 'No, once issued they last forever', correct: false }
+      - { value: 'Only revoked tokens cause expiration', correct: false }
+      - { value: 'Yes, they have a configurable expiration and are automatically renewed', correct: true }
+      - { value: 'Only manager node certificates expire', correct: false }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/pki/
 
   - uuid: e1b4a932-2f2b-446e-a1e4-fc1e3c1d25ff
     question: Which security feature ensures only authorized nodes can join a Swarm cluster?
     answers:
-      - { value: "Join tokens with automatic rotation", correct: true }
-      - { value: "Docker Content Trust", correct: false }
-      - { value: "UCP RBAC policies", correct: false }
-      - { value: "Firewalls on overlay networks", correct: false }
+      - { value: 'Join tokens with automatic rotation', correct: true }
+      - { value: 'Docker Content Trust', correct: false }
+      - { value: 'UCP RBAC policies', correct: false }
+      - { value: 'Firewalls on overlay networks', correct: false }
     help: https://docs.docker.com/engine/swarm/swarm_manager_locking/#join-tokens
 
   - uuid: f6d2a9e6-bbe3-4f6a-90eb-0b91c4a3eec5
     question: What happens if the Swarm root certificate authority (CA) is compromised?
     answers:
-      - { value: "Only worker nodes are affected", correct: false }
-      - { value: "The ingress network stops functioning", correct: false }
-      - { value: "All node certificates must be rotated", correct: true }
-      - { value: "The Swarm cluster auto-recovers", correct: false }
+      - { value: 'Only worker nodes are affected', correct: false }
+      - { value: 'The ingress network stops functioning', correct: false }
+      - { value: 'All node certificates must be rotated', correct: true }
+      - { value: 'The Swarm cluster auto-recovers', correct: false }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/pki/
 
   - uuid: 12d74de5-d6d2-4a88-9e9b-20f9ab76efbe
     question: How is the trust between nodes enforced in a Docker Swarm cluster?
     answers:
-      - { value: "Through a central OAuth provider", correct: false }
-      - { value: "Using certificates signed by the Swarm CA", correct: true }
-      - { value: "Via Kubernetes secrets", correct: false }
-      - { value: "With password-based authentication", correct: false }
+      - { value: 'Through a central OAuth provider', correct: false }
+      - { value: 'Using certificates signed by the Swarm CA', correct: true }
+      - { value: 'Via Kubernetes secrets', correct: false }
+      - { value: 'With password-based authentication', correct: false }
     help: https://docs.docker.com/engine/swarm/how-swarm-mode-works/pki/
diff --git a/data/5_Security/ucp_client_bundle.yaml b/data/5_Security/ucp_client_bundle.yaml
index aeedcbe..b49f353 100644
--- a/data/5_Security/ucp_client_bundle.yaml
+++ b/data/5_Security/ucp_client_bundle.yaml
@@ -2,71 +2,71 @@ questions:
   - uuid: 2b30bb2a-07de-44ae-835c-6b9117ab05f9
     question: What is the primary purpose of a UCP client bundle?
     answers:
-      - { value: "Connect DTR to Docker Hub", correct: false }
-      - { value: "Back up Docker volumes", correct: false }
-      - { value: "Allow a user to connect to UCP via the Docker CLI with secure authentication", correct: true }
-      - { value: "Deploy a new UCP instance", correct: false }
+      - { value: 'Connect DTR to Docker Hub', correct: false }
+      - { value: 'Back up Docker volumes', correct: false }
+      - { value: 'Allow a user to connect to UCP via the Docker CLI with secure authentication', correct: true }
+      - { value: 'Deploy a new UCP instance', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/user-access/create-client-bundle.html
 
   - uuid: a7c3c109-2b07-44b4-8418-7d171fc6fe95
     question: What does a UCP client bundle contain?
     answers:
-      - { value: "TLS certificates and Docker CLI configuration", correct: true }
-      - { value: "Log history", correct: false }
-      - { value: "Kubernetes manifests", correct: false }
-      - { value: "Docker images and volumes", correct: false }
+      - { value: 'TLS certificates and Docker CLI configuration', correct: true }
+      - { value: 'Log history', correct: false }
+      - { value: 'Kubernetes manifests', correct: false }
+      - { value: 'Docker images and volumes', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/user-access/create-client-bundle.html#bundle-contents
 
   - uuid: 2f9eb6c5-921a-4d7d-8c39-0a6c0152c4f1
     question: Which command generates a client bundle via the CLI?
     answers:
-      - { value: "curl -k -u USERNAME 'https://UCP_URL/api/clientbundle' > bundle.zip", correct: true }
-      - { value: "docker config export --tls", correct: false }
-      - { value: "docker ucp bundle create", correct: false }
-      - { value: "docker login --generate-bundle", correct: false }
+      - { value: 'curl -k -u USERNAME "https://UCP_URL/api/clientbundle" > bundle.zip', correct: true }
+      - { value: 'docker config export --tls', correct: false }
+      - { value: 'docker ucp bundle create', correct: false }
+      - { value: 'docker login --generate-bundle', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/user-access/create-client-bundle.html#download-using-api
 
   - uuid: 8b43a4a4-037a-4cf1-a9f1-0b92e6f51034
     question: Which script inside the client bundle automatically configures the Docker CLI?
     answers:
-      - { value: "setup-client.sh", correct: false }
-      - { value: "env.sh", correct: true }
-      - { value: "bundle-init.sh", correct: false }
-      - { value: "docker.rc", correct: false }
+      - { value: 'setup-client.sh', correct: false }
+      - { value: 'env.sh', correct: true }
+      - { value: 'bundle-init.sh', correct: false }
+      - { value: 'docker.rc', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/user-access/create-client-bundle.html#use-client-bundle
 
   - uuid: 3d7e91bc-6c87-4474-80f2-155fddbc1732
     question: What is a correct way to use a client bundle with the Docker CLI?
     answers:
-      - { value: "docker run bundle.zip", correct: false }
-      - { value: "eval $(cat bundle.config)", correct: false }
-      - { value: "source env.sh", correct: true }
-      - { value: "docker login --tls", correct: false }
+      - { value: 'docker run bundle.zip', correct: false }
+      - { value: 'eval $(cat bundle.config)', correct: false }
+      - { value: 'source env.sh', correct: true }
+      - { value: 'docker login --tls', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/user-access/create-client-bundle.html#use-client-bundle
 
   - uuid: 74e6e693-d376-486e-8d9e-79d60ce0bb0a
     question: What condition must be met for a UCP user to download their client bundle?
     answers:
-      - { value: "Have access to DTR", correct: false }
-      - { value: "Be logged in as root", correct: false }
-      - { value: "Be a member of the Admin team only", correct: false }
-      - { value: "Have the 'Generate Client Bundle' permission in their UCP role", correct: true }
+      - { value: 'Have access to DTR', correct: false }
+      - { value: 'Be logged in as root', correct: false }
+      - { value: 'Be a member of the Admin team only', correct: false }
+      - { value: 'Have the `Generate Client Bundle` permission in their UCP role', correct: true }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/user-access/create-client-bundle.html#access-control
 
   - uuid: 2ea49720-6b0d-4391-b5f7-24fae88a07d5
     question: Why is it discouraged to share a client bundle between users?
     answers:
-      - { value: "Because it blocks port 443", correct: false }
-      - { value: "Because it contains private certificates and keys specific to a user", correct: true }
-      - { value: "Because it expires every 2 minutes", correct: false }
-      - { value: "Because it contains the UCP image", correct: false }
+      - { value: 'Because it blocks port 443', correct: false }
+      - { value: 'Because it contains private certificates and keys specific to a user', correct: true }
+      - { value: 'Because it expires every 2 minutes', correct: false }
+      - { value: 'Because it contains the UCP image', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/user-access/create-client-bundle.html#security
 
   - uuid: c9390103-5a79-4a50-92d8-9a2b17804287
     question: Can the client bundle be used on a different machine than the one it was generated on?
     answers:
-      - { value: "Yes, as long as the files are copied and the certificates are still valid", correct: true }
-      - { value: "No, it is tied to the machine’s hash", correct: false }
-      - { value: "Only with an Admin account", correct: false }
-      - { value: "Only if the machine is on the same network", correct: false }
+      - { value: 'Yes, as long as the files are copied and the certificates are still valid', correct: true }
+      - { value: 'No, it is tied to the machine’s hash', correct: false }
+      - { value: 'Only with an Admin account', correct: false }
+      - { value: 'Only if the machine is on the same network', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/user-access/create-client-bundle.html#security
diff --git a/data/5_Security/ucp_ldap_ad_integration.yaml b/data/5_Security/ucp_ldap_ad_integration.yaml
index ed0e03f..98d5513 100644
--- a/data/5_Security/ucp_ldap_ad_integration.yaml
+++ b/data/5_Security/ucp_ldap_ad_integration.yaml
@@ -2,62 +2,62 @@ questions:
   - uuid: 15717e2b-bb77-46b7-b2aa-659e34d82a50
     question: What is the main purpose of integrating UCP with LDAP or Active Directory?
     answers:
-      - { value: "Speed up image transfers", correct: false }
-      - { value: "Enable centralized user authentication", correct: true }
-      - { value: "Enable Swarm mode", correct: false }
-      - { value: "Enable encrypted volumes", correct: false }
+      - { value: 'Speed up image transfers', correct: false }
+      - { value: 'Enable centralized user authentication', correct: true }
+      - { value: 'Enable Swarm mode', correct: false }
+      - { value: 'Enable encrypted volumes', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/idmgmt/external-auth/index.html
 
   - uuid: 3a90c8f2-7f4d-4608-8e6d-bf1327384d3c
     question: Which UCP option allows mapping LDAP groups to teams?
     answers:
-      - { value: "Federated Login Sync", correct: false }
-      - { value: "RBAC Sync", correct: false }
-      - { value: "LDAP-to-RBAC Hook", correct: false }
-      - { value: "Group Mapping", correct: true }
+      - { value: 'Federated Login Sync', correct: false }
+      - { value: 'RBAC Sync', correct: false }
+      - { value: 'LDAP-to-RBAC Hook', correct: false }
+      - { value: 'Group Mapping', correct: true }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/idmgmt/external-auth/group-mapping.html
 
   - uuid: 9497f5b9-b2e8-4c6f-a49e-4370c7427161
     question: Which field must be configured to identify users in LDAP?
     answers:
-      - { value: "Bind DN", correct: false }
-      - { value: "TLS Certificate Path", correct: false }
-      - { value: "User Search Filter", correct: true }
-      - { value: "Sync Token", correct: false }
+      - { value: 'Bind DN', correct: false }
+      - { value: 'TLS Certificate Path', correct: false }
+      - { value: 'User Search Filter', correct: true }
+      - { value: 'Sync Token', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/idmgmt/external-auth/index.html#required-settings
 
   - uuid: 14f7ac14-41f4-41ec-b2a0-47d8eb0ff705
     question: Which interface allows configuring LDAP in UCP?
     answers:
-      - { value: "/etc/docker/ucp-ldap.conf file", correct: false }
-      - { value: "Web Admin interface or UCP API", correct: true }
-      - { value: "docker config set --ldap", correct: false }
-      - { value: "kubectl CLI", correct: false }
+      - { value: '/etc/docker/ucp-ldap.conf file', correct: false }
+      - { value: 'Web Admin interface or UCP API', correct: true }
+      - { value: 'docker config set --ldap', correct: false }
+      - { value: 'kubectl CLI', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/idmgmt/external-auth/index.html#configure-authentication
 
   - uuid: fbd028b4-832e-42cb-80b2-baa87d7353b9
     question: Which secure protocol is recommended for the connection between UCP and LDAP?
     answers:
-      - { value: "LDAPS (LDAP over SSL/TLS)", correct: true }
-      - { value: "HTTP", correct: false }
-      - { value: "SMTP", correct: false }
-      - { value: "FTP", correct: false }
+      - { value: 'LDAPS (LDAP over SSL/TLS)', correct: true }
+      - { value: 'HTTP', correct: false }
+      - { value: 'SMTP', correct: false }
+      - { value: 'FTP', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/idmgmt/external-auth/index.html#required-settings
 
   - uuid: 44a75e71-464f-44d5-b7aa-1e59e35c02a0
     question: Which field must be filled in for UCP to query the LDAP server?
     answers:
-      - { value: "Node Token", correct: false }
-      - { value: "Image Pull Secret", correct: false }
-      - { value: "Bind DN and password", correct: true }
-      - { value: "Swarm Manager IP", correct: false }
+      - { value: 'Node Token', correct: false }
+      - { value: 'Image Pull Secret', correct: false }
+      - { value: 'Bind DN and password', correct: true }
+      - { value: 'Swarm Manager IP', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/idmgmt/external-auth/index.html#required-settings
 
   - uuid: 4207e0d3-dc14-4666-b245-68e6895f10d4
     question: Once LDAP is configured, how are users added in UCP?
     answers:
-      - { value: "Manually via CSV import", correct: false }
-      - { value: "Automatically upon first successful login", correct: true }
-      - { value: "By modifying the UCP Dockerfile", correct: false }
-      - { value: "Through an external webhook", correct: false }
+      - { value: 'Manually via CSV import', correct: false }
+      - { value: 'Automatically upon first successful login', correct: true }
+      - { value: 'By modifying the UCP Dockerfile', correct: false }
+      - { value: 'Through an external webhook', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/idmgmt/external-auth/user-lifecycle.html
diff --git a/data/5_Security/ucp_rbac_config.yaml b/data/5_Security/ucp_rbac_config.yaml
index 0033cdc..150362f 100644
--- a/data/5_Security/ucp_rbac_config.yaml
+++ b/data/5_Security/ucp_rbac_config.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: 0fc6d4e7-0179-48bb-b7e8-2a391d0c57f3
     question: What does RBAC mean in the context of Docker UCP?
     answers:
-      - { value: "Role-Based Access Control", correct: true }
-      - { value: "Remote Backup Admin Console", correct: false }
-      - { value: "Read-Before-Access Confirmation", correct: false }
-      - { value: "Registry-Based Access Configuration", correct: false }
+      - { value: 'Role-Based Access Control', correct: true }
+      - { value: 'Remote Backup Admin Console', correct: false }
+      - { value: 'Read-Before-Access Confirmation', correct: false }
+      - { value: 'Registry-Based Access Configuration', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/rbac/
 
   - uuid: e271c7fd-2315-4d19-a08c-5bd614746847
     question: Which UCP component allows defining roles and permissions?
     answers:
-      - { value: "RBAC", correct: true }
-      - { value: "Compose CLI", correct: false }
-      - { value: "SwarmKit", correct: false }
-      - { value: "Registry v2", correct: false }
+      - { value: 'RBAC', correct: true }
+      - { value: 'Compose CLI', correct: false }
+      - { value: 'SwarmKit', correct: false }
+      - { value: 'Registry v2', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/rbac/
 
   - uuid: 80129f0d-e8de-4034-97b0-96178b39b2e6
     question: Which entity can be assigned an RBAC role in UCP?
     answers:
-      - { value: "A volume", correct: false }
-      - { value: "A user or a team", correct: true }
-      - { value: "A container", correct: false }
-      - { value: "A published port", correct: false }
+      - { value: 'A volume', correct: false }
+      - { value: 'A user or a team', correct: true }
+      - { value: 'A container', correct: false }
+      - { value: 'A published port', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/rbac/manage-access.html
 
   - uuid: c4c84f21-5d8d-4e1d-8ab2-0ef03c88b9b7
     question: What is the possible scope of a role in UCP?
     answers:
-      - { value: "Domain name, DNS, logs", correct: false }
-      - { value: "Service, namespace, container, node", correct: true }
-      - { value: "External registry", correct: false }
-      - { value: "Dockerfile only", correct: false }
+      - { value: 'Domain name, DNS, logs', correct: false }
+      - { value: 'Service, namespace, container, node', correct: true }
+      - { value: 'External registry', correct: false }
+      - { value: 'Dockerfile only', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/rbac/
 
   - uuid: 8e352f44-30f3-42b4-b503-4c99ec93e764
     question: Which RBAC role allows view-only access to resources in UCP?
     answers:
-      - { value: "Operator", correct: false }
-      - { value: "AdminAccess", correct: false }
-      - { value: "ViewOnly", correct: true }
-      - { value: "RestrictedControl", correct: false }
+      - { value: 'Operator', correct: false }
+      - { value: 'AdminAccess', correct: false }
+      - { value: 'ViewOnly', correct: true }
+      - { value: 'RestrictedControl', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/rbac/default-roles.html
 
   - uuid: 546b2712-0f45-4f15-bd77-731f19e3ef5a
     question: What is a best practice when configuring RBAC?
     answers:
-      - { value: "Use only custom roles", correct: false }
-      - { value: "Give FullControl by default", correct: false }
-      - { value: "Assign roles to teams rather than individual users", correct: true }
-      - { value: "Disable RBAC if not used", correct: false }
+      - { value: 'Use only custom roles', correct: false }
+      - { value: 'Give FullControl by default', correct: false }
+      - { value: 'Assign roles to teams rather than individual users', correct: true }
+      - { value: 'Disable RBAC if not used', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/rbac/manage-access.html
 
   - uuid: c1a99418-b50c-4e5a-9186-e28eb8d46f86
     question: Where can RBAC roles be managed in UCP?
     answers:
-      - { value: "In the /etc/docker/daemon.json file", correct: false }
-      - { value: "In the Dockerfile", correct: false }
-      - { value: "Only with kubectl", correct: false }
-      - { value: "In the UCP web interface or via API", correct: true }
+      - { value: 'In the /etc/docker/daemon.json file', correct: false }
+      - { value: 'In the Dockerfile', correct: false }
+      - { value: 'Only with kubectl', correct: false }
+      - { value: 'In the UCP web interface or via API', correct: true }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/rbac/manage-access.html
 
   - uuid: f4960718-c05b-4f09-85ee-2e21a3fdde2d
     question: Can custom RBAC roles be created in UCP?
     answers:
-      - { value: "Yes, but only for registries", correct: false }
-      - { value: "No, this requires Docker Hub Pro", correct: false }
-      - { value: "No, only default roles are available", correct: false }
-      - { value: "Yes, with custom permissions on defined scopes", correct: true }
+      - { value: 'Yes, but only for registries', correct: false }
+      - { value: 'No, this requires Docker Hub Pro', correct: false }
+      - { value: 'No, only default roles are available', correct: false }
+      - { value: 'Yes, with custom permissions on defined scopes', correct: true }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/rbac/custom-roles.html
 
   - uuid: a56ae8b1-7054-4c41-8461-2d89c35c4f0a
     question: Which API allows automating RBAC configuration in UCP?
     answers:
-      - { value: "UCP RBAC HTTP API", correct: true }
-      - { value: "Kubernetes RBAC CRDs", correct: false }
-      - { value: "Docker Swarm REST API", correct: false }
-      - { value: "Docker CLI scan API", correct: false }
+      - { value: 'UCP RBAC HTTP API', correct: true }
+      - { value: 'Kubernetes RBAC CRDs', correct: false }
+      - { value: 'Docker Swarm REST API', correct: false }
+      - { value: 'Docker CLI scan API', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/api/
 
   - uuid: 1093124d-1d68-4d33-b188-e72b090fb48e
     question: Which role allows restarting services without modifying them?
     answers:
-      - { value: "FullControl", correct: false }
-      - { value: "None", correct: false }
-      - { value: "ViewOnly", correct: false }
-      - { value: "RestrictedControl", correct: true }
+      - { value: 'FullControl', correct: false }
+      - { value: 'None', correct: false }
+      - { value: 'ViewOnly', correct: false }
+      - { value: 'RestrictedControl', correct: true }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/ucp/rbac/default-roles.html
diff --git a/data/6_storage_and_volumes/contrast_object.yaml b/data/6_storage_and_volumes/contrast_object.yaml
index b123b99..360ce5c 100644
--- a/data/6_storage_and_volumes/contrast_object.yaml
+++ b/data/6_storage_and_volumes/contrast_object.yaml
@@ -2,107 +2,107 @@ questions:
   - uuid: 7f18c49c-9de2-4d4b-bb7d-fc97e8ff4319
     question: What happens to a named volume when the container using it is deleted?
     answers:
-      - { value: "The volume is automatically deleted", correct: false }
-      - { value: "It is converted into a bind mount", correct: false }
-      - { value: "The volume persists until explicitly removed", correct: true }
-      - { value: "It becomes read-only", correct: false }
+      - { value: 'The volume is automatically deleted', correct: false }
+      - { value: 'It is converted into a bind mount', correct: false }
+      - { value: 'The volume persists until explicitly removed', correct: true }
+      - { value: 'It becomes read-only', correct: false }
     help: https://docs.docker.com/storage/volumes/#remove-volumes
 
   - uuid: 30e47446-9a4a-4579-bb21-d8a1d05ffb6e
     question: What happens to an anonymous volume when the container is removed?
     answers:
-      - { value: "The volume is automatically renamed into a named volume", correct: false }
-      - { value: "The volume is converted to a tmpfs mount", correct: false }
-      - { value: "The volume is kept forever", correct: false }
-      - { value: "The volume is deleted by default unless explicitly retained", correct: true }
+      - { value: 'The volume is automatically renamed into a named volume', correct: false }
+      - { value: 'The volume is converted to a tmpfs mount', correct: false }
+      - { value: 'The volume is kept forever', correct: false }
+      - { value: 'The volume is deleted by default unless explicitly retained', correct: true }
     help: https://docs.docker.com/storage/volumes/#remove-volumes
 
   - uuid: 2e4f528f-3621-409f-9304-cc0aafeb35a1
     question: Which syntax provides better readability and advanced options for mounts?
     answers:
-      - { value: "--mount", correct: true }
-      - { value: "--volume-driver", correct: false }
-      - { value: "-v", correct: false }
-      - { value: "--bind", correct: false }
+      - { value: '--mount', correct: true }
+      - { value: '--volume-driver', correct: false }
+      - { value: '-v', correct: false }
+      - { value: '--bind', correct: false }
     help: https://docs.docker.com/storage/volumes/#choose-the--v-or---mount-flag
 
   - uuid: 18d65029-36d3-4a8d-9e40-9174b43bdf26
     question: Which syntax is shorter but less explicit for mounting volumes?
     answers:
-      - { value: "--mount", correct: false }
-      - { value: "--volume", correct: false }
-      - { value: "--storage", correct: false }
-      - { value: "-v", correct: true }
+      - { value: '--mount', correct: false }
+      - { value: '--volume', correct: false }
+      - { value: '--storage', correct: false }
+      - { value: '-v', correct: true }
     help: https://docs.docker.com/storage/volumes/#choose-the--v-or---mount-flag
 
   - uuid: 633d22bb-7f56-478d-8c6b-3436b5e122d1
     question: Which mount type creates ephemeral storage that resides only in memory?
     answers:
-      - { value: "bind", correct: false }
-      - { value: "nfs", correct: false }
-      - { value: "volume", correct: false }
-      - { value: "tmpfs", correct: true }
+      - { value: 'bind', correct: false }
+      - { value: 'nfs', correct: false }
+      - { value: 'volume', correct: false }
+      - { value: 'tmpfs', correct: true }
     help: https://docs.docker.com/storage/tmpfs/
 
   - uuid: f78492bb-34ec-47cb-9d6f-9e108969ee46
     question: What happens to data stored in a tmpfs mount when the container stops?
     answers:
-      - { value: "The data is synced to the host filesystem", correct: false }
-      - { value: "The data is lost because it only exists in memory", correct: true }
-      - { value: "The data persists in /var/lib/docker/tmpfs", correct: false }
-      - { value: "The data is stored in a named volume automatically", correct: false }
+      - { value: 'The data is synced to the host filesystem', correct: false }
+      - { value: 'The data is lost because it only exists in memory', correct: true }
+      - { value: 'The data persists in /var/lib/docker/tmpfs', correct: false }
+      - { value: 'The data is stored in a named volume automatically', correct: false }
     help: https://docs.docker.com/storage/tmpfs/
 
   - uuid: 8a4cc3f1-41ac-4a2f-a7a7-80df6e174872
     question: Which mount propagation mode allows changes on one mount to be visible to others?
     answers:
-      - { value: "rshared", correct: true }
-      - { value: "exclusive", correct: false }
-      - { value: "private", correct: false }
-      - { value: "rprivate", correct: false }
+      - { value: 'rshared', correct: true }
+      - { value: 'exclusive', correct: false }
+      - { value: 'private', correct: false }
+      - { value: 'rprivate', correct: false }
     help: https://docs.docker.com/storage/bind-mounts/#configure-bind-propagation
 
   - uuid: b8a33e5b-9225-4ff9-b2c4-69f5ea793a22
     question: Which propagation mode ensures no mount events are shared with other mounts?
     answers:
-      - { value: "rshared", correct: false }
-      - { value: "bidirectional", correct: false }
-      - { value: "shared", correct: false }
-      - { value: "rprivate", correct: true }
+      - { value: 'rshared', correct: false }
+      - { value: 'bidirectional', correct: false }
+      - { value: 'shared', correct: false }
+      - { value: 'rprivate', correct: true }
     help: https://docs.docker.com/storage/bind-mounts/#configure-bind-propagation
 
   - uuid: 927c3523-5591-40cf-a50b-562fa94ed71d
     question: Which Docker volume driver is used by default?
     answers:
-      - { value: "tmpfs", correct: false }
-      - { value: "gcp", correct: false }
-      - { value: "local", correct: true }
-      - { value: "nfs", correct: false }
+      - { value: 'tmpfs', correct: false }
+      - { value: 'gcp', correct: false }
+      - { value: 'local', correct: true }
+      - { value: 'nfs', correct: false }
     help: https://docs.docker.com/storage/volumes/#driver-specific-options
 
   - uuid: 97cc1b41-7057-4a16-9f09-28edc89c301a
     question: Which cloud service provides a native volume driver for Docker?
     answers:
-      - { value: "Google Drive", correct: false }
-      - { value: "Amazon EBS", correct: true }
-      - { value: "Slack", correct: false }
-      - { value: "Dropbox", correct: false }
+      - { value: 'Google Drive', correct: false }
+      - { value: 'Amazon EBS', correct: true }
+      - { value: 'Slack', correct: false }
+      - { value: 'Dropbox', correct: false }
     help: https://docs.docker.com/engine/extend/legacy_plugins/#volume-plugins
 
   - uuid: 5439c7b2-9cb7-474d-9a60-2d4d9c18455c
     question: What is the main advantage of using bind mounts over named volumes?
     answers:
-      - { value: "Automatic backup and restore", correct: false }
-      - { value: "Cross-host portability", correct: false }
-      - { value: "Independent lifecycle from the host", correct: false }
-      - { value: "Direct access to the host filesystem", correct: true }
+      - { value: 'Automatic backup and restore', correct: false }
+      - { value: 'Cross-host portability', correct: false }
+      - { value: 'Independent lifecycle from the host', correct: false }
+      - { value: 'Direct access to the host filesystem', correct: true }
     help: https://docs.docker.com/storage/bind-mounts/
 
   - uuid: 04ee5ff9-f7d3-40e2-a27e-469ec50b7ff0
     question: What is the main advantage of using named volumes over bind mounts?
     answers:
-      - { value: "Direct mapping to /tmp", correct: false }
-      - { value: "Unlimited size", correct: false }
-      - { value: "Automatic encryption", correct: false }
-      - { value: "Managed by Docker with better portability", correct: true }
+      - { value: 'Direct mapping to /tmp', correct: false }
+      - { value: 'Unlimited size', correct: false }
+      - { value: 'Automatic encryption', correct: false }
+      - { value: 'Managed by Docker with better portability', correct: true }
     help: https://docs.docker.com/storage/volumes/
diff --git a/data/6_storage_and_volumes/describe_demonstrate_how_to_configure_devicemapper.yaml b/data/6_storage_and_volumes/describe_demonstrate_how_to_configure_devicemapper.yaml
index 67803fb..1024262 100644
--- a/data/6_storage_and_volumes/describe_demonstrate_how_to_configure_devicemapper.yaml
+++ b/data/6_storage_and_volumes/describe_demonstrate_how_to_configure_devicemapper.yaml
@@ -2,80 +2,80 @@ questions:
   - uuid: 43b0ae9e-ff77-4cc3-96dc-b7988e6949ed
     question: What is the devicemapper storage driver primarily used for in Docker?
     answers:
-      - { value: "Managing block-level storage using device-mapped thin provisioning", correct: true }
-      - { value: "Mapping containers to specific network interfaces", correct: false }
-      - { value: "Compressing Docker images for faster pull", correct: false }
-      - { value: "Encrypting volumes at runtime", correct: false }
+      - { value: 'Managing block-level storage using device-mapped thin provisioning', correct: true }
+      - { value: 'Mapping containers to specific network interfaces', correct: false }
+      - { value: 'Compressing Docker images for faster pull', correct: false }
+      - { value: 'Encrypting volumes at runtime', correct: false }
     help: https://docs.docker.com/storage/storagedriver/device-mapper-driver/
 
   - uuid: ef79a161-b4fc-4971-b0e4-daddbce4ad46
     question: Which two devicemapper modes are available in Docker?
     answers:
-      - { value: "Thin mode and Thick mode", correct: false }
-      - { value: "RAID and JBOD", correct: false }
-      - { value: "Loop-lvm mode and Direct-lvm mode", correct: true }
-      - { value: "Direct-io and Cached mode", correct: false }
+      - { value: 'Thin mode and Thick mode', correct: false }
+      - { value: 'RAID and JBOD', correct: false }
+      - { value: 'Loop-lvm mode and Direct-lvm mode', correct: true }
+      - { value: 'Direct-io and Cached mode', correct: false }
     help: https://docs.docker.com/storage/storagedriver/device-mapper-driver/#modes
 
   - uuid: 0d5f3f8c-5c31-4b44-a479-0ce07fc79244
     question: Why is direct-lvm mode preferred over loop-lvm mode for devicemapper?
     answers:
-      - { value: "It offers better performance and is suitable for production", correct: true }
-      - { value: "It supports encrypted volumes by default", correct: false }
+      - { value: 'It offers better performance and is suitable for production', correct: true }
+      - { value: 'It supports encrypted volumes by default', correct: false }
       - { value: "It doesn't require a restart of the Docker daemon", correct: false }
-      - { value: "It uses less disk space", correct: false }
+      - { value: 'It uses less disk space', correct: false }
     help: https://docs.docker.com/storage/storagedriver/device-mapper-driver/#modes
 
   - uuid: 9ff98ff7-f9b5-4e95-89db-4f9f18012b6c
     question: What must be done before enabling direct-lvm mode on a fresh Docker installation?
     answers:
-      - { value: "Provision dedicated block devices and configure them in /etc/docker/daemon.json", correct: true }
-      - { value: "Install the thin-pool kernel module", correct: false }
-      - { value: "Enable overlayfs manually", correct: false }
-      - { value: "Format the root filesystem with ext3", correct: false }
+      - { value: 'Provision dedicated block devices and configure them in /etc/docker/daemon.json', correct: true }
+      - { value: 'Install the thin-pool kernel module', correct: false }
+      - { value: 'Enable overlayfs manually', correct: false }
+      - { value: 'Format the root filesystem with ext3', correct: false }
     help: https://docs.docker.com/storage/storagedriver/device-mapper-driver/#configure-direct-lvm-mode-for-production
 
   - uuid: 7f67e4b7-c7b3-4818-9888-d8a357b04e63
     question: Where is the devicemapper configuration typically defined in Docker?
     answers:
-      - { value: "/usr/local/docker/storage.conf", correct: false }
-      - { value: "/etc/docker/daemon.json", correct: true }
-      - { value: "/var/lib/docker/mounts", correct: false }
-      - { value: "/etc/devicemapper.conf", correct: false }
+      - { value: '/usr/local/docker/storage.conf', correct: false }
+      - { value: '/etc/docker/daemon.json', correct: true }
+      - { value: '/var/lib/docker/mounts', correct: false }
+      - { value: '/etc/devicemapper.conf', correct: false }
     help: https://docs.docker.com/storage/storagedriver/device-mapper-driver/#configure-docker-with-the-devicemapper-storage-driver
 
   - uuid: 8e408728-2f57-4c71-a789-09fd0481c598
     question: How can you verify which storage driver Docker is currently using?
     answers:
-      - { value: "docker storage inspect", correct: false }
-      - { value: "docker system storage", correct: false }
-      - { value: "docker info", correct: true }
-      - { value: "docker volume list --drivers", correct: false }
+      - { value: 'docker storage inspect', correct: false }
+      - { value: 'docker system storage', correct: false }
+      - { value: 'docker info', correct: true }
+      - { value: 'docker volume list --drivers', correct: false }
     help: https://docs.docker.com/storage/storagedriver/select-storage-driver/
 
   - uuid: 137af3b3-e1e0-4c7c-a594-b9ffb1d52fd7
     question: What is the purpose of a 'thin pool' in the context of devicemapper?
     answers:
-      - { value: "It assigns fixed storage quotas per container", correct: false }
-      - { value: "It allows efficient storage allocation by sharing space between multiple containers", correct: true }
-      - { value: "It compresses logs to reduce disk usage", correct: false }
-      - { value: "It tracks container IP addresses", correct: false }
+      - { value: 'It assigns fixed storage quotas per container', correct: false }
+      - { value: 'It allows efficient storage allocation by sharing space between multiple containers', correct: true }
+      - { value: 'It compresses logs to reduce disk usage', correct: false }
+      - { value: 'It tracks container IP addresses', correct: false }
     help: https://docs.docker.com/storage/storagedriver/device-mapper-driver/#configure-direct-lvm-mode-for-production
 
   - uuid: acd1bc16-6ae2-4c9b-8131-9bcbbd5d5a85
     question: What is a critical risk of using loop-lvm mode in production?
     answers:
-      - { value: "Poor performance and potential for running out of disk space", correct: true }
-      - { value: "Loop devices disable caching", correct: false }
-      - { value: "Containers cannot start without root privileges", correct: false }
-      - { value: "It prevents volume mounting", correct: false }
+      - { value: 'Poor performance and potential for running out of disk space', correct: true }
+      - { value: 'Loop devices disable caching', correct: false }
+      - { value: 'Containers cannot start without root privileges', correct: false }
+      - { value: 'It prevents volume mounting', correct: false }
     help: https://docs.docker.com/storage/storagedriver/device-mapper-driver/#modes
 
   - uuid: ebc457f5-4b7a-4641-80b6-b792245cb0a0
     question: Which tool is commonly used to create and manage LVM volumes for devicemapper?
     answers:
-      - { value: "mkfs.ext4", correct: false }
-      - { value: "fsck", correct: false }
-      - { value: "btrfsctl", correct: false }
-      - { value: "lvcreate", correct: true }
+      - { value: 'mkfs.ext4', correct: false }
+      - { value: 'fsck', correct: false }
+      - { value: 'btrfsctl', correct: false }
+      - { value: 'lvcreate', correct: true }
     help: https://docs.docker.com/storage/storagedriver/device-mapper-driver/#configure-direct-lvm-mode-for-production
diff --git a/data/6_storage_and_volumes/graph_drivers.yaml b/data/6_storage_and_volumes/graph_drivers.yaml
index 5213fe5..1320eed 100644
--- a/data/6_storage_and_volumes/graph_drivers.yaml
+++ b/data/6_storage_and_volumes/graph_drivers.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: 1c2f6a9a-47cb-4fa6-97c2-dcb6723af1f0
     question: What is the default and recommended storage (graph) driver for modern Linux distributions?
     answers:
-      - { value: "devicemapper", correct: false }
-      - { value: "aufs", correct: false }
-      - { value: "overlay2", correct: true }
-      - { value: "btrfs", correct: false }
+      - { value: 'devicemapper', correct: false }
+      - { value: 'aufs', correct: false }
+      - { value: 'overlay2', correct: true }
+      - { value: 'btrfs', correct: false }
     help: https://docs.docker.com/storage/storagedriver/overlayfs-driver/
 
   - uuid: 2f1e3fb7-98d1-4cbe-9bb9-973a414ac39d
     question: Which storage driver must be used on Docker Desktop for Windows?
     answers:
-      - { value: "windowsfilter", correct: true }
-      - { value: "overlay2", correct: false }
-      - { value: "zfs", correct: false }
-      - { value: "aufs", correct: false }
+      - { value: 'windowsfilter', correct: true }
+      - { value: 'overlay2', correct: false }
+      - { value: 'zfs', correct: false }
+      - { value: 'aufs', correct: false }
     help: https://docs.docker.com/engine/storage/drivers/windowsfilter-driver/
 
   - uuid: 3ad9ffb6-6b54-4f2b-b63c-8f4ed03d978c
     question: Which storage driver was historically used on Ubuntu but is now deprecated in favor of overlay2?
     answers:
-      - { value: "zfs", correct: false }
-      - { value: "windowsfilter", correct: false }
-      - { value: "btrfs", correct: false }
-      - { value: "aufs", correct: true }
+      - { value: 'zfs', correct: false }
+      - { value: 'windowsfilter', correct: false }
+      - { value: 'btrfs', correct: false }
+      - { value: 'aufs', correct: true }
     help: https://docs.docker.com/storage/storagedriver/aufs-driver/
 
   - uuid: 4fd89c32-993a-42c3-9b5f-0e10bc1183c2
     question: On which file systems is overlay2 supported?
     answers:
-      - { value: "ext4 and xfs with d_type=true", correct: true }
-      - { value: "NTFS and FAT32", correct: false }
-      - { value: "zfs only", correct: false }
-      - { value: "btrfs only", correct: false }
+      - { value: 'ext4 and xfs with d_type=true', correct: true }
+      - { value: 'NTFS and FAT32', correct: false }
+      - { value: 'zfs only', correct: false }
+      - { value: 'btrfs only', correct: false }
     help: https://docs.docker.com/storage/storagedriver/overlayfs-driver/#prerequisites
 
   - uuid: 5b2ac111-2b32-4a24-9a2c-7fefc851be18
     question: Which storage driver provides advanced features such as snapshots and quotas but requires a dedicated filesystem?
     answers:
-      - { value: "aufs", correct: false }
-      - { value: "windowsfilter", correct: false }
-      - { value: "overlay2", correct: false }
-      - { value: "btrfs", correct: true }
+      - { value: 'aufs', correct: false }
+      - { value: 'windowsfilter', correct: false }
+      - { value: 'overlay2', correct: false }
+      - { value: 'btrfs', correct: true }
     help: https://docs.docker.com/storage/storagedriver/btrfs-driver/
 
   - uuid: 6d88cc7a-b5db-4f34-bc42-dc8df46a297e
     question: Which graph driver is mandatory when Docker runs on ZFS?
     answers:
-      - { value: "zfs", correct: true }
-      - { value: "devicemapper", correct: false }
-      - { value: "overlay2", correct: false }
-      - { value: "aufs", correct: false }
+      - { value: 'zfs', correct: true }
+      - { value: 'devicemapper', correct: false }
+      - { value: 'overlay2', correct: false }
+      - { value: 'aufs', correct: false }
     help: https://docs.docker.com/storage/storagedriver/zfs-driver/
 
   - uuid: 7c2f5128-cf2a-4c1d-9183-5c92fb156188
     question: What storage driver is the fallback on RHEL/CentOS when overlay2 is not available?
     answers:
-      - { value: "devicemapper (direct-lvm mode)", correct: true }
-      - { value: "aufs", correct: false }
-      - { value: "btrfs", correct: false }
-      - { value: "windowsfilter", correct: false }
+      - { value: 'devicemapper (direct-lvm mode)', correct: true }
+      - { value: 'aufs', correct: false }
+      - { value: 'btrfs', correct: false }
+      - { value: 'windowsfilter', correct: false }
     help: https://docs.docker.com/storage/storagedriver/device-mapper-driver/
 
   - uuid: 8e92c0d3-bf23-48c3-b4df-148f2d515b67
     question: Which Windows storage driver is used by default in Windows Server Containers?
     answers:
-      - { value: "windowsfilter", correct: true }
-      - { value: "aufs", correct: false }
-      - { value: "devicemapper", correct: false }
-      - { value: "overlay2", correct: false }
+      - { value: 'windowsfilter', correct: true }
+      - { value: 'aufs', correct: false }
+      - { value: 'devicemapper', correct: false }
+      - { value: 'overlay2', correct: false }
     help: https://docs.docker.com/engine/storage/drivers/windowsfilter-driver/
 
   - uuid: 9d2f8347-0fa9-47d8-9cf1-1b82a7ef1cc8
     question: What is a key limitation of the devicemapper storage driver in loop-lvm mode?
     answers:
-      - { value: "Does not support container restart", correct: false }
-      - { value: "Images cannot be shared across hosts", correct: false }
-      - { value: "Poor performance, not recommended for production", correct: true }
-      - { value: "Only works on NTFS partitions", correct: false }
+      - { value: 'Does not support container restart', correct: false }
+      - { value: 'Images cannot be shared across hosts', correct: false }
+      - { value: 'Poor performance, not recommended for production', correct: true }
+      - { value: 'Only works on NTFS partitions', correct: false }
     help: https://docs.docker.com/storage/storagedriver/device-mapper-driver/
 
   - uuid: a473c98b-2c6f-498a-8cf4-b5ebaf3770a2
     question: Which storage driver should you choose for Docker in production on Linux if no special filesystem requirements exist?
     answers:
-      - { value: "aufs", correct: false }
-      - { value: "zfs", correct: false }
-      - { value: "overlay2", correct: true }
-      - { value: "btrfs", correct: false }
+      - { value: 'aufs', correct: false }
+      - { value: 'zfs', correct: false }
+      - { value: 'overlay2', correct: true }
+      - { value: 'btrfs', correct: false }
     help: https://docs.docker.com/storage/storagedriver/select-storage-driver/
diff --git a/data/6_storage_and_volumes/layers_filesystem.yaml b/data/6_storage_and_volumes/layers_filesystem.yaml
index c04fadf..1ee29d5 100644
--- a/data/6_storage_and_volumes/layers_filesystem.yaml
+++ b/data/6_storage_and_volumes/layers_filesystem.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: 0a5bc9a7-d1d3-4c2d-95c5-b93487206aaf
     question: How is a Docker image structured internally?
     answers:
-      - { value: "It is stored only in memory", correct: false }
-      - { value: "It is a tarball extracted at runtime", correct: false }
-      - { value: "It is built from a series of read-only layers stacked together", correct: true }
-      - { value: "It is a single monolithic binary file", correct: false }
+      - { value: 'It is stored only in memory', correct: false }
+      - { value: 'It is a tarball extracted at runtime', correct: false }
+      - { value: 'It is built from a series of read-only layers stacked together', correct: true }
+      - { value: 'It is a single monolithic binary file', correct: false }
     help: https://docs.docker.com/storage/storagedriver/
 
   - uuid: 7882d43e-bb16-4ef8-a33d-efea870cf9f9
     question: What happens when multiple images share the same base layer?
     answers:
-      - { value: "The images cannot run simultaneously", correct: false }
-      - { value: "Each image duplicates the base layer", correct: false }
-      - { value: "They reuse the layer, saving disk space", correct: true }
-      - { value: "The base layer is deleted automatically", correct: false }
+      - { value: 'The images cannot run simultaneously', correct: false }
+      - { value: 'Each image duplicates the base layer', correct: false }
+      - { value: 'They reuse the layer, saving disk space', correct: true }
+      - { value: 'The base layer is deleted automatically', correct: false }
     help: https://docs.docker.com/storage/storagedriver/
 
   - uuid: 4127e5aa-429f-4c58-a7c8-c80ab7a84a9a
     question: Where are image and container layers stored on the host filesystem by default?
     answers:
-      - { value: "/usr/local/lib/docker", correct: false }
-      - { value: "/etc/docker", correct: false }
-      - { value: "/var/lib/docker", correct: true }
-      - { value: "/opt/docker/layers", correct: false }
+      - { value: '/usr/local/lib/docker', correct: false }
+      - { value: '/etc/docker', correct: false }
+      - { value: '/var/lib/docker', correct: true }
+      - { value: '/opt/docker/layers', correct: false }
     help: https://docs.docker.com/storage/storagedriver/#docker-storage-drivers
 
   - uuid: 92a49c67-7898-4b2c-86fb-4cc21ddf3b25
     question: What is the role of the container’s writable layer?
     answers:
-      - { value: "It is used only for networking", correct: false }
-      - { value: "It contains only the Dockerfile", correct: false }
-      - { value: "It replaces all read-only image layers", correct: false }
-      - { value: "It stores changes such as logs, temporary files, or new data created by the container", correct: true }
+      - { value: 'It is used only for networking', correct: false }
+      - { value: 'It contains only the Dockerfile', correct: false }
+      - { value: 'It replaces all read-only image layers', correct: false }
+      - { value: 'It stores changes such as logs, temporary files, or new data created by the container', correct: true }
     help: https://docs.docker.com/storage/storagedriver/#the-copy-on-write-strategy
 
   - uuid: 14f3a1a5-0fa5-49f8-aba3-dfd0b0b5c567
     question: What happens to a container’s writable layer when the container is deleted?
     answers:
-      - { value: "It is removed along with the container", correct: true }
-      - { value: "It is automatically mounted as a volume", correct: false }
-      - { value: "It is saved as a new image by default", correct: false }
-      - { value: "It persists until the Docker service is restarted", correct: false }
+      - { value: 'It is removed along with the container', correct: true }
+      - { value: 'It is automatically mounted as a volume', correct: false }
+      - { value: 'It is saved as a new image by default', correct: false }
+      - { value: 'It persists until the Docker service is restarted', correct: false }
     help: https://docs.docker.com/storage/storagedriver/#container-layers
 
   - uuid: 1f3ac09e-beb1-4b5b-9125-d8d0e05a70b7
     question: Which Docker storage driver is recommended for modern Linux distributions to manage layers?
     answers:
-      - { value: "overlay2", correct: true }
-      - { value: "devicemapper", correct: false }
-      - { value: "btrfs", correct: false }
-      - { value: "aufs", correct: false }
+      - { value: 'overlay2', correct: true }
+      - { value: 'devicemapper', correct: false }
+      - { value: 'btrfs', correct: false }
+      - { value: 'aufs', correct: false }
     help: https://docs.docker.com/storage/storagedriver/overlayfs-driver/
 
   - uuid: 10cc50f0-29a4-4f1a-bf95-8db83df0dbff
     question: How does Docker implement the copy-on-write strategy with image layers?
     answers:
-      - { value: "Each image has a unique copy of its base layers", correct: false }
-      - { value: "Files are merged permanently across layers", correct: false }
-      - { value: "Files are only copied into the writable layer when modified", correct: true }
-      - { value: "All layers are fully copied into the container at start", correct: false }
+      - { value: 'Each image has a unique copy of its base layers', correct: false }
+      - { value: 'Files are merged permanently across layers', correct: false }
+      - { value: 'Files are only copied into the writable layer when modified', correct: true }
+      - { value: 'All layers are fully copied into the container at start', correct: false }
     help: https://docs.docker.com/storage/storagedriver/#the-copy-on-write-strategy
 
   - uuid: 53b6b8d5-713d-4b46-8fb6-1b236d68dc1d
     question: How can you view the layers of an image?
     answers:
-      - { value: "ls /var/lib/docker/layers/<image>", correct: false }
-      - { value: "docker layers <image>", correct: false }
-      - { value: "docker history <image>", correct: true }
-      - { value: "docker image tree <image>", correct: false }
+      - { value: 'ls /var/lib/docker/layers/<image>', correct: false }
+      - { value: 'docker layers <image>', correct: false }
+      - { value: 'docker history <image>', correct: true }
+      - { value: 'docker image tree <image>', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/history/
 
   - uuid: 02f5a5e6-3054-4f9d-b059-1bbf7a4ab92d
     question: Which type of layer is shared across containers?
     answers:
-      - { value: "Volumes", correct: false }
-      - { value: "Writable container layer", correct: false }
-      - { value: "Read-only image layers", correct: true }
-      - { value: "tmpfs mounts", correct: false }
+      - { value: 'Volumes', correct: false }
+      - { value: 'Writable container layer', correct: false }
+      - { value: 'Read-only image layers', correct: true }
+      - { value: 'tmpfs mounts', correct: false }
     help: https://docs.docker.com/storage/storagedriver/
 
   - uuid: 5b819d9f-7a36-476a-b9aa-2d46df1dbf2b
     question: Which command shows both image layers and their approximate size?
     answers:
-      - { value: "docker layer ls", correct: false }
-      - { value: "docker inspect --layers", correct: false }
-      - { value: "docker image show-layers", correct: false }
-      - { value: "docker history", correct: true }
+      - { value: 'docker layer ls', correct: false }
+      - { value: 'docker inspect --layers', correct: false }
+      - { value: 'docker image show-layers', correct: false }
+      - { value: 'docker history', correct: true }
     help: https://docs.docker.com/engine/reference/commandline/history/
diff --git a/data/6_storage_and_volumes/peristent_volumes.yaml b/data/6_storage_and_volumes/peristent_volumes.yaml
index 2e66fc7..97b0644 100644
--- a/data/6_storage_and_volumes/peristent_volumes.yaml
+++ b/data/6_storage_and_volumes/peristent_volumes.yaml
@@ -2,125 +2,125 @@ questions:
   - uuid: 5c3f8f61-3e19-4e6f-9a3f-6f3f1f5c2a11
     question: Which Kubernetes object should an application reference in order to mount persistent storage?
     answers:
-      - { value: "A PersistentVolume (PV) directly in the Pod spec", correct: false }
-      - { value: "A ConfigMap with the disk path", correct: false }
-      - { value: "A PersistentVolumeClaim (PVC) referenced in the Pod spec", correct: true }
-      - { value: "A StorageClass directly in the Pod spec", correct: false }
+      - { value: 'A PersistentVolume (PV) directly in the Pod spec', correct: false }
+      - { value: 'A ConfigMap with the disk path', correct: false }
+      - { value: 'A PersistentVolumeClaim (PVC) referenced in the Pod spec', correct: true }
+      - { value: 'A StorageClass directly in the Pod spec', correct: false }
     help: https://kubernetes.io/docs/concepts/storage/persistent-volumes/#claims-as-volumes
 
   - uuid: 9a9c8a2c-4c2b-4b2a-8b8b-2d3b5f2b1a77
     question: What is the typical sequence for dynamic provisioning of storage?
     answers:
-      - { value: "Create CSI Driver → Pod mounts disk without PVC", correct: false }
-      - { value: "Create Pod → PVC is autogenerated → PV is optional", correct: false }
-      - { value: "Create PV → Pod mounts PV directly → StorageClass is optional", correct: false }
-      - { value: "Create StorageClass → Create PVC → Kubernetes dynamically creates a matching PV → Pod mounts the PVC", correct: true }
+      - { value: 'Create CSI Driver → Pod mounts disk without PVC', correct: false }
+      - { value: 'Create Pod → PVC is autogenerated → PV is optional', correct: false }
+      - { value: 'Create PV → Pod mounts PV directly → StorageClass is optional', correct: false }
+      - { value: 'Create StorageClass → Create PVC → Kubernetes dynamically creates a matching PV → Pod mounts the PVC', correct: true }
     help: https://kubernetes.io/docs/concepts/storage/storage-classes/
 
   - uuid: 3c1b4b93-0a8d-4d2e-b1d1-8e5c9fcb92e4
     question: Which fields MUST a PVC specify to request storage?
     answers:
-      - { value: "reclaimPolicy and volumeMode", correct: false }
-      - { value: "accessModes and resources.requests.storage", correct: true }
-      - { value: "mountOptions and fsType", correct: false }
-      - { value: "nodeSelector and tolerations", correct: false }
+      - { value: 'reclaimPolicy and volumeMode', correct: false }
+      - { value: 'accessModes and resources.requests.storage', correct: true }
+      - { value: 'mountOptions and fsType', correct: false }
+      - { value: 'nodeSelector and tolerations', correct: false }
     help: https://kubernetes.io/docs/concepts/storage/persistent-volumes/#persistentvolumeclaims
 
   - uuid: e2e9f6a4-0b2c-4f8c-9e51-bf1a8f9c3c6d
     question: How does a Pod mount a PVC?
     answers:
-      - { value: "Use hostPath pointing to the PV", correct: false }
-      - { value: "Reference the PV name directly in volumeMounts", correct: false }
-      - { value: "Add a volume with persistentVolumeClaim.claimName and mount it via volumeMounts in the container", correct: true }
-      - { value: "Set storageClassName in the Pod spec", correct: false }
+      - { value: 'Use hostPath pointing to the PV', correct: false }
+      - { value: 'Reference the PV name directly in volumeMounts', correct: false }
+      - { value: 'Add a volume with persistentVolumeClaim.claimName and mount it via volumeMounts in the container', correct: true }
+      - { value: 'Set storageClassName in the Pod spec', correct: false }
     help: https://kubernetes.io/docs/concepts/storage/persistent-volumes/#claims-as-volumes
 
   - uuid: 6f3a1a2e-2f7a-4002-8f7e-7d6a9b2f553d
     question: Which access mode allows a volume to be mounted read-write by a single node?
     answers:
-      - { value: "WriteOnlyMany (WOM)", correct: false }
-      - { value: "ReadWriteMany (RWX)", correct: false }
-      - { value: "ReadWriteOnce (RWO)", correct: true }
-      - { value: "ReadOnlyMany (ROX)", correct: false }
+      - { value: 'WriteOnlyMany (WOM)', correct: false }
+      - { value: 'ReadWriteMany (RWX)', correct: false }
+      - { value: 'ReadWriteOnce (RWO)', correct: true }
+      - { value: 'ReadOnlyMany (ROX)', correct: false }
     help: https://kubernetes.io/docs/concepts/storage/persistent-volumes/#access-modes
 
   - uuid: 1a7b2d51-6f67-4f26-9878-64d6e5859234
     question: Which access mode is typically required to share the same volume across multiple Pods on different nodes?
     answers:
-      - { value: "Any access mode works", correct: false }
-      - { value: "ReadOnlyMany (ROX) only", correct: false }
-      - { value: "ReadWriteMany (RWX)", correct: true }
-      - { value: "ReadWriteOnce (RWO)", correct: false }
+      - { value: 'Any access mode works', correct: false }
+      - { value: 'ReadOnlyMany (ROX) only', correct: false }
+      - { value: 'ReadWriteMany (RWX)', correct: true }
+      - { value: 'ReadWriteOnce (RWO)', correct: false }
     help: https://kubernetes.io/docs/concepts/storage/persistent-volumes/#access-modes
 
   - uuid: 7b6a3a53-0a5f-4da1-8c18-298e2f0256ab
     question: What does the StorageClass reclaimPolicy 'Delete' do when a bound PVC is deleted?
     answers:
-      - { value: "It converts the PV to a ConfigMap", correct: false }
-      - { value: "It deletes the underlying PV and the external storage resource", correct: true }
-      - { value: "It snapshots the PV and then retains it", correct: false }
-      - { value: "It retains the PV but clears the data", correct: false }
+      - { value: 'It converts the PV to a ConfigMap', correct: false }
+      - { value: 'It deletes the underlying PV and the external storage resource', correct: true }
+      - { value: 'It snapshots the PV and then retains it', correct: false }
+      - { value: 'It retains the PV but clears the data', correct: false }
     help: https://kubernetes.io/docs/concepts/storage/persistent-volumes/#reclaiming
 
   - uuid: 4d8e2f42-6e6a-4c20-9d6a-1b2a6d2a8caa
     question: 'What is the effect of setting StorageClass parameter `volumeBindingMode: WaitForFirstConsumer`?'
     answers:
-      - { value: "Delays PV provisioning and binding until a Pod is scheduled, enabling topology-aware placement", correct: true }
-      - { value: "Forces immediate PV creation on all nodes", correct: false }
-      - { value: "Makes the PVC read-only until a Pod starts", correct: false }
-      - { value: "Requires manual PV creation", correct: false }
+      - { value: 'Delays PV provisioning and binding until a Pod is scheduled, enabling topology-aware placement', correct: true }
+      - { value: 'Forces immediate PV creation on all nodes', correct: false }
+      - { value: 'Makes the PVC read-only until a Pod starts', correct: false }
+      - { value: 'Requires manual PV creation', correct: false }
     help: https://kubernetes.io/docs/concepts/storage/storage-classes/#volume-binding-mode
 
   - uuid: 0f4aa9b1-6a1c-4f1a-a1b6-0c0a86d9b5f7
     question: Which volumeMode writes a raw block device into the container instead of a mounted filesystem?
     answers:
-      - { value: "fsType: block", correct: false }
-      - { value: "mountOptions: block", correct: false }
-      - { value: "volumeMode: Block", correct: true }
-      - { value: "volumeMode: Filesystem", correct: false }
+      - { value: 'fsType: block', correct: false }
+      - { value: 'mountOptions: block', correct: false }
+      - { value: 'volumeMode: Block', correct: true }
+      - { value: 'volumeMode: Filesystem', correct: false }
     help: https://kubernetes.io/docs/concepts/storage/persistent-volumes/#raw-block-volume-support
 
   - uuid: 2e4f6cb8-0c8a-4b1c-9d7d-8f3d9c2b7c66
     question: For static provisioning, what must be true for a PV to bind to a PVC?
     answers:
-      - { value: "The PV must be created after the PVC", correct: false }
-      - { value: "PV capacity ≥ PVC request, accessModes compatible, and StorageClass (or none) matches", correct: true }
-      - { value: "PV and PVC must have identical names", correct: false }
-      - { value: "The PV must be in the same namespace", correct: false }
+      - { value: 'The PV must be created after the PVC', correct: false }
+      - { value: 'PV capacity ≥ PVC request, accessModes compatible, and StorageClass (or none) matches', correct: true }
+      - { value: 'PV and PVC must have identical names', correct: false }
+      - { value: 'The PV must be in the same namespace', correct: false }
     help: https://kubernetes.io/docs/concepts/storage/persistent-volumes/#binding
 
   - uuid: c8b6342d-0e56-4f0e-9b16-0b9df2f2b4c1
     question: How do you request dynamic provisioning using the cluster’s default StorageClass?
     answers:
-      - { value: "Reference the CSI Driver directly in the Pod", correct: false }
-      - { value: "Set accessModes to RWX only", correct: false }
-      - { value: "Create a PVC without specifying storageClassName (or set it to the default class name)", correct: true }
-      - { value: "Create a PV first and omit the StorageClass", correct: false }
+      - { value: 'Reference the CSI Driver directly in the Pod', correct: false }
+      - { value: 'Set accessModes to RWX only', correct: false }
+      - { value: 'Create a PVC without specifying storageClassName (or set it to the default class name)', correct: true }
+      - { value: 'Create a PV first and omit the StorageClass', correct: false }
     help: https://kubernetes.io/docs/concepts/storage/persistent-volumes/#dynamic
 
   - uuid: a9d0b1c7-6f77-40d0-8c92-8f5a1a7b1e12
     question: Which command shows whether a PVC has been bound to a PV?
     answers:
-      - { value: "kubectl get sc --show-bound", correct: false }
-      - { value: "kubectl get pv -n <ns>", correct: false }
-      - { value: "kubectl get pvc -o wide (STATUS should be Bound)", correct: true }
-      - { value: "kubectl describe pod only", correct: false }
+      - { value: 'kubectl get sc --show-bound', correct: false }
+      - { value: 'kubectl get pv -n <ns>', correct: false }
+      - { value: 'kubectl get pvc -o wide (STATUS should be Bound)', correct: true }
+      - { value: 'kubectl describe pod only', correct: false }
     help: https://kubernetes.io/docs/tasks/configure-pod-container/configure-persistent-volume-storage/
 
   - uuid: 1f6f0d7a-8c28-4b2b-8c4f-1b2c9e7f6e40
     question: Which statement about hostPath volumes is TRUE for production use?
     answers:
-      - { value: "They are node-local and not recommended for multi-node Pod portability", correct: true }
-      - { value: "They support RWX across nodes by default", correct: false }
-      - { value: "They automatically replicate data", correct: false }
-      - { value: "They are dynamically provisioned like PVCs", correct: false }
+      - { value: 'They are node-local and not recommended for multi-node Pod portability', correct: true }
+      - { value: 'They support RWX across nodes by default', correct: false }
+      - { value: 'They automatically replicate data', correct: false }
+      - { value: 'They are dynamically provisioned like PVCs', correct: false }
     help: https://kubernetes.io/docs/concepts/storage/volumes/#hostpath
 
   - uuid: 0e7c20d4-23a8-4d1c-9a1f-1a7f2e7b3c9d
     question: To allow PVC filesystem expansion after creation, what must be enabled?
     answers:
-      - { value: "StorageClass allowVolumeExpansion: true and supported driver; Pod may need restart to resize fs", correct: true }
-      - { value: "Set reclaimPolicy: Expand", correct: false }
-      - { value: "PVC accessModes must include RWX", correct: false }
-      - { value: "Annotate the PV with resize.kubernetes.io/true", correct: false }
+      - { value: 'StorageClass allowVolumeExpansion: true and supported driver; Pod may need restart to resize fs', correct: true }
+      - { value: 'Set reclaimPolicy: Expand', correct: false }
+      - { value: 'PVC accessModes must include RWX', correct: false }
+      - { value: 'Annotate the PV with resize.kubernetes.io/true', correct: false }
     help: https://kubernetes.io/docs/concepts/storage/persistent-volumes/#expanding-persistent-volumes-claims
diff --git a/data/6_storage_and_volumes/persistent_storage.yaml b/data/6_storage_and_volumes/persistent_storage.yaml
index 08acff6..83a9b37 100644
--- a/data/6_storage_and_volumes/persistent_storage.yaml
+++ b/data/6_storage_and_volumes/persistent_storage.yaml
@@ -2,89 +2,89 @@ questions:
   - uuid: 41f3b9ab-7a51-49b4-944c-6a7ad1987c2c
     question: What is the primary purpose of Docker volumes?
     answers:
-      - { value: "To share environment variables", correct: false }
-      - { value: "To manage container networking", correct: false }
-      - { value: "To provide persistent storage independent of container lifecycle", correct: true }
-      - { value: "To reduce image size", correct: false }
+      - { value: 'To share environment variables', correct: false }
+      - { value: 'To manage container networking', correct: false }
+      - { value: 'To provide persistent storage independent of container lifecycle', correct: true }
+      - { value: 'To reduce image size', correct: false }
     help: https://docs.docker.com/storage/volumes/
 
   - uuid: 51c87d90-1c43-4027-bd45-7c1c682d3c91
     question: Where are Docker volumes stored on the host by default?
     answers:
-      - { value: "/usr/local/docker/storage", correct: false }
-      - { value: "/var/lib/docker/volumes", correct: true }
-      - { value: "/etc/docker/volumes", correct: false }
-      - { value: "/opt/docker/persistent", correct: false }
+      - { value: '/usr/local/docker/storage', correct: false }
+      - { value: '/var/lib/docker/volumes', correct: true }
+      - { value: '/etc/docker/volumes', correct: false }
+      - { value: '/opt/docker/persistent', correct: false }
     help: https://docs.docker.com/storage/volumes/#start-a-container-with-a-volume
 
   - uuid: 87b8c5fc-0f87-4f97-8f13-478e16a8d74d
     question: What happens to data in a volume when the container using it is removed?
     answers:
-      - { value: "The data is deleted automatically", correct: false }
-      - { value: "The data persists and can be reused by other containers", correct: true }
-      - { value: "The data is moved into the image", correct: false }
-      - { value: "The data is encrypted", correct: false }
+      - { value: 'The data is deleted automatically', correct: false }
+      - { value: 'The data persists and can be reused by other containers', correct: true }
+      - { value: 'The data is moved into the image', correct: false }
+      - { value: 'The data is encrypted', correct: false }
     help: https://docs.docker.com/storage/volumes/#remove-volumes
 
   - uuid: 8fcd4e6f-2c45-4a62-b018-25d3d20f1655
     question: Which command is used to create a new named volume?
     answers:
-      - { value: "docker volume add mydata", correct: false }
-      - { value: "docker storage create mydata", correct: false }
-      - { value: "docker persist create mydata", correct: false }
-      - { value: "docker volume create mydata", correct: true }
+      - { value: 'docker volume add mydata', correct: false }
+      - { value: 'docker storage create mydata', correct: false }
+      - { value: 'docker persist create mydata', correct: false }
+      - { value: 'docker volume create mydata', correct: true }
     help: https://docs.docker.com/engine/reference/commandline/volume_create/
 
   - uuid: f3cbadf2-1080-4f9a-9e8e-b8dba88ad2f5
     question: Which command lists all Docker volumes?
     answers:
-      - { value: "docker storage ls", correct: false }
-      - { value: "docker volumes list", correct: false }
-      - { value: "docker volume ls", correct: true }
-      - { value: "docker volume show", correct: false }
+      - { value: 'docker storage ls', correct: false }
+      - { value: 'docker volumes list', correct: false }
+      - { value: 'docker volume ls', correct: true }
+      - { value: 'docker volume show', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/volume_ls/
 
   - uuid: 94754b3b-2d17-4a82-90af-01e1a1987a91
     question: What is the main difference between a volume and a bind mount?
     answers:
-      - { value: "Volumes are managed by Docker, bind mounts map directly to a host path", correct: true }
-      - { value: "Volumes can only be read-only", correct: false }
-      - { value: "Bind mounts are encrypted, volumes are not", correct: false }
-      - { value: "Bind mounts persist after Docker uninstall, volumes do not", correct: false }
+      - { value: 'Volumes are managed by Docker, bind mounts map directly to a host path', correct: true }
+      - { value: 'Volumes can only be read-only', correct: false }
+      - { value: 'Bind mounts are encrypted, volumes are not', correct: false }
+      - { value: 'Bind mounts persist after Docker uninstall, volumes do not', correct: false }
     help: https://docs.docker.com/storage/volumes/#choose-the-right-type-of-mount
 
   - uuid: eac5d5c6-fdd3-46a8-86bb-872af5d828b1
     question: How can you mount a named volume into a container?
     answers:
-      - { value: "docker run --volume-driver=mydata nginx", correct: false }
-      - { value: "docker run -v mydata:/data nginx", correct: true }
-      - { value: "docker run --persist mydata:/data nginx", correct: false }
-      - { value: "docker mount --volume mydata nginx", correct: false }
+      - { value: 'docker run --volume-driver=mydata nginx', correct: false }
+      - { value: 'docker run -v mydata:/data nginx', correct: true }
+      - { value: 'docker run --persist mydata:/data nginx', correct: false }
+      - { value: 'docker mount --volume mydata nginx', correct: false }
     help: https://docs.docker.com/storage/volumes/#start-a-container-with-a-volume
 
   - uuid: 6ad57a46-8c04-480d-a634-934d5de9ee8e
     question: Which Docker feature allows using third-party storage backends (e.g., NFS, cloud storage)?
     answers:
-      - { value: "Dockerfile COPY instruction", correct: false }
-      - { value: "Bind mounts", correct: false }
-      - { value: "Volume drivers", correct: true }
-      - { value: "Storage plugins only for Swarm", correct: false }
+      - { value: 'Dockerfile COPY instruction', correct: false }
+      - { value: 'Bind mounts', correct: false }
+      - { value: 'Volume drivers', correct: true }
+      - { value: 'Storage plugins only for Swarm', correct: false }
     help: https://docs.docker.com/storage/volumes/#use-a-volume-driver
 
   - uuid: 11bff894-bfa5-4c3e-8c9a-3b512c69d708
     question: How do you remove an unused Docker volume?
     answers:
-      - { value: "docker storage delete mydata", correct: false }
-      - { value: "docker rm --volume mydata", correct: false }
-      - { value: "docker volume rm mydata", correct: true }
-      - { value: "docker volume drop mydata", correct: false }
+      - { value: 'docker storage delete mydata', correct: false }
+      - { value: 'docker rm --volume mydata', correct: false }
+      - { value: 'docker volume rm mydata', correct: true }
+      - { value: 'docker volume drop mydata', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/volume_rm/
 
   - uuid: a80202e2-82b5-4d2e-8b1f-b15e1ffdb9ae
     question: What is the risk of using anonymous volumes (created without a name)?
     answers:
-      - { value: "They cannot store application data", correct: false }
-      - { value: "They can accumulate and consume disk space if not explicitly removed", correct: true }
-      - { value: "They are automatically shared between all containers", correct: false }
-      - { value: "They are deleted whenever a container restarts", correct: false }
+      - { value: 'They cannot store application data', correct: false }
+      - { value: 'They can accumulate and consume disk space if not explicitly removed', correct: true }
+      - { value: 'They are automatically shared between all containers', correct: false }
+      - { value: 'They are deleted whenever a container restarts', correct: false }
     help: https://docs.docker.com/storage/volumes/#remove-anonymous-volumes
diff --git a/data/6_storage_and_volumes/relationship_storage_volume.yaml b/data/6_storage_and_volumes/relationship_storage_volume.yaml
index 80e7f8a..60b1dd3 100644
--- a/data/6_storage_and_volumes/relationship_storage_volume.yaml
+++ b/data/6_storage_and_volumes/relationship_storage_volume.yaml
@@ -2,80 +2,80 @@ questions:
   - uuid: 4eac18b5-46df-46ce-b92b-1825d3c47c1f
     question: What is the role of a CSI (Container Storage Interface) driver in Kubernetes?
     answers:
-      - { value: "It handles network ingress rules", correct: false }
-      - { value: "It provides the plugin implementation to provision and manage external storage systems", correct: true }
-      - { value: "It configures Docker overlay2 drivers", correct: false }
-      - { value: "It stores Pod logs in the node filesystem", correct: false }
+      - { value: 'It handles network ingress rules', correct: false }
+      - { value: 'It provides the plugin implementation to provision and manage external storage systems', correct: true }
+      - { value: 'It configures Docker overlay2 drivers', correct: false }
+      - { value: 'It stores Pod logs in the node filesystem', correct: false }
     help: https://kubernetes.io/docs/concepts/storage/volumes/#csi
 
   - uuid: 1b44b8f8-6d36-4f77-9d92-2c8573f0b87a
     question: What is the relationship between a StorageClass and a CSI driver?
     answers:
-      - { value: "A StorageClass directly mounts a volume into a Pod", correct: false }
-      - { value: "A StorageClass defines parameters and policies for provisioning storage through a CSI driver", correct: true }
-      - { value: "They are unrelated objects in Kubernetes", correct: false }
-      - { value: "A CSI driver creates PVCs automatically", correct: false }
+      - { value: 'A StorageClass directly mounts a volume into a Pod', correct: false }
+      - { value: 'A StorageClass defines parameters and policies for provisioning storage through a CSI driver', correct: true }
+      - { value: 'They are unrelated objects in Kubernetes', correct: false }
+      - { value: 'A CSI driver creates PVCs automatically', correct: false }
     help: https://kubernetes.io/docs/concepts/storage/storage-classes/
 
   - uuid: 5d2a7a6d-2306-4474-88bc-75d5f4c0b0dd
     question: What happens when a PersistentVolumeClaim (PVC) is created with a StorageClass?
     answers:
-      - { value: "The PVC creates a tmpfs volume", correct: false }
-      - { value: "The PVC replaces the CSI driver configuration", correct: false }
-      - { value: "The PVC directly binds to the Pod without a PV", correct: false }
-      - { value: "Kubernetes requests the CSI driver (through the StorageClass) to dynamically provision a PersistentVolume (PV)", correct: true }
+      - { value: 'The PVC creates a tmpfs volume', correct: false }
+      - { value: 'The PVC replaces the CSI driver configuration', correct: false }
+      - { value: 'The PVC directly binds to the Pod without a PV', correct: false }
+      - { value: 'Kubernetes requests the CSI driver (through the StorageClass) to dynamically provision a PersistentVolume (PV)', correct: true }
     help: https://kubernetes.io/docs/concepts/storage/persistent-volumes/#dynamic
 
   - uuid: 64fa91c4-59fd-4c56-9b64-d0f1f1e38f50
     question: What is the role of a PersistentVolume (PV) in Kubernetes?
     answers:
-      - { value: "It only exists for in-memory storage", correct: false }
-      - { value: "It is used to manage node labels", correct: false }
-      - { value: "It is the actual representation of the storage resource provisioned by the CSI driver", correct: true }
-      - { value: "It is a Pod configuration file", correct: false }
+      - { value: 'It only exists for in-memory storage', correct: false }
+      - { value: 'It is used to manage node labels', correct: false }
+      - { value: 'It is the actual representation of the storage resource provisioned by the CSI driver', correct: true }
+      - { value: 'It is a Pod configuration file', correct: false }
     help: https://kubernetes.io/docs/concepts/storage/persistent-volumes/#persistent-volumes
 
   - uuid: 4a3c82e5-3f91-44ff-9b26-18638e62a8de
     question: How does a Pod use storage provisioned by a CSI driver?
     answers:
-      - { value: "The Pod spec defines a volume that references a PVC, which is bound to a PV provisioned by the CSI driver", correct: true }
-      - { value: "The Pod uses a ConfigMap to access the volume", correct: false }
-      - { value: "The Pod directly references the CSI driver", correct: false }
-      - { value: "The Pod mounts the StorageClass directly", correct: false }
+      - { value: 'The Pod spec defines a volume that references a PVC, which is bound to a PV provisioned by the CSI driver', correct: true }
+      - { value: 'The Pod uses a ConfigMap to access the volume', correct: false }
+      - { value: 'The Pod directly references the CSI driver', correct: false }
+      - { value: 'The Pod mounts the StorageClass directly', correct: false }
     help: https://kubernetes.io/docs/concepts/storage/persistent-volumes/#claims-as-volumes
 
   - uuid: 3cc8a6b3-dc94-42a2-9158-8c80f91f4aaf
     question: Which Kubernetes object is responsible for defining volume access modes like ReadWriteOnce or ReadWriteMany?
     answers:
-      - { value: "StorageClass", correct: false }
-      - { value: "Pod spec", correct: false }
-      - { value: "CSI Driver", correct: false }
-      - { value: "PersistentVolumeClaim (PVC)", correct: true }
+      - { value: 'StorageClass', correct: false }
+      - { value: 'Pod spec', correct: false }
+      - { value: 'CSI Driver', correct: false }
+      - { value: 'PersistentVolumeClaim (PVC)', correct: true }
     help: https://kubernetes.io/docs/concepts/storage/persistent-volumes/#access-modes
 
   - uuid: a9382b20-39a7-4ec3-bb6f-4a62e3b2f3ac
     question: Which object connects user requests for storage to the actual provisioned volume?
     answers:
-      - { value: "CSI Driver directly", correct: false }
-      - { value: "StorageClass", correct: false }
-      - { value: "kubectl create volume", correct: false }
-      - { value: "PersistentVolumeClaim (PVC)", correct: true }
+      - { value: 'CSI Driver directly', correct: false }
+      - { value: 'StorageClass', correct: false }
+      - { value: 'kubectl create volume', correct: false }
+      - { value: 'PersistentVolumeClaim (PVC)', correct: true }
     help: https://kubernetes.io/docs/concepts/storage/persistent-volumes/#binding
 
   - uuid: e1f1f6e2-914c-4769-8510-56f1f7e9a3cc
     question: What does 'WaitForFirstConsumer' volumeBindingMode in a StorageClass ensure?
     answers:
-      - { value: "The PV is shared by all namespaces automatically", correct: false }
-      - { value: "The PV is always provisioned immediately", correct: false }
-      - { value: "The PVC becomes read-only", correct: false }
-      - { value: "PV provisioning is delayed until a Pod using the PVC is scheduled, enabling topology-aware placement", correct: true }
+      - { value: 'The PV is shared by all namespaces automatically', correct: false }
+      - { value: 'The PV is always provisioned immediately', correct: false }
+      - { value: 'The PVC becomes read-only', correct: false }
+      - { value: 'PV provisioning is delayed until a Pod using the PVC is scheduled, enabling topology-aware placement', correct: true }
     help: https://kubernetes.io/docs/concepts/storage/storage-classes/#volume-binding-mode
 
   - uuid: 5e4f7a17-2d66-4f7a-87d6-5f1a66c7a48e
     question: Which statement BEST describes the overall relationship of CSI, StorageClass, PVC, PV, and Pod volume?
     answers:
-      - { value: "StorageClass and PVC are optional aliases for ConfigMaps", correct: false }
-      - { value: "PV and PVC are identical objects with different names", correct: false }
-      - { value: "CSI driver implements storage, StorageClass defines how to provision it, PVC requests it, PV represents it, and Pod volume consumes it", correct: true }
-      - { value: "CSI driver provisions PVCs, StorageClass creates Pods, PV defines namespaces, and Pod uses CSI directly", correct: false }
+      - { value: 'StorageClass and PVC are optional aliases for ConfigMaps', correct: false }
+      - { value: 'PV and PVC are identical objects with different names', correct: false }
+      - { value: 'CSI driver implements storage, StorageClass defines how to provision it, PVC requests it, PV represents it, and Pod volume consumes it', correct: true }
+      - { value: 'CSI driver provisions PVCs, StorageClass creates Pods, PV defines namespaces, and Pod uses CSI directly', correct: false }
     help: https://kubernetes.io/docs/concepts/storage/persistent-volumes/
diff --git a/data/6_storage_and_volumes/unused_images.yaml b/data/6_storage_and_volumes/unused_images.yaml
index 8a56078..82c183e 100644
--- a/data/6_storage_and_volumes/unused_images.yaml
+++ b/data/6_storage_and_volumes/unused_images.yaml
@@ -2,80 +2,80 @@ questions:
   - uuid: 3c9a20b0-4de1-4784-8e25-65bb0d92fb64
     question: Which command removes all dangling (untagged) images from the local filesystem?
     answers:
-      - { value: "docker system reset", correct: false }
-      - { value: "docker image rm --all", correct: false }
-      - { value: "docker image prune", correct: true }
-      - { value: "docker rmi --dangling", correct: false }
+      - { value: 'docker system reset', correct: false }
+      - { value: 'docker image rm --all', correct: false }
+      - { value: 'docker image prune', correct: true }
+      - { value: 'docker rmi --dangling', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/image_prune/
 
   - uuid: 1b68a1d9-9819-41df-b48e-d9cf1c3c6b7b
     question: What option should be added to `docker image prune` to remove all unused images, not just dangling ones?
     answers:
-      - { value: "--prune-all", correct: false }
-      - { value: "--delete", correct: false }
-      - { value: "--all", correct: true }
-      - { value: "--force", correct: false }
+      - { value: '--prune-all', correct: false }
+      - { value: '--delete', correct: false }
+      - { value: '--all', correct: true }
+      - { value: '--force', correct: false }
     help: https://docs.docker.com/engine/reference/commandline/image_prune/
 
   - uuid: 2cf1c324-1633-4d6f-99b0-5a56e055fc5a
     question: Which command removes unused containers, networks, images, and optionally volumes in one step?
     answers:
-      - { value: "docker reset --all", correct: false }
-      - { value: "docker clean all", correct: false }
-      - { value: "docker gc", correct: false }
-      - { value: "docker system prune", correct: true }
+      - { value: 'docker reset --all', correct: false }
+      - { value: 'docker clean all', correct: false }
+      - { value: 'docker gc', correct: false }
+      - { value: 'docker system prune', correct: true }
     help: https://docs.docker.com/engine/reference/commandline/system_prune/
 
   - uuid: 3c8562f2-5b8f-4664-8b52-6db36b5cc9d1
     question: Which option must be added to `docker system prune` to also remove unused volumes?
     answers:
-      - { value: "--all", correct: false }
-      - { value: "--with-storage", correct: false }
-      - { value: "--delete-volumes", correct: false }
-      - { value: "--volumes", correct: true }
+      - { value: '--all', correct: false }
+      - { value: '--with-storage', correct: false }
+      - { value: '--delete-volumes', correct: false }
+      - { value: '--volumes', correct: true }
     help: https://docs.docker.com/engine/reference/commandline/system_prune/
 
   - uuid: 9b1cb29e-dce3-4930-93b3-66d214af4b4f
     question: In DTR, what is the purpose of the garbage collection process?
     answers:
-      - { value: "To remove unreferenced image layers and free storage space", correct: true }
-      - { value: "To compress registry logs", correct: false }
-      - { value: "To migrate data to UCP", correct: false }
-      - { value: "To rebuild Docker images for efficiency", correct: false }
+      - { value: 'To remove unreferenced image layers and free storage space', correct: true }
+      - { value: 'To compress registry logs', correct: false }
+      - { value: 'To migrate data to UCP', correct: false }
+      - { value: 'To rebuild Docker images for efficiency', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/dtr/admin/configure/garbage-collection.html
 
   - uuid: 52a5249e-c17b-4a0c-a8cc-df01353f964f
     question: How should garbage collection in DTR be executed to avoid service interruption?
     answers:
-      - { value: "Enable the --live-clean flag for safe cleanup", correct: false }
-      - { value: "Run it continuously in the background", correct: false }
-      - { value: "It runs automatically without admin control", correct: false }
-      - { value: "Run it during maintenance windows as it locks the registry", correct: true }
+      - { value: 'Enable the --live-clean flag for safe cleanup', correct: false }
+      - { value: 'Run it continuously in the background', correct: false }
+      - { value: 'It runs automatically without admin control', correct: false }
+      - { value: 'Run it during maintenance windows as it locks the registry', correct: true }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/dtr/admin/configure/garbage-collection.html#scheduling-garbage-collection
 
   - uuid: 07e4f8c0-bec7-496c-91b1-2190c06b7aa2
     question: What happens to images that are still tagged in repositories when garbage collection is run in DTR?
     answers:
-      - { value: "They are migrated to Docker Hub", correct: false }
-      - { value: "They are preserved, only unreferenced layers are deleted", correct: true }
-      - { value: "They are archived", correct: false }
-      - { value: "They are forcefully deleted", correct: false }
+      - { value: 'They are migrated to Docker Hub', correct: false }
+      - { value: 'They are preserved, only unreferenced layers are deleted', correct: true }
+      - { value: 'They are archived', correct: false }
+      - { value: 'They are forcefully deleted', correct: false }
     help: https://docs.mirantis.com/docker-enterprise/v3.1/dockeree-products/dtr/admin/configure/garbage-collection.html
 
   - uuid: 35ed2d8c-8e4f-4e8e-9e2e-54cfd318b3c0
     question: Which command removes all images, containers, and volumes on a Docker host regardless of use?
     answers:
-      - { value: "docker system prune -a --volumes", correct: true }
-      - { value: "docker reset system", correct: false }
-      - { value: "docker rm --everything", correct: false }
-      - { value: "docker clean all --force", correct: false }
+      - { value: 'docker system prune -a --volumes', correct: true }
+      - { value: 'docker reset system', correct: false }
+      - { value: 'docker rm --everything', correct: false }
+      - { value: 'docker clean all --force', correct: false }
     help: https://docs.docker.com/config/pruning/
 
   - uuid: c2566ec2-5dd2-4a6d-8268-97ed822a4238
     question: What is a potential risk of running `docker system prune -a` in production?
     answers:
-      - { value: "It disables networking", correct: false }
-      - { value: "It removes Docker itself", correct: false }
-      - { value: "It corrupts running containers", correct: false }
-      - { value: "It may delete images that are not currently in use but are needed later", correct: true }
+      - { value: 'It disables networking', correct: false }
+      - { value: 'It removes Docker itself', correct: false }
+      - { value: 'It corrupts running containers', correct: false }
+      - { value: 'It may delete images that are not currently in use but are needed later', correct: true }
     help: https://docs.docker.com/config/pruning/
diff --git a/data/6_storage_and_volumes/volume_cluster.yaml b/data/6_storage_and_volumes/volume_cluster.yaml
index bcdd504..6bd535c 100644
--- a/data/6_storage_and_volumes/volume_cluster.yaml
+++ b/data/6_storage_and_volumes/volume_cluster.yaml
@@ -2,71 +2,71 @@ questions:
   - uuid: 4e528eb3-9cf5-448e-8b9c-b089f6971b82
     question: In a Docker Swarm cluster, what is required for a container to access the same data across different nodes?
     answers:
-      - { value: "Manual copying of files between nodes", correct: false }
-      - { value: "The default local driver", correct: false }
-      - { value: "A volume driver or shared storage accessible to all nodes", correct: true }
-      - { value: "Overlay networking", correct: false }
+      - { value: 'Manual copying of files between nodes', correct: false }
+      - { value: 'The default local driver', correct: false }
+      - { value: 'A volume driver or shared storage accessible to all nodes', correct: true }
+      - { value: 'Overlay networking', correct: false }
     help: https://docs.docker.com/storage/volumes/
 
   - uuid: 56f40f60-f787-4f72-b041-3a3c816dc171
     question: What happens if a service using a `local` volume is rescheduled to another node in Swarm?
     answers:
-      - { value: "Swarm blocks the scheduling until storage syncs", correct: false }
-      - { value: "Docker automatically migrates the data", correct: false }
-      - { value: "The container starts, but the data will not be present on the new node", correct: true }
-      - { value: "The volume becomes globally accessible via overlay", correct: false }
+      - { value: 'Swarm blocks the scheduling until storage syncs', correct: false }
+      - { value: 'Docker automatically migrates the data', correct: false }
+      - { value: 'The container starts, but the data will not be present on the new node', correct: true }
+      - { value: 'The volume becomes globally accessible via overlay', correct: false }
     help: https://docs.docker.com/storage/volumes/#local
 
   - uuid: 6a9c5c72-d9a1-42d0-b67b-f69a3cc38bb7
     question: Which storage option is commonly used in Swarm to share data across nodes?
     answers:
-      - { value: "NFS or other shared network storage", correct: true }
-      - { value: "Bind mounts from each node’s /var directory", correct: false }
-      - { value: "Local tmpfs volumes", correct: false }
-      - { value: "Cluster gossip protocol", correct: false }
+      - { value: 'NFS or other shared network storage', correct: true }
+      - { value: 'Bind mounts from each node’s /var directory', correct: false }
+      - { value: 'Local tmpfs volumes', correct: false }
+      - { value: 'Cluster gossip protocol', correct: false }
     help: https://docs.docker.com/storage/volumes/#volume-drivers
 
   - uuid: 3d36c347-0f8e-43a5-96cb-fc90ebf4583b
     question: Which command allows specifying a volume driver when creating a service in Swarm?
     answers:
-      - { value: "docker node storage attach", correct: false }
-      - { value: "docker swarm volume add", correct: false }
-      - { value: "docker volume create --service-only", correct: false }
-      - { value: "docker service create --mount type=volume,source=data,target=/data,volume-driver=nfs", correct: true }
+      - { value: 'docker node storage attach', correct: false }
+      - { value: 'docker swarm volume add', correct: false }
+      - { value: 'docker volume create --service-only', correct: false }
+      - { value: 'docker service create --mount type=volume,source=data,target=/data,volume-driver=nfs', correct: true }
     help: https://docs.docker.com/engine/swarm/services/#attach-services-to-volumes
 
   - uuid: 1c39e967-10d5-41df-96ee-07a7cb09ee64
     question: Which Swarm feature can ensure a service using local storage always runs on the same node?
     answers:
-      - { value: "Secrets management", correct: false }
-      - { value: "Overlay networks", correct: false }
-      - { value: "Placement constraints", correct: true }
-      - { value: "Ingress routing mesh", correct: false }
+      - { value: 'Secrets management', correct: false }
+      - { value: 'Overlay networks', correct: false }
+      - { value: 'Placement constraints', correct: true }
+      - { value: 'Ingress routing mesh', correct: false }
     help: https://docs.docker.com/engine/swarm/services/#placement-constraints
 
   - uuid: 72c2b91f-97e7-45f7-b2b7-faadbbbc3d5f
     question: What is the main drawback of using bind mounts in a multi-node cluster?
     answers:
-      - { value: "They are slower than volumes", correct: false }
-      - { value: "They require Kubernetes", correct: false }
-      - { value: "Data is tied to a single node and not portable", correct: true }
-      - { value: "They cannot store persistent data", correct: false }
+      - { value: 'They are slower than volumes', correct: false }
+      - { value: 'They require Kubernetes', correct: false }
+      - { value: 'Data is tied to a single node and not portable', correct: true }
+      - { value: 'They cannot store persistent data', correct: false }
     help: https://docs.docker.com/storage/bind-mounts/
 
   - uuid: d79c6df3-64a5-41d8-9b73-67f6cf5de9d5
     question: Which type of storage is best suited for databases running in a Swarm cluster?
     answers:
-      - { value: "Anonymous tmpfs volumes", correct: false }
-      - { value: "Shared block or network-attached storage with a supported driver", correct: true }
-      - { value: "Bind mounts to /tmp", correct: false }
-      - { value: "Local temporary storage", correct: false }
+      - { value: 'Anonymous tmpfs volumes', correct: false }
+      - { value: 'Shared block or network-attached storage with a supported driver', correct: true }
+      - { value: 'Bind mounts to /tmp', correct: false }
+      - { value: 'Local temporary storage', correct: false }
     help: https://docs.docker.com/storage/volumes/#volume-drivers
 
   - uuid: 35c79892-11a0-4e40-92af-289ff9ee3d0a
     question: How does Docker Swarm handle persistent volumes by default?
     answers:
-      - { value: "They are backed up with service definitions", correct: false }
-      - { value: "They are replicated automatically to all nodes", correct: false }
-      - { value: "They are stored inside Raft logs", correct: false }
-      - { value: "They are node-specific and not replicated across the cluster", correct: true }
+      - { value: 'They are backed up with service definitions', correct: false }
+      - { value: 'They are replicated automatically to all nodes', correct: false }
+      - { value: 'They are stored inside Raft logs', correct: false }
+      - { value: 'They are node-specific and not replicated across the cluster', correct: true }
     help: https://docs.docker.com/storage/volumes/