Docker New 2022 DCA Test Tutorial (Updated 170 Questions)
DCA Exam Questions Dumps, Selling Docker Products
Docker DCA Exam Syllabus Topics:
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NEW QUESTION 58
The output of which command can be used to find the architecture and operating system an image is compatible with?
- A. docker image ls <image-id>
- B. docker image inspect --filter {{.Architecture}} {{.OS}} ' <image-id>
- C. docker image inspect --format {{.Architecture}} {{.OS}} ' <image-id>
- D. docker image info <image-id>
Answer: C
NEW QUESTION 59
Will this command display a list of volumes for a specific container?
Solution: 'docker container inspect nginx'
- A. Yes
- B. No
Answer: A
NEW QUESTION 60
Wha is the purpose of Docker Content Trust?
- A. Signing and verification of image tags
- B. Indicating an image on Docker Hub is an official image
- C. Docker registry TLS verification and encryption
- D. Enabling mutual TLS between the Docker client and server
Answer: A
NEW QUESTION 61
Is this the purpose of Docker Content Trust?
Solution: Verify and encrypt Docker registry TLS.
- A. Yes
- B. No
Answer: A
NEW QUESTION 62
Seven managers are in a swarm cluster.
Is this how should they be distributed across three datacenters or availability zones?
Solution: 5-1-1
- A. No
- B. Yes
Answer: A
NEW QUESTION 63
Will this Linux kernel facility limit a Docker container's access to host resources, such as CPU or memory?
Solution: cgroups
- A. Yes
- B. No
Answer: A
NEW QUESTION 64
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.
- A. No
- B. Yes
Answer: A
NEW QUESTION 65
The output of which command can be used to find the architecture and operating system an image is
compatible with?
- A. docker image ls <image-id>
- B. docker image inspect --filter {{.Architecture}} {{.OS}} ' <image-id>
- C. docker image inspect --format {{.Architecture}} {{.OS}} ' <image-id>
- D. docker image info <image-id>
Answer: C
NEW QUESTION 66
What is the docker command to setup a swarm?
- A. docker swarm create
- B. docker init swarm
- C. docker swarm init
- D. docker create swarm
Answer: C
Explanation:
https://docs.docker.com/engine/reference/commandline/swarm/
NEW QUESTION 67
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 images that contain the specific configuration for every environment.
- B. Create a Dockerfile for each environment, specifying ports and ENV variables for certificates.
- C. Create a Dockerfile for each environment, specifying ports and Docker secrets for certificates.
- D. Create a config file for each environment.
Answer: D
NEW QUESTION 68
If installing Docker using devicemapper for storage with the Intent to run production workloads, how should devicemapper be configured
- A. aufs-lvm
- B. overlay-lvm
- C. loop-lvm
- D. direct-lvm
Answer: D
NEW QUESTION 69
Which flag for a service would allow a container to consume more than 2 GB of memory only when there is no memory contention but would also prevent a container from consuming more than 4GB of memory, in any case?
- A. --limit-memory 2GB --reserve-memory 4GB
- B. --limit-memory 4GB --reserve-memory 2GB
- C. --memory-swap 4GB --limit-memory 2GB
- D. --memory-swap 2GB --limit-memory 4GB
Answer: D
NEW QUESTION 70
Which one of the following commands will result in the volume being removed automatically once the container
has exited?
- A. 'docker run --rm -v /foo busybox'
- B. 'docker run --read-only -v /foo busybox'
- C. 'docker run --del -v /foo busybox'
- D. 'docker run --remove -v /foo busybox'
Answer: A
NEW QUESTION 71
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
Answer: A
NEW QUESTION 72
Is this an advantage of multi-stage builds?
Solution: better caching when building Docker images
- A. No
- B. Yes
Answer: A
NEW QUESTION 73
Will a DTR security scan detect this?
Solution: licenses for known third party binary components
- A. No
- B. Yes
Answer: A
NEW QUESTION 74
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