Docker MCQ Questions with answers and solutions Page 25

Q. Which command is used to start a container in the background?

(A) docker start -d container_name
(B) docker run -d container_name
(C) docker start container_name
(D) docker exec -d container_name

💬 Discuss

✅ Correct Answer: (B) docker run -d container_name

Explanation: 'docker run -d container_name' starts a container in detached mode (background).

Published by Priyanka Tomar ⭐ 35.28K Points at 13-Feb-2025 10:08 pm in Docker

Q. Which of the following commands is used to create a new Docker network?

(A) docker network create network_name
(B) docker network add network_name
(C) docker create network network_name
(D) docker network init network_name

💬 Discuss

✅ Correct Answer: (A) docker network create network_name

Explanation: 'docker network create network_name' is used to create a new Docker network.

Published by Praveen Singh ⭐ 36.81K Points at 13-Feb-2025 10:08 pm in Docker

Q. Which of the following is NOT a type of Docker network driver?

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

💬 Discuss

✅ Correct Answer: (D) cloud

Explanation: There is no 'cloud' network driver in Docker. 'bridge', 'host', and 'overlay' are valid network drivers.

Published by Admin ⭐ 38.37K Points at 13-Feb-2025 10:08 pm in Docker

Q. Which of the following command removes all unused images, containers, and networks?

(A) docker prune all
(B) docker system prune
(C) docker cleanup
(D) docker delete unused

💬 Discuss

✅ Correct Answer: (B) docker system prune

Explanation: 'docker system prune' removes all unused images, containers, networks, and optionally volumes.

Published by Gopal Sharma ⭐ 38.32K Points at 13-Feb-2025 10:08 pm in Docker

Q. What is the purpose of the 'docker-compose.yml' file?

(A) To define a set of Docker containers and services for an application
(B) To define a Docker network
(C) To configure Docker host settings
(D) To store Docker logs

💬 Discuss

✅ Correct Answer: (A) To define a set of Docker containers and services for an application

Explanation: 'docker-compose.yml' defines the configuration for a multi-container Docker application, including services, networks, and volumes.

Published by Ram Sharma ⭐ 193.88K Points at 13-Feb-2025 10:08 pm in Docker

Q. Which of the following Docker commands is used to build an image from a Dockerfile?

(A) docker create image
(B) docker build -t image_name .
(C) docker make image image_name
(D) docker image build -t image_name .

💬 Discuss

✅ Correct Answer: (B) docker build -t image_name .

Explanation: 'docker build -t image_name .' is the command to build an image from a Dockerfile in the current directory.

Published by Vikash Gupta ⭐ 33.56K Points at 13-Feb-2025 10:08 pm in Docker

Q. Which of the following is a command to list all running containers in Docker?

(A) docker list running
(B) docker ps
(C) docker containers list
(D) docker status

💬 Discuss

✅ Correct Answer: (B) docker ps

Explanation: 'docker ps' lists all the running containers.

Published by Praveen Singh ⭐ 36.81K Points at 13-Feb-2025 10:08 pm in Docker

Q. Which of the following is used to allocate a specific amount of CPU to a Docker container?

(A) --cpu-shares
(B) --memory
(C) --cpu-limit
(D) --cpus

💬 Discuss

✅ Correct Answer: (A) --cpu-shares

Explanation: '--cpu-shares' is used to set CPU shares for a container in Docker.

Published by Shiva Ram ⭐ 30.44K Points at 13-Feb-2025 10:08 pm in Docker

Q. Which of the following is the correct way to expose a Docker container’s port to the host?

(A) docker run -p 8080:80 container_name
(B) docker run --port 8080:80 container_name
(C) docker expose -p 8080:80 container_name
(D) docker bind 8080:80 container_name

💬 Discuss

✅ Correct Answer: (A) docker run -p 8080:80 container_name

Explanation: 'docker run -p 8080:80 container_name' is the correct command to expose a port from the container to the host.

Published by Gopal Sharma ⭐ 38.32K Points at 13-Feb-2025 10:08 pm in Docker

Q. Which of the following is true about Docker containers?

(A) Containers are lightweight and run directly on the host OS without the need for a guest OS
(B) Containers require a virtual machine to run
(C) Containers are virtual machines
(D) Containers are slower than virtual machines

💬 Discuss

✅ Correct Answer: (A) Containers are lightweight and run directly on the host OS without the need for a guest OS

Explanation: Docker containers are lightweight and run directly on the host OS, sharing its kernel.

Published by Shiva Ram ⭐ 30.44K Points at 13-Feb-2025 10:08 pm in Docker

Docker MCQs with answers Page - 25

Q. Which command is used to start a container in the background?

Q. Which of the following commands is used to create a new Docker network?

Q. Which of the following is NOT a type of Docker network driver?

Q. Which of the following command removes all unused images, containers, and networks?

Q. What is the purpose of the 'docker-compose.yml' file?

Q. Which of the following Docker commands is used to build an image from a Dockerfile?

Q. Which of the following is a command to list all running containers in Docker?

Q. Which of the following is used to allocate a specific amount of CPU to a Docker container?

Q. Which of the following is the correct way to expose a Docker container’s port to the host?

Q. Which of the following is true about Docker containers?

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