QUESTION: 69

During development of an application meant to be orchestrated by Kubernetes, you want to mount the /data directory on your laptop into a container.

Will this strategy successfully accomplish this?

Solution: Create a PersistentVolume with storageciass: "" and hostPath: /data, and a persistentVolumeClaim requesting this PV. Then use that PVC to populate a volume in a pod

Yes
No

Answer(s): B

Explanation:

= The strategy of creating a PersistentVolume with hostPath and a PersistentVolumeClaim to mount the /data directory on your laptop into a container will not work, because hostPath volumes are only suitable for single node testing or development. They are not portable across nodes and do not support dynamic provisioning. If you want to mount a local directory from your laptop into a Kubernetes pod, you need to use a different type of volume, such as NFS, hostPath CSI, or minikube. Alternatively, you can copy the files from your laptop to the container using kubectl cp command.

Reference:

Volumes | Kubernetes

Configure a Pod to Use a PersistentVolume for Storage | Kubernetes

Mount a local directory to kubernetes pod - Stack Overflow

Kubernetes share a directory from your local system to kubernetes container - Stack Overflow

How to Mount a Host Directory Into a Docker Container

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QUESTION: 70

Is this an advantage of multi-stage builds?

Solution: optimizes Images by copying artifacts selectively from previous stages

Yes
No

Answer(s): A

Explanation:

Multi-stage builds are a feature of Docker that allows you to use multiple FROM statements in your Dockerfile. Each FROM statement creates a new stage of the build, which can use a different base image and run different commands. You can then copy artifacts from one stage to another, leaving behind everything you don't want in the final image. This optimizes the image size and reduces the attack surface by removing unnecessary dependencies and tools. For example, you can use a stage to compile your code, and then copy only the executable file to the final stage, which can use a minimal base image like scratch. This way, you don't need to include the compiler or the source code in the final image.

Reference:

Multi-stage builds | Docker Docs

What Are Multi-Stage Docker Builds? - How-To Geek

Multi-stage | Docker Docs

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QUESTION: 71

Will this command list all nodes in a swarm cluster from the command line?

Solution: 'docker swarm nodes'

Yes
No

Answer(s): B

Explanation:

= The correct command to list all nodes in a swarm cluster from the command line is docker node ls, not docker swarm nodes. The docker node command allows you to manage nodes in a swarm, such as listing, inspecting, updating, or removing nodes. The docker swarm command allows you to manage the swarm itself, such as initializing, joining, leaving, or updating the swarm.

Reference:

Manage nodes in a swarm | Docker Docs

Manage a swarm | Docker Docs

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QUESTION: 72

Will this command list all nodes in a swarm cluster from the command line?

Solution: 'docker node Is'

Yes
No

Answer(s): A

Explanation:

= (Please check the official Docker site for the comprehensive explanation)

Reference:

(Some possible references from the web search results are)

[Docker Swarm Tutorial: Manage Multiple Docker Hosts - Edureka]

[Docker Swarm - Docker Documentation]

[Docker Swarm Tutorial: How to Manage Multiple Docker Hosts - Linux Hint]

[Docker Swarm Tutorial: How to Manage Multiple Docker Hosts - YouTube]

[Docker Swarm Tutorial: How to Manage Multiple Docker Hosts - Medium]

I hope this helps you in your exam preparation. Good luck!

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Free DCA Exam Braindumps (page: 19)

QUESTION: 69

Explanation:

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QUESTION: 70

Explanation:

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QUESTION: 71

Explanation:

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QUESTION: 72

Explanation:

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