Docker Docker Certified Associate DCA Questions & Answers

• Question 131:

  Will this action upgrade Docker Engine CE to Docker Engine EE?

  Solution: Uninstall 'docker-ce' package before installing 'docker-ee' package.

  A. Yes

  B. No

  Correct Answer: A

• Question 132:

  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 them to a team in the engineering organization that has read/write access to the

  engineering/api repository.

  A. Yes

  B. No

  Correct Answer: B

• Question 133:

  Which 'docker run' flag lifts cgroup limitations?

  A. 'docker run --isolation'

  B. 'docker run --cap-drop'

  C. 'docker run --privileged'

  D. 'docker run --cpu-period'

  Correct Answer: C

• Question 134:

  In the context of a swarm mode cluster, does this describe a node? Solution: an instance of the Docker engine participating in the swarm

  A. Yes

  B. No

  Correct Answer: A

• Question 135:

  You created a new service named 'http' and discover it is not registering as healthy. Will this command enable you to view the list of historical tasks for this service?

  Solution: 'docker service inspect http'

  A. Yes

  B. No

  Correct Answer: A

• Question 136:

  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

  A. Yes

  B. No

  Correct Answer: A

• Question 137:

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

  A. Namespaces

  B. Overlay networks

  C. Volumes

  D. Control groups (also know as cgroups)

  Correct Answer: D

• Question 138:

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

  A. Create a volume group in devicemapper and utilize the '--dm.thinpooldev' Docker daemon option, specifying the volume group

  B. Format a partition with xfs and mount it at '/var/lib/docker'

  C. Utilize the '--storage-opt dm.directlvm_device' Docker daemon option, specifying a block device

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

  Correct Answer: C

• Question 139:

  Will this command ensure that overlay traffic between service tasks is encrypted? Solution: docker network create -d overlay -o encrypted=true

  A. Yes

  B. No

  Correct Answer: A

• Question 140:

  A users attempts to set the system time from inside a Docker container are unsuccessful. Could this be blocking this operation?

  Solution: Linux capabilities

  A. Yes

  B. No

  Correct Answer: A