Docker Online Quiz

Welcome to our Docker quiz for beginners! Docker is a powerful tool for creating, deploying, and running applications by using containers. This quiz contains 25 multiple-choice questions designed to test your basic understanding of Docker and its core concepts, including images, containers, Dockerfiles, and Docker Hub. Whether you're new to Docker or looking to solidify your understanding, this quiz is a great way to assess your knowledge and learn more about Docker’s capabilities.

1. What is Docker?

a) A type of virtual machine

b) A containerization platform

c) A web hosting service

d) A programming language

2. What is a Docker container?

a) A lightweight virtual machine

b) A packaged Docker application

c) A type of Docker image

d) A live running environment of an application

3. What is the purpose of a Docker image?

a) To store data permanently

b) To update Docker software

c) To serve as the executable package of an application

d) To provide a backup service

4. What file is used to define a Docker image?

a) Dockerfile

b) Dockerimage.txt

c) Imagefile

d) Dockerconfig.sys

5. How do you create a Docker image?

a) docker create

b) docker build

c) docker compile

d) docker make

6. Where can Docker images be stored?

a) In the Dockerfile

b) On the local machine

c) In Docker Hub or other Docker registries

d) Inside other Docker containers

7. What command is used to run a Docker container?

a) docker start

b) docker run

c) docker execute

d) docker open

8. What is Docker Hub?

a) A tool for creating Docker images

b) Docker's official registry service

c) A container management service

d) A type of virtual network

9. How can Docker containers communicate with each other?

a) Through shared volumes

b) Using Docker Compose

c) By using Docker networking features

d) They cannot communicate

10. What is the default network mode for a Docker container?

a) bridge

b) host

c) none

d) nat

11. How do you stop a running Docker container?

a) docker stop

b) docker kill

c) docker pause

d) docker shutdown

12. What does Docker Compose do?

a) Manages the build process of Docker images

b) Provides high availability for Docker containers

c) Runs single-container Docker applications

d) Defines and runs multi-container Docker applications

13. What is the main benefit of using Docker?

a) Faster Internet speeds

b) Reduced IT costs

c) Platform independence and quick deployments

d) Increased data storage capacity

14. What does the docker ps command do?

a) Shows all available Docker images

b) Lists all running Docker containers

c) Permanently stores data in Docker containers

d) Publishes application updates

15. How do Docker volumes work?

a) They increase the processing power of containers.

b) They connect containers directly to Docker Hub.

c) They persist data generated and used by Docker containers.

d) They reduce the memory usage of containers.

16. What is the purpose of the Docker daemon?

a) To execute high-level Docker commands

b) To build Docker images

c) To handle all operations, such as building, running, and distributing Docker containers

d) To monitor the performance of Docker containers

17. How is Docker different from a virtual machine?

a) Docker is slower than a virtual machine.

b) Docker containers share the host system’s kernel, while virtual machines do not.

c) Docker requires more system resources.

d) Docker can only run on Linux.

18. What does the docker pull command do?

a) Sends a new Docker image to Docker Hub

b) Downloads a Docker image from Docker Hub to your local machine

c) Updates Docker to the latest version

d) Pulls data from a running container

19. What can Docker services be used for in a swarm?

a) To balance loads across containers

b) To monitor container performance

c) To define tasks that should be executed by containers

d) To replicate containers across different environments

20. What is the main advantage of Docker Swarm?

a) Automated container backups

b) Integrated code compilation tools

c) Native clustering and load balancing

d) Built-in antivirus protection

21. What is Dockerfile used for?

a) To execute interactive commands in Docker

b) To define the environment settings of a container

c) To automate the creation of Docker images

d) To manage container versions

22. What is the main purpose of the docker inspect command?

a) To modify the configuration of a container

b) To inspect the details of Docker objects such as containers, images, or volumes

c) To enhance the security settings of a container

d) To inspect the network traffic of Docker

23. How can Docker improve the development process for teams?

a) By providing team management tools

b) By ensuring that applications run the same in different environments

c) By automatically writing code

d) By offering direct programming assistance

24. What does the docker logs command do?

a) Deletes logs to free up space

b) Retrieves the logs of a running container

c) Configures logging drivers

d) Backs up container data

25. What is the benefit of Docker networking?

a) It speeds up the Internet.

b) It connects Docker containers to each other and to the host, allowing them to communicate.

c) It encrypts data sent by containers.

d) It reduces the number of containers needed.