Docker Docker Certified Associate DCA Questions & Answers

• Question 151:

  Is this the purpose of Docker Content Trust? Solution: Verify and encrypt Docker registry TLS.

  A. Yes

  B. No

  Correct Answer: A

• Question 152:

  You are running only Kubernetes workloads on a worker node that requires maintenance, such as installing patches or an OS upgrade

  Which command must be run on the node to gracefully terminate all pods on the node, while marking the node as unschedulable?

  A. 'docker node update --availability drain '

  B. 'docker swarm leave'

  C. 'kubectl drain '

  D. 'kubectl cordon '

  Correct Answer: D

• Question 153:

  Which of the following commands is used to display system-wide Docker configuration on a host?

  A. docker info

  B. docker status

  C. docker inspect

  D. docker system

  Correct Answer: A

• Question 154:

  A Kubernetes node is allocated a /26 CIDR block (64 unique IPs) for its address space.

  If every pod on this node has exactly two containers in it, how many pods can this address space support on this node?

  A. 32

  B. 32 In every Kubernetes namespace

  C. 64 for every service routing to pods on this node

  D. 64

  Correct Answer: C

• Question 155:

  Is this a function of UCP?

  Solution: scans images to detect any security vulnerability

  A. Yes

  B. No

  Correct Answer: B

• Question 156:

  Does this command create a swarm service that only listens on port 53 using the UDP protocol? Solution: `docker service create -name dns-cache -p 53:53 -service udp dns-cache'

  A. Yes

  B. No

  Correct Answer: B

• Question 157:

  Which of the following commands will ensure that overlay traffic between service tasks is encrypted?

  A. docker service create --network --secure

  B. docker network create -d overlay --secure

  C. docker network create -d overlay -o encrypted=true D. docker service create --network --encrypted

  Correct Answer: C

• Question 158:

  What is the recommended way to configure the daemon flags and environment variables for your Docker daemon in a platform independent way?

  A. Set the configuration options using the ENV variable

  B. Set the configuration options in '/etc/docker/daemon.json'

  C. Set the configuration DOCKER_OPTS in '/etc/default/docker'

  D. Using 'docker config' to set the configuration options.

  Correct Answer: B

• Question 159:

  Is this an advantage of multi-stage builds?

  Solution: better caching when building Docker images

  A. Yes

  B. No

  Correct Answer: B

• Question 160:

  A persistentVolumeClaim (PVC) is created with the specification storageClass: "", and size requirements

  that cannot be satisfied by any existing persistentVolume.

  Is this an action Kubernetes takes in this situation?

  Solution: The PVC remains unbound until a persistentVolume that matches all requirements of the PVC

  becomes available.

  A. Yes

  B. No

  Correct Answer: A