Docker Essentials

Overview

Rewards

FAQs

Overview

As the world embraces microservices, Docker stands as a pioneer in the containerization industry. It is immutable, cost-effective, and contains all dependencies. It is also very easy to deploy and hence gives you the flexibility to build your application anywhere and deploy them anywhere.

Take this Docker Essential assessment, to know where do you stand in the emerging cloud-native domain and earn Rewards. Click Rewards tab for eligibility requirements.

Read FAQs tab carefully for Instructions before beginning the assessment.

Rewards

NYXPoints are used to generate the Leaderboard (coming soon). They are awarded for achieving a certain score.

200 nyxpoints for a passing score of 80% or more
300 nyxpoints for a perfect score of 100%
Didn’t pass? You still get 30 nyxpoints for attempting the assesment

FAQs

IMPORTANT instructions for taking the Assessment

The timer starts when you click Start Assessment
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General

There are NO pre-requisites to take this assessment. Take this assessment even if you are completely new to Linux.
The assessment is completely FREE.
Preferably take it in a closed book mode.
DO NOT copy/paste, share or upload questions elsewhere.

Eligible Rewards

300 NyxCoins*

* NyxCoins vary on score

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Current
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Question 1 of 30

1. Question
What is a container?
- A virtual machine
- A full-blown Operating System
- Collection of Filesystems
- An isolated user-space instance
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Incorrect
Question 2 of 30

2. Question
OCI Stands for Open Container Initiative?
- True
- False
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Question 3 of 30

3. Question
Which of the following is not a part of Docker ecosystem?
- containerd
- runc
- docker-lxc
- docker-init
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Question 4 of 30

4. Question
How does Docker CLI interact with Docker Daemon?
- via REST API’s
- IPC communication
- Using 2323 UDP port
- None of the Above
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Question 5 of 30

5. Question
What is cgroups used for?
- For container isolation
- Process isolation
- Limit the resources within a container
- All of the above
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Question 6 of 30

6. Question
Which command in docker provides system wide docker information?
- docker status
- docker system info
- docker status
- docker top
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Question 7 of 30

7. Question
Which is the default home directory for Docker?
- /var/lib/docker
- /var/log/docker
- /etc/docker
- /home/docker
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Question 8 of 30

8. Question
Which command will remove the container once the container is being stopped?
- docker container run -itd –net –name=test httpd
- docker container run -itd –delete –name=test httpd
- docker container create -itd –rm –name=test httpd
- None of the Above
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Question 9 of 30

9. Question
Which output does docker inspect show by default?
- JSON
- YAML
- XML
- RUBY Blocks
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Question 10 of 30

10. Question
Which of the following will list the volumes associated with a specific container?
- docker container inspect <container-name>
- docker volume inspect <container-name>
- docker volume inspect <volume-name>
- docker info
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Question 11 of 30

11. Question
A container has been created by running “docker container run -it ubuntu:latest”, at the container prompt a user typed “exit”, what will happen to the container?
- Container process will go at the background and there will be no impact on the container state
- Container will stop as exit will kill the process running inside a container (which is just a single process /bin/bash in case of Ubuntu Image)
- Typing exit will throw an error
- You will just come out of the container shell
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Question 12 of 30

12. Question
Which option with “docker container run” will help users to set a container name?
- –name
- –hostname
- –containername
- Docker just allows random names
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Question 13 of 30

13. Question
Which escape sequence will bring you out without stopping a container from the container shell?
- Control+c
- Control+d
- Control+q
- Control+pq
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Question 14 of 30

14. Question
Which is the recommended way to remove a container?
- Stop and Remove
- Remove with force
- Always use –rm while container creation
- Container will automatically be removed after 30 days
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Question 15 of 30

15. Question
Which command interactively monitors all container activities in the Docker Engine?
- Docker system events
- Docker system logs
- Docker system info
- Docker system messages
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Question 16 of 30

16. Question
Docker will associate a random container name during container creation if no name is provided at container creation time?
- True
- False
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Question 17 of 30

17. Question
How to stop all running containers in a single go?
- docker stop all
- docker container stop all
- docker container stop $(docker container ps -q)
- docker container stop
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Question 18 of 30

18. Question
Which command will remove an image?
- docker image delete
- docker delete image
- docker image rm
- docker remove image
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Question 19 of 30

19. Question
Each container in Docker shares a common writable layer?
- True
- False
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Question 20 of 30

20. Question
Which command will help users to display layers of a Docker Image?
- docker history
- docker info
- docker inspect image-id
- docker system
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Question 21 of 30

21. Question
Pick the correct command to list the available local images?
- docker image ps
- docker image ls
- docker image show
- docker image run
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Question 22 of 30

22. Question
What all information is required by docker to push an image?
- Registry and Image:Tag
- Registry, Repository and Image:Tag
- Registry and Repository
- Repository and Image:Tag
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Question 23 of 30

23. Question
Which command will upload an image into the registry?
- docker pull
- docker commit
- docker images
- docker push
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Question 24 of 30

24. Question
Dockerfile consists of?
- Instructions
- Arguments
- Instructions and Arguments
- Nothing
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Question 25 of 30

25. Question
Docker images are layered structured and at a broader level, each layer is an instruction mentioned in the Docker file?
- True
- False
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Question 26 of 30

26. Question
which Docker command will create an image from a running container?
- docker container commit
- docker container export
- docker container diff
- docker container save
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Question 27 of 30

27. Question
Can we configure a “Container Registry” on-premise for private use?
- True
- False
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Question 28 of 30

28. Question
It’s a good practice to have multiple CMD instructions in a dockerfile?
- True
- False
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Question 29 of 30

29. Question
What docker command will display detailed information about docker networks?
- docker network inspect
- docker network ls
- docker network connect
- docker network status
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Question 30 of 30

30. Question
Which command in docker will remove all stopped or unused docker objects?
- docker system prune
- docker prune
- docker container prune
- docker image prune
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