Docker Docker Certified Associate DCA Questions & Answers

• Question 141:

  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: Add a volume to the pod that sets hostPath.path: /data, and then mount this volume into the pod's containers as desired.

  A. Yes

  B. No

  Correct Answer: B

• Question 142:

  A company's security policy specifies that development and production containers must run on separate

  nodes in a given Swarm cluster.

  Can this be used to schedule containers to meet the security policy requirements?

  Solution: label contraints

  A. Yes

  B. No

  Correct Answer: B

• Question 143:

  What service mode is used to deploy a single task of a service to each node?

  A. replicated

  B. spread

  C. universal

  D. distributed

  E. global

  Correct Answer: E

• Question 144:

  Which statement is true about DTR garbage collection?

  A. Garbage collection removes unreferenced image layers from DTR's backend storage.

  B. Garbage collection removes exited containers from cluster nodes.

  C. Garbage collection removes DTR images that are older than a configurable of days

  D. Garbage collection removes unused volumes from cluster nodes

  Correct Answer: A

• Question 145:

  An application image runs in multiple environments, and each environment uses different certificates and ports, what is the best practice to deploy the containers?

  A. Create a Dockerfile for each environment, specifying ports and ENV variables for certificates.

  B. Create a Dockerfile for each environment, specifying ports and Docker secrets for certificates.

  C. Create images that contain the specific configuration for every environment.

  D. Create a config file for each environment.

  Correct Answer: D

• Question 146:

  Which of the following is NOT backed up when performing a Docker Trusted backup operation?

  A. Access control to repos and images

  B. Repository metadata

  C. Image blobs

  D. DTR configurations

  Correct Answer: C

• Question 147:

  The following Docker Compose file is deployed as a stack:

  

  Is this statement correct about this health check definition?

  Solution: Health checks test for app health ten seconds apart. If the test fails, the container will be restarted three times before it gets rescheduled.

  A. Yes

  B. No

  Correct Answer: B

• Question 148:

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

  A. docker system logs

  B. docker system events

  C. docker container events

  D. docker container logs

  Correct Answer: B

• Question 149:

  Seven managers are in a swarm cluster.

  Is this how should they be distributed across three datacenters or availability zones?

  Solution: 3-2-2

  A. Yes

  B. No

  Correct Answer: A

• Question 150:

  Which of the following modes can be used for service discovery of a Docker swarm service (Pick 2 correct answers)

  A. Virtual IP (VIP) with --endpoint-mode vip

  B. Overlay with --endpoint-mode overlay

  C. DNS Round-Robin with --endpoint-mode dnsrr

  D. Ingress with --endpoint-mode ingress

  E. Network Address Translation(NAT) with --endpoint-mode nat

  Correct Answer: AC