Docker MCQs with answers Page - 54

Dear candidates you will find MCQ questions of Docker here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.
Share your questions by clicking Add Question

📊 Docker
Q. How do you create a Docker config?
  • (A) docker config create <name> <file>
  • (B) docker config add <name> <value>
  • (C) docker create config <name> <file>
  • (D) docker-compose config create <name> <file>
💬 Discuss
✅ Correct Answer: (A) docker config create <name> <file>

Explanation: The correct syntax to create a Docker config is `docker config create <name> <file>`.

📊 Docker
Q. Can Docker configs be updated after being attached to a service?
  • (A) Yes, they update automatically
  • (B) No, they are immutable
  • (C) Yes, using docker config update
  • (D) Yes, if the container is restarted
💬 Discuss
✅ Correct Answer: (B) No, they are immutable

Explanation: Docker configs are immutable. To change a config, you must create a new one and update the service.

📊 Docker
Q. Which command lists all Docker configs?
  • (A) docker config ls
  • (B) docker config list
  • (C) docker list configs
  • (D) docker configs show
💬 Discuss
✅ Correct Answer: (A) docker config ls

Explanation: `docker config ls` lists all available configs.

📊 Docker
Q. What is the difference between Docker secrets and Docker configs?
  • (A) Configs are for sensitive data, secrets are not
  • (B) Secrets are versioned, configs are not
  • (C) Secrets are encrypted, configs are not
  • (D) There is no difference
💬 Discuss
✅ Correct Answer: (C) Secrets are encrypted, configs are not

Explanation: Secrets are encrypted and stored securely; configs are used for non-sensitive data and are not encrypted.

📊 Docker
Q. Which of the following is true about configs and services?
  • (A) Configs must be manually copied into containers
  • (B) Configs are accessible via environment variables
  • (C) Configs can be mounted as files in the container
  • (D) Configs can only be used with Docker volumes
💬 Discuss
✅ Correct Answer: (C) Configs can be mounted as files in the container

Explanation: Docker mounts configs as files in the container at runtime.

📊 Docker
Q. What happens if a service is updated with a new config?
  • (A) The config is merged with the old one
  • (B) The old config is modified
  • (C) The old config is deleted
  • (D) A new config must be created and the service updated
💬 Discuss
✅ Correct Answer: (D) A new config must be created and the service updated

Explanation: Configs are immutable; to update, a new config must be created and attached to the service.

📊 Docker
Q. Which of the following file types is commonly stored in Docker configs?
  • (A) .zip
  • (B) .tar.gz
  • (C) .conf
  • (D) .pem
💬 Discuss
✅ Correct Answer: (C) .conf

Explanation: Docker configs are typically used to store plain-text config files such as `.conf`, `.json`, etc.

📊 Docker
Q. What does the command `docker config inspect <config_name>` do?
  • (A) Edits the config
  • (B) Deletes the config
  • (C) Displays the config metadata and content
  • (D) Downloads the config
💬 Discuss
✅ Correct Answer: (C) Displays the config metadata and content

Explanation: `docker config inspect` shows metadata and optionally the content of the specified config.

📊 Docker
Q. Which option is required when using configs in `docker service create`?
  • (A) --env
  • (B) --mount
  • (C) --config
  • (D) --volume
💬 Discuss
✅ Correct Answer: (C) --config

Explanation: To use configs with services, the `--config` flag is used during `docker service create`.

📊 Docker
Q. Docker configs are best suited for which of the following?
  • (A) Storing database passwords
  • (B) Logging configuration files
  • (C) Mounting persistent data volumes
  • (D) Container runtime settings
💬 Discuss
✅ Correct Answer: (B) Logging configuration files

Explanation: Configs are suitable for storing non-sensitive files like logging or application configuration files.

Programming Categories

📱 Download Our App

Learn MCQs on the go with our easy-to-use Android app

Get it on Google Play