Docker Swarm

Overview

Rewards

FAQs

Overview

Docker Swarm is a small-scale management tool that provides a good orchestration system for Dockerized applications. Docker Swarm turns a pool of Docker hosts into a single virtual server allowing clustering with the built-in Swarm orchestration. In essence, we can utilize the Docker Swarm model to efficiently deploy, manage, and scale a cluster of nodes on Docker.

Take our Docker Swarm assessment to know how good you are with one of the best orchestration tool for Dockerized applications and earn rewards.

Click the 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

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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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Question 1 of 30

1. Question
Which command will set up a swarm cluster?
- docker swarm init
- docker service init
- docker swarm create
- docker service create
Correct

Incorrect
Question 2 of 30

2. Question
What is an accurate order to perform a backup of Docker EE components?
- Backup DTR, Swarm config followed by UCP
- Backup only, Swarm config and DTR
- Backup, Swarm config, UCP followed by DTR
- Any order will work
Correct

Incorrect
Question 3 of 30

3. Question
Which is the suggested and recommended approach to set storage drivers in docker?
- Use ‐‐storage-drive option with docker run
- Use ‐‐storage-driver with dockerd
- Amend “storage-driver” in the daemon.json file
- Use only -v option with docker run which will automatically set the storage driver
Correct

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Question 4 of 30

4. Question
Which command will add a new node to a swarm cluster?
- docker swarm join
- docker cluster join
- docker add node
- docker join node
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Question 5 of 30

5. Question
Which of the following is the correct docker command to enable auto lock on a Docker swarm cluster?
- docker swarm update ‐‐autolock=true
- docker swarm ‐‐autolock=true
- docker update ‐‐autolock=true
- This is not possible
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Question 6 of 30

6. Question
What are the types of services docker swarm has?
- Local and Global
- Replicated and Global
- Replicated and Local
- All of the above
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Question 7 of 30

7. Question
How to scale a few replicas in Docker?
- docker service plus
- docker service scale
- docker service up
- docker service replicate
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Question 8 of 30

8. Question
Which of the below command is useful to find out the space utilization used by docker objects like images, containers and volumes?
- docker info
- docker system df
- docker top
- docker stats
Correct

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Question 9 of 30

9. Question
Identify a command to update an existing docker service.
- docker service change
- docker service modify
- docker service update
- docker service add
Correct

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Question 10 of 30

10. Question
Which of the following commands will ensure that overlay traffic between service tasks is encrypted?
- docker service create – -network <network-name> – -secure <service-name>
- docker network create -d overlay – -secure <network-name>
- docker network create -d overlay -o encrypted=true <network-name>
- docker service create – -network <network-name> – -encrypted <service-name>
Correct

Incorrect
Question 11 of 30

11. Question
Identify a correct command to add or update a node label in docker.
- docker node update
- docker node add
- docker node change
- docker node config
Correct

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Question 12 of 30

12. Question
What service mode is used to deploy a single task of service to each node?
- Replicated
- Global
- Universal
- Distributed
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Question 13 of 30

13. Question
What is the purpose of Docker Content Trust?
- Signing and verification of image tags
- Enabling TLS between the Docker client and server
- Docker registry TLS verification
- Indicating an image on Docker Hub is an official image
Correct

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Question 14 of 30

14. Question
What is the key benefit(s) of Docker Swarm?
- High Availability
- Manage multiple containers
- Lightweight and easy to use
- All of the above
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Question 15 of 30

15. Question
Which command will list all the nodes including manager and worker in a docker swarm cluster?
- docker nodes
- docker node ls
- docker cluster ls
- docker swarm ls
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Question 16 of 30

16. Question
What is the recommended number of minimum Manager nodes for swarm HA setup?
- 2
- 4
- 6
- 3
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Question 17 of 30

17. Question
Which type of networking is not available for Docker Swarm Services?
- Bridge
- None
- Overlay
- Host
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Question 18 of 30

18. Question
Which of the below is an appropriate directory in docker to take backup of docker swarm state?
- /etc/docker
- /var/run/docker
- /var/lib/docker/swarm
- /etc/swarm
Correct

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Question 19 of 30

19. Question
How to deploy 4 containers of httpd using docker?
- docker service scale=4 ‐‐name httpdservice httpd
- docker service ‐‐name httpdservice httpd
- docker service create ‐‐replicas=4 ‐‐name httpdservice httpd
- docker service scale ‐‐replicas=4 ‐‐name httpdservice httpd
Correct

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Question 20 of 30

20. Question
Ingress network belongs to ____________.
- Bridge Network
- Overlay Network
- Host Network
- None Network
Correct

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Question 21 of 30

21. Question
Identify a correct command to set DNS server on all Docker containers.
- dockerd ‐‐dns IP-Address
- dockerd ‐‐set-dns IP-Address
- dockerd ‐‐reset-dns IP-address
- dockerd ‐‐update-dns IP-address
Correct

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Question 22 of 30

22. Question
Which of the commands will create a swarm service which only listens on port 89 using the UDP protocol?
- docker service create ‐‐name test -p 89:89/udp test
- docker service create ‐‐name test -p 89:89 ‐‐service udp test
- docker service create ‐‐name test -p 89:89 ‐‐tcp test
- docker service create ‐‐name test -p 89:89 ‐‐udp test
Correct

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Question 23 of 30

23. Question
Which docker network driver supports a unique MAC address for containers?
- Bridge
- Overlay
- Macvlan
- Host
Correct

Incorrect
Question 24 of 30

24. Question
Which of the following will start Docker in debug mode to identify related issues?
- Set the debug key to true in the 'daemon.json' file
- Start the ‘dockerd’ process manually with the ‘‐‐logging’ flag set to debug
- restart docker processes
- None of the above
Correct

Incorrect
Question 25 of 30

25. Question
Which docker network driver supports communication between containers across docker hosts?
- Bridge
- Overlay
- Macvlan
- None
Correct

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Question 26 of 30

26. Question
What are the types of Docker Swarm mode services?
- Replicated services
- Global Services
- Both (a) and (b)
- None of the above
Correct

Incorrect
Question 27 of 30

27. Question
Which among the following is not a type of node in the docker swarm?
- Manager Node
- Master Node
- Control Plane
- Worker Node
Correct

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Question 28 of 30

28. Question
Which command is used to check visibility into the nodes on your swarm?
- docker node inspect
- docker node ls
- docker node ps
- None of the above
Correct

Incorrect
Question 29 of 30

29. Question
What are the different strategies used by Swarm to determine which nodes each container should run?
- Spread
- Random
- BinPack
- All the above
Correct

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Question 30 of 30

30. Question
How to drain nodes in Swarm?
- docker node – -availability drain <node_name>
- docker node update drain <node_name>
- docker node drain <node_name>
- docker node update – -availability drain <node_name>
Correct

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Docker Swarm

Eligible Rewards

300 NyxCoins*

Assessment Summary

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