Docker MCQs with answers Page - 10

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.
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📊 Docker
Q. What is the purpose of the 'docker exec' command?
  • (A) To execute a command inside a running container
  • (B) To create a new Docker container
  • (C) To remove a container
  • (D) To build a Docker image
💬 Discuss
✅ Correct Answer: (A) To execute a command inside a running container

Explanation: The 'docker exec' command is used to execute a command inside a running Docker container.

📊 Docker
Q. What is the difference between 'docker stop' and 'docker kill'?
  • (A) docker stop terminates containers immediately, docker kill gracefully stops them
  • (B) docker stop sends a SIGTERM signal, docker kill sends SIGKILL
  • (C) docker stop is for containers, docker kill is for images
  • (D) docker stop is a safer method, docker kill is faster
💬 Discuss
✅ Correct Answer: (B) docker stop sends a SIGTERM signal, docker kill sends SIGKILL

Explanation: 'docker stop' sends a SIGTERM signal to gracefully stop a container, while 'docker kill' sends a SIGKILL signal to forcefully stop it.

📊 Docker
Q. Which of the following is a valid option for the 'docker run' command?
  • (A) -name
  • (B) -d
  • (C) --execute
  • (D) --detach
💬 Discuss
✅ Correct Answer: (B) -d

Explanation: The '-d' flag is used with 'docker run' to run the container in detached mode.

📊 Docker
Q. What is the default network driver used by Docker?
  • (A) bridge
  • (B) host
  • (C) overlay
  • (D) macvlan
💬 Discuss
✅ Correct Answer: (A) bridge

Explanation: The default network driver used by Docker is 'bridge', which creates a private internal network.

📊 Docker
Q. Which of the following commands creates a Docker container from an image?
  • (A) docker run
  • (B) docker create
  • (C) docker build
  • (D) docker start
💬 Discuss
✅ Correct Answer: (A) docker run

Explanation: The 'docker run' command is used to create and start a container from an image.

📊 Docker
Q. What command would you use to remove a Docker image?
  • (A) docker rm image_name
  • (B) docker rmi image_name
  • (C) docker image rm image_name
  • (D) docker remove image_name
💬 Discuss
✅ Correct Answer: (B) docker rmi image_name

Explanation: The 'docker rmi' command is used to remove a Docker image from the local machine.

📊 Docker
Q. Which command is used to build a Docker image from a Dockerfile?
  • (A) docker create
  • (B) docker build
  • (C) docker run
  • (D) docker compose
💬 Discuss
✅ Correct Answer: (B) docker build

Explanation: The 'docker build' command is used to build a Docker image from a Dockerfile and a context (usually the current directory).

📊 Docker
Q. What is the default network driver used by Docker?
  • (A) host
  • (B) bridge
  • (C) overlay
  • (D) macvlan
💬 Discuss
✅ Correct Answer: (B) bridge

Explanation: The default network driver in Docker is 'bridge', which creates a private internal network for containers to communicate.

📊 Docker
Q. Which command is used to list all running Docker containers?
  • (A) docker ps
  • (B) docker ls
  • (C) docker list
  • (D) docker containers
💬 Discuss
✅ Correct Answer: (A) docker ps

Explanation: The 'docker ps' command lists all running containers. To list all containers (including stopped ones), use 'docker ps -a'.

📊 Docker
Q. What is the purpose of a Dockerfile?
  • (A) To define the runtime environment for a container
  • (B) To manage Docker volumes
  • (C) To configure Docker networks
  • (D) To monitor Docker containers
💬 Discuss
✅ Correct Answer: (A) To define the runtime environment for a container

Explanation: A Dockerfile is a text document that contains instructions to build a Docker image, defining the runtime environment for a container.

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