Docker MCQ Questions with answers and solutions Page 39

Q. Which of the following is a valid way to mount a volume inside a container?

(A) docker run -v /app:/data nginx
(B) docker run nginx:/data /app
(C) docker mount /data:/app nginx
(D) docker start -mount /app:/data nginx

💬 Discuss

✅ Correct Answer: (A) docker run -v /app:/data nginx

Explanation: The `-v` or `--mount` flags are used to mount volumes.

Published by Mr. Dubey ⭐ 111.54K Points at 24-Jul-2025 07:13 am in Docker

Q. What happens when you remove a container using a volume?

(A) The volume is automatically deleted
(B) Only the container is deleted, volume persists
(C) Both are deleted
(D) Nothing happens

💬 Discuss

✅ Correct Answer: (B) Only the container is deleted, volume persists

Explanation: Volumes are not deleted when a container is removed unless specified using `--volumes`.

Published by Mr. Dubey ⭐ 111.54K Points at 24-Jul-2025 07:13 am in Docker

Q. Which flag is used to mount volumes using long syntax in `docker run`?

(A) --add
(B) --mount
(C) --use
(D) --volume

💬 Discuss

✅ Correct Answer: (B) --mount

Explanation: `--mount` provides a clearer and more flexible syntax for mounting volumes compared to `-v`.

Published by Mr. Dubey ⭐ 111.54K Points at 24-Jul-2025 07:13 am in Docker

Q. Which type of volume is managed by Docker and stored in the Docker directory?

(A) Host bind mount
(B) Named volume
(C) Anonymous volume
(D) Shared volume

💬 Discuss

✅ Correct Answer: (B) Named volume

Explanation: Named volumes are created and managed by Docker and stored in `/var/lib/docker/volumes/`.

Published by Mr. Dubey ⭐ 111.54K Points at 24-Jul-2025 07:13 am in Docker

Q. Which of the following is a difference between a bind mount and a named volume?

(A) Bind mounts are stored in memory
(B) Named volumes are more portable and safer to share
(C) Named volumes require root access
(D) Bind mounts are encrypted by default

💬 Discuss

✅ Correct Answer: (B) Named volumes are more portable and safer to share

Explanation: Named volumes are managed by Docker and are more suitable for sharing between containers.

Published by Mr. Dubey ⭐ 111.54K Points at 24-Jul-2025 07:13 am in Docker

Q. Which command removes all unused volumes?

(A) docker volume clear
(B) docker volume flush
(C) docker volume prune
(D) docker volume clean

💬 Discuss

✅ Correct Answer: (C) docker volume prune

Explanation: `docker volume prune` removes all unused volumes to free up space.

Published by Mr. Dubey ⭐ 111.54K Points at 24-Jul-2025 07:13 am in Docker

Q. What type of volume is created when no name is specified in `docker run -v /data`?

(A) Named volume
(B) Temporary volume
(C) Anonymous volume
(D) Manual volume

💬 Discuss

✅ Correct Answer: (C) Anonymous volume

Explanation: If no name is given, Docker creates an anonymous volume automatically.

Published by Mr. Dubey ⭐ 111.54K Points at 24-Jul-2025 07:13 am in Docker

Q. Which is the default network driver in Docker?

(A) host
(B) bridge
(C) overlay
(D) macvlan

💬 Discuss

✅ Correct Answer: (B) bridge

Explanation: Docker uses the 'bridge' driver as the default network driver for standalone containers.

Published by Mr. Dubey ⭐ 111.54K Points at 24-Jul-2025 07:14 am in Docker

Q. Which Docker network driver allows containers on the same host to communicate?

(A) overlay
(B) host
(C) bridge
(D) none

💬 Discuss

✅ Correct Answer: (C) bridge

Explanation: The 'bridge' network driver creates a private network that allows containers on the same host to communicate.

Published by Mr. Dubey ⭐ 111.54K Points at 24-Jul-2025 07:14 am in Docker

Q. What does the 'host' network driver do in Docker?

(A) Assigns a random port
(B) Isolates container from the host
(C) Removes networking capabilities
(D) Uses the host's network stack directly

💬 Discuss

✅ Correct Answer: (D) Uses the host's network stack directly

Explanation: With the 'host' driver, the container shares the host's network stack.

Published by Mr. Dubey ⭐ 111.54K Points at 24-Jul-2025 07:14 am in Docker

Docker MCQs with answers Page - 39

Q. Which of the following is a valid way to mount a volume inside a container?

Q. What happens when you remove a container using a volume?

Q. Which flag is used to mount volumes using long syntax in `docker run`?

Q. Which type of volume is managed by Docker and stored in the Docker directory?

Q. Which of the following is a difference between a bind mount and a named volume?

Q. Which command removes all unused volumes?

Q. What type of volume is created when no name is specified in `docker run -v /data`?

Q. Which is the default network driver in Docker?

Q. Which Docker network driver allows containers on the same host to communicate?

Q. What does the 'host' network driver do in Docker?

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