Docker Quiz Test Online (30 random Questions) 2025

This quick 45-minute challenge consists of 30 random multiple-choice questions that test your knowledge across various Docker topics, including the introduction to Docker, installation procedures, Docker images and containers, networking, Docker Compose, advanced concepts, deployment in production, security, and integration with CI/CD pipelines. Whether you’re a beginner or have some experience, this quiz is designed to enhance your understanding of Docker’s capabilities in modern software development.

0 votes, 0 avg

You have 45 minutes to complete the quiz. The timer will start when you click the 'Start Quiz' button. Please ensure you are ready before beginning.

Time is up! Your quiz has ended. Your responses have been submitted automatically.

45 Minutes Docker Quiz Test Online

Welcome to the Docker Quiz! This quick 45-minute challenge consists of 30 random multiple-choice questions that test your knowledge across various Docker topics, including the introduction to Docker, installation procedures, Docker images and containers, networking, Docker Compose, advanced concepts, deployment in production, security, and integration with CI/CD pipelines. Whether you're a beginner or have some experience, this quiz is designed to enhance your understanding of Docker's capabilities in modern software development.

1 / 30

1. Which of the following is NOT an advantage of Docker Compose?

A) Manages container dependencies automatically

B) Allows easy scaling of services

C) Simplifies multi-container setup

D) Provides built-in monitoring and alerting

2 / 30

2. What does a Docker image contain?

A) Only the application code

B) The runtime environment but not the code

C) Only configuration files

D) The application, its dependencies, and configuration

3 / 30

3. Which command removes all unused Docker images?

A) docker prune

B) docker system prune

C) docker clean

D) docker rmi

4 / 30

4. What does Docker use to optimize image layers?

A) Layer caching

B) Volume mapping

C) Virtual memory

D) Hypervisor technology

5 / 30

5. What is the base image in Docker?

A) The default image used for all containers

B) A custom-built image from scratch

C) An empty Docker container

D) The first layer of any Docker image

6 / 30

6. How do you tag a Docker image during the build process?

A) By using the -t flag

B) By using the -name flag

C) By using the --image flag

D) By renaming the Dockerfile

7 / 30

7. What is a multi-stage build in Docker?

A) Running multiple containers in parallel

B) Optimizing Docker images by using intermediate stages to reduce image size

C) Using multiple base images in a single Dockerfile

D) Building multiple containers simultaneously

8 / 30

8. Which tool is commonly used for monitoring Docker containers in production?

A) Ansible

B) Prometheus

C) Jenkins

D) Terraform

9 / 30

9. How do you attach to a running container?

A) docker exec -it <container-id>

B) docker join <container-id>

C) docker connect <container-id>

D) docker attach <container-id>

10 / 30

10. Which of the following is required to install Docker on Linux?

A) A pre-installed Docker registry

B) A Linux distribution with kernel version 3.10 or higher

C) An active Docker subscription

D) A system with a hypervisor

11 / 30

11. What is the minimum required version of Windows 10 to install Docker Desktop?

A) Version 1709

B) Version 1803

C) Version 1903

D) Version 2004

12 / 30

12. What is the purpose of the docker-compose plugin during installation?

A) To debug Docker containers

B) To manage single-container applications

C) To update Docker images

D) To manage multi-container applications

13 / 30

13. What happens if you try to remove a running container?

A) Docker throws an error.

B) The container is forcefully stopped and removed.

C) Docker archives the container.

D) The container is removed without stopping it.

14 / 30

14. What is Docker Compose used for?

A) Managing container networking

B) Debugging Docker containers

C) Building Docker images

D) Defining and running multi-container Docker applications

15 / 30

15. What happens to a container if it is stopped and not removed?

A) It cannot be restarted.

B) It is moved to an archive.

C) It is automatically deleted.

D) It remains on the system and can be restarted.

16 / 30

16. What does the --no-cache flag do during docker build?

A) Builds without using cached layers

B) Skips Dockerfile validation

C) Disables multi-stage builds

D) Cleans up image cache after building

17 / 30

17. What is the function of Docker Healthchecks?

A) To check Docker daemon status

B) To enforce network security policies

C) To validate container readiness and health

D) To monitor CPU and memory usage

18 / 30

18. Which command is commonly used to build a Docker image in a CI/CD pipeline?

A) docker run

B) docker ps

C) docker build

D) docker pull

19 / 30

19. What is the main advantage of Docker?

A) Better database management

B) Enhanced hardware performance

C) Faster development cycles

D) Improved debugging tools

20 / 30

20. How do you view the layers of a Docker image?

A) docker layers

B) docker logs

C) docker history

D) docker inspect

21 / 30

21. Which command shows the IP address of a running container?

A) docker ip

B) docker ps --ip

C) docker inspect

D) docker info

22 / 30

22. Which feature in Docker provides secure image signing and verification?

A) Docker Security Scanner

B) Content Trust

C) Docker Shield

D) Image Lock

23 / 30

23. What does the docker-compose up command do in a CI/CD process?

A) Stops all running containers

B) Starts and runs all services defined in a Compose file

C) Pulls images from the Docker registry

D) Builds Docker images only

24 / 30

24. Which network driver disables all networking for a container?

A) Overlay

B) Bridge

C) None

D) Host

25 / 30

25. How do you list all containers, including stopped ones?

A) docker ps

B) docker list --all

C) docker containers

D) docker ps -a

26 / 30

26. What is the difference between a Docker image and a container?

A) A container is a running instance of an image

B) An image is a running instance of a container

C) Images store logs, while containers run processes

D) Containers and images are the same

27 / 30

27. Which tool is used to resolve container names to IP addresses in Docker?

A) Docker DNS

B) DNS server

C) Bridge resolver

D) Network manager

28 / 30

28. Which of the following is NOT an advantage of multi-stage builds?

A) Improves build performance

B) Simplifies build pipelines

C) Reduces the final image size

D) Enables real-time container monitoring

29 / 30

29. What file is used to build a Docker image?

A) DockerConfig.json

B) ImageConfig

C) Dockerfile

D) ImageBuilder

30 / 30

30. Who is the founder of Docker?

A) Kelsey Hightower

B) Solomon Hykes

C) Linus Torvalds

D) Brendan Burns

Your score is

The average score is 63%

Rate Your Experience!

Anonymous feedback

Thank you for your feedback! We appreciate your input.

JavaScript Quiz Test Online (30 Questions)

JSON Quiz Test Online (30 random Questions)

HTML Quiz Test Online

10 Minutes Docker Quiz Test Online

10 Minutes JavaScript Quiz Test Online

10 Minutes Bootstrap Quiz Test Online

Related