Easily To Pass New DCA Verified & Correct Answers [Aug 29, 2022 [Q89-Q109]

Rate this post

Easily To Pass New DCA Verified & Correct Answers [Aug 29, 2022

Free DCA Exam Files Downloaded Instantly

Q89. Which command interactively monitors all container activity in the Docker engine?

docker system logs

docker system events

docker container events

docker container logs

Q90. Will this command list all nodes in a swarm cluster from the command line?
Solution: ‘docker node Is’

Yes

Q91. The output of which command can be used to find the architecture and operating system an image is compatible with?

docker image inspect –filter {{.Architecture}} {{.OS}} ‘ <image-id>

docker image ls <image-id>

docker image inspect –format {{.Architecture}} {{.OS}} ‘ <image-id>

docker image info <image-id>

Q92. Does this command display all the pods in the cluster that are labeled as ‘env: development’?
Solution: ‘kubectl get pods –all-namespaces -I env=development’

Yes

Q93. Will this command mount the host’s ‘/data’ directory to the ubuntu container in read-only mode?
Solution: ‘docker run –add-volume /data /mydata -read-only ubuntu’

Yes

Q94. Your organization has a centralized logging solution, such as Splunk.
Will this configure a Docker container to export container logs to the logging solution?
Solution: Set the log-driver and log-oPt keys to values for the logging solution (Splunk) In the daemon.json file.

Yes

Q95. 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

Q96. Seven managers are in a swarm cluster.
Is this how should they be distributed across three datacenters or availability zones?
Solution: 5-1-1

Yes

Q97. Two pods bear the same label, app: dev.
Will a label selector matching app: dev match both of these pods?

Yes, as long as all the containers in those pods are passing their livenessProbes and readinessProbes.

Yes, if both pods were pre-existing when the label selector was declared.

Yes, if the pods are in the same Kubernetes namespace as the object bearing the label selector

Yes, if the pods are in the same Kubernetes namespace as the object bearing the label selector and both pods were preexisting when the label selector was declared.

Q98. Which ‘docker run’ flag lifts cgroup limitations?

‘docker run –isolation’

‘docker run –cap-drop’

‘docker run –privileged’

‘docker run –cpu-period’

Q99. What is used by the kernel to Isolate resources when running Docker containers?

Namespaces

Overlay networks

Volumes

Control groups (also know as cgroups)

Q100. A server is running low on disk space. What command can be used to check the disk usage of images, containers, and volumes for Docker engine?

‘docker system df’

‘docker system prune’

‘docker system free’

‘docker system ps’

Q101. In Docker Trusted Registry, how would a user prevent an image, for example ‘nginx:latest’ from being overwritten by another user with push access to the repository?

Tag the image with ‘nginx:immutable’

Remove push access from all other users.

Use the DTR web UI to make the tag immutable.

Keep a backup copy of the image on another repository.

Q102. Which of the following constitutes a production-ready devicemapper configuration for the Docker engine?

Create a volume group in devicemapper and utilize the ‘–dm.thinpooldev’ Docker daemon option, specifying the volume group

Format a partition with xfs and mount it at ‘/var/lib/docker’

Utilize the ‘–storage-opt dm.directlvm_device’ Docker daemon option, specifying a block device

Nothing, devicemapper comes ready for production usage out of the box

Explanation

Q103. You add a new user to the engineering organization in DTR.
Will this action grant them read/write access to the engineering/api repository?
Solution: Add the user directly to the list of users with read/write access under the repository’s Permissions tab.

Yes

Q104. Will this configuration achieve fault tolerance for managers in a swarm?
Solution: an odd number of manager nodes, totaling more than two

Yes

Q105. Is this a type of Linux kernel namespace that provides container isolation?
Solution: Storage

Yes

Q106. One of several containers in a pod is marked as unhealthy after failing its livenessProbe many times. Is this the action taken by the orchestrator to fix the unhealthy container?
Solution: The unhealthy container is restarted.

Yes

Q107. Which one of the following commands will show a list of volumes for a specific container?

‘docker container logs nginx –volumes’

‘docker container inspect nginx’

‘docker volume inspect nginx’

‘docker volume logs nginx –containers’

Q108. Will this action upgrade Docker Engine CE to Docker Engine EE?
Solution: Uninstall ‘docker-ce’ package before installing ‘docker-ee’ package.

Yes

Q109. How do you configure Docker engine to use a registry that is not configured with TLS certificates from a trusted CA?

Set IGNORE_TLS in the ‘daemon.json’ configuration file.

Set and export the IGNORE_TLS environment variable on the command line

Set INSECURE_REGISTRY in the ‘/etc/docker/default’ configuration file

Pass the ‘–insecure.-registry’ flag to the daemon at run time

Loading …