Docker Secrets MCQs with answers Page - 6

You will find multiple-choice questions (MCQs) related to #Docker Secrets here. Go through these questions to prepare effectively for your upcoming exams and interviews.

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A

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Q. Can you update a Docker secret directly?

  • (A) Yes, with docker secret update
  • (B) No, you must delete and recreate it
  • (C) Yes, using docker secret patch
  • (D) Yes, by editing the mounted file

A

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Q. What is a major security benefit of Docker secrets?

  • (A) They are encrypted and never exposed as env vars
  • (B) They are visible in container logs
  • (C) They are cached on disk for speed
  • (D) They are encoded in base64

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Q. Can Docker secrets be used outside of Swarm mode?

  • (A) Yes, always
  • (B) No
  • (C) Only with Kubernetes
  • (D) Only with Docker Desktop

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Q. How are secrets transmitted between manager and worker nodes?

  • (A) Plain text
  • (B) Base64 encoded
  • (C) Encrypted over TLS
  • (D) Using UDP broadcast

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Q. Can a secret be mounted to multiple containers in a service?

  • (A) Yes
  • (B) No
  • (C) Only with Compose v2
  • (D) Only on worker nodes

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Q. Which Compose file version supports Docker secrets?

  • (A) 2
  • (B) 2.1
  • (C) 3.1 and above
  • (D) All versions

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Q. What is required to use secrets in a Compose file?

  • (A) Define secrets in the file and mark external: true
  • (B) Set secret=true in environment
  • (C) Define them as environment variables
  • (D) Create secret in the container first

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Q. What is a potential risk of using environment variables instead of secrets?

  • (A) They are stored encrypted
  • (B) They are not available inside containers
  • (C) They can be seen in process lists or logs
  • (D) They are too complex to implement

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Q. How do you inspect a Docker secret’s metadata?

  • (A) docker inspect secret <name>
  • (B) docker secret inspect <name>
  • (C) docker secret show <name>
  • (D) docker view secret <name>

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Q. Can secrets be shared across services?

  • (A) Yes, if explicitly assigned
  • (B) No
  • (C) Only with external config
  • (D) Only with shared volumes

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