DCA TEST ANSWERS | DCA LATEST EXAM PDF

DCA Test Answers | DCA Latest Exam Pdf

DCA Test Answers | DCA Latest Exam Pdf

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The DCA certification exam is an online, proctored exam that consists of 55 multiple-choice questions. DCA exam duration is 90 minutes, and the passing score is 65%. DCA exam fee is $195, and the certification is valid for two years. DCA exam is available in English, Japanese, and Simplified Chinese.

Docker Certified Associate (DCA) Exam is a certification program designed for IT professionals who want to validate their skills and knowledge in using Docker technology. Docker has become an essential tool for building, shipping, and running applications across different environments. As such, the DCA Certification is highly valuable in today's job market, especially for IT professionals who want to work with containerized applications.

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Docker Certified Associate (DCA) exam is a certification program that validates the skills and knowledge of professionals in the field of containerization and Docker technology. This program is designed to test the proficiency of individuals in using Docker tools and services, in creating and managing Docker images, and in deploying and managing Docker containers. The DCA Certification is recognized globally as a benchmark for Docker expertise and is considered a valuable credential for professionals seeking to advance their careers in the IT industry.

Docker Certified Associate (DCA) Exam Sample Questions (Q162-Q167):

NEW QUESTION # 162
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: Kubernetes automatically triggers a user-defined script to attempt to fix the unhealthy container.

  • A. Yes
  • B. No

Answer: B

Explanation:
Explanation
Kubernetes does not automatically trigger a user-defined script to attempt to fix the unhealthy container, because Kubernetes does not have such a feature. According to the official documentation, Kubernetes only supports three types of probes: exec, httpGet, and tcpSocket, and none of them can execute arbitrary scripts.
References:
https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/#define-a-li


NEW QUESTION # 163
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'

  • A. Yes
  • B. No

Answer: B


NEW QUESTION # 164
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?

  • A. Tag the image with 'nginx:immutable'
  • B. Remove push access from all other users.
  • C. Keep a backup copy of the image on another repository.
  • D. Use the DTR web UI to make the tag immutable.

Answer: D


NEW QUESTION # 165
The Kubernetes yaml shown below describes a clusterIP service.

Is this a correct statement about how this service routes requests?
Solution: Traffic sent to the IP of this service on port 80 will be routed to port 8080 in a random pod with the label app:
nginx.

  • A. Yes
  • B. No

Answer: B

Explanation:
The statement is not entirely correct.In Kubernetes, a service of typeClusterIProutes traffic sent to its IP address to the pods selected by its label selector1.However, the port to which the traffic is routed in the pod is determined by thetargetPortspecified in the service definition1.IftargetPortis not specified, it defaults to being the same as theportfield1. In the providedYAML snippet, there is notargetPortspecified for port 80, so we cannot confirm that the traffic will be routed to port 8080 in the pod.Therefore, without additional information about the pod configuration, we cannot verify the provided solution statement1.


NEW QUESTION # 166
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 controller managing the pod is autoscaled back to delete the unhealthy pod and alleviate load.

  • A. Yes
  • B. No

Answer: B

Explanation:
= The livenessProbe is a mechanism that checks if the container is alive and healthy, and restarts it if it fails1. The orchestrator is the component that manages the deployment and scaling of containers across a cluster of nodes2. The action taken by the orchestrator to fix the unhealthy container is not to autoscale back and delete the pod, but to recreate the pod on the same or a different node3. This ensures that the desired number of replicas for the pod is maintained, and that the pod can resume its normal operation. Autoscaling back and deleting the pod would reduce the availability and performance of the service, and would not necessarily alleviate the load.
References:
* Configure Liveness, Readiness and Startup Probes | Kubernetes
* What is a Container Orchestrator? | Docker
* Pod Lifecycle | Kubernetes
I hope this helps you understand the concept of livenessProbe and orchestrator, and how they work with Docker and Kubernetes. If you have any other questions related to Docker, please feel free to ask me.


NEW QUESTION # 167
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