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[Hardware] DCA Examcollection Vce - DCA Valid Test Review

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【Hardware】 DCA Examcollection Vce - DCA Valid Test Review

Posted at before yesterday 06:29      View：8 | Replies：0        Print      Only Author   [Copy Link] 1#
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Docker Certified Associate (DCA) certification exam is a popular certification for IT professionals who work with Docker container technology. Docker is a popular platform for building, shipping, and running distributed applications. The DCA certification is designed to validate the skills and knowledge of an individual in Docker container technology. DCA Exam measures the knowledge of the candidates in various areas such as Docker architecture, installation and configuration, Docker networking, security, and troubleshooting.
Docker Certified Associate (DCA) Exam Sample Questions (Q175-Q180):NEW QUESTION # 175
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. No
  • B. Yes
Answer: B
Explanation:
Explanation
= A persistentVolumeClaim (PVC) is a request for storage by a user. It is similar to a Pod. Pods consume node resources and PVCs consume PV resources1. A PVC can specify a storage class, which is a way of requesting a certain quality of service for the volume2. If the storage class is empty, it means the PVC does not have any specific storage class requirements and can be bound to any PV that satisfies its size and access mode3.
However, if there is no existing PV that matches the PVC's requirements, the PVC remains unbound until a suitable PV becomes available. This can happen either by manual provisioning by an administrator or by dynamic provisioning using StorageClasses1. References:
* Persistent Volumes | Kubernetes
* Storage Classes | Kubernetes
* Configure a Pod to Use a PersistentVolume for Storage | Kubernetes

NEW QUESTION # 176
Will this Linux kernel facility limit a Docker container's access to host resources, such as CPU or memory?
Solution: cgroups
  • A. No
  • B. Yes
Answer: B
Explanation:
Docker uses cgroups, a Linux kernel feature, to limit the resources a container can use. This includes CPU and memory resources12. For instance, Docker can limit a container's CPU usage to the equivalent of a single CPU core on the Docker host system2. Similarly, Docker can limit a container's memory usage1. However, to use these features, the Docker host must have cgroup memory and swap accounting enabled1. Therefore, cgroups can indeed limit a Docker container's access to host resources such as CPU and memory12.

NEW QUESTION # 177
Your organization has a centralized logging solution, such as Splunk.
Will this configure a Docker container to export container logs to the logging solution?
Solution. docker logs <eontainer-id>
  • A. Yes
  • B. No
Answer: B
Explanation:
= The command docker logs <container-id> will not configure a Docker container to export container logs to the logging solution. This command is used to fetch the logs of a container from the Docker daemon, not to send them to an external service1. To export container logs to a logging solution, such as Splunk, you need to use a Docker logging driver2. A logging driver is a way of plugging into the Docker engine to forward logs to a specific destination2. Docker supports several built-in logging drivers, including one for Splunk3. To use the Splunk logging driver, you need to specify the --log-driver splunk option when running a container, and provide some additional options, such as the Splunk HTTP Event Collector token and URL3. Alternatively, you can configure the Splunk logging driver as the default logging driver for the Docker daemon by editing the daemon.json file4. References:
* 1: docker logs | Docker Docs
* 2: Configure logging drivers | Docker Docs
* 3: Splunk logging driver | Docker Docs
* 4: Collecting docker logs and stats with Splunk | Splunk

NEW QUESTION # 178
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:
= I cannot give you a comprehensive explanation, but I can tell you that the question is about Kubernetes, not Docker. Kubernetes is an orchestrator that can manage multiple containers in a pod, which is a group of containers that share a network and storage. A livenessProbe is a way to check if a container is alive and ready to serve requests. If a container fails its livenessProbe, Kubernetes will try to restart it by default. However, you can also specify a custom action to take when a container fails its livenessProbe, such as running a script to fix the problem. This is what the solution is referring to. You will need to understand the difference between Kubernetes and Docker, and how they work together, to answer this question correctly. Reference: You can find some useful references for this question in the following links:
Kubernetes Pods
Configure Liveness, Readiness and Startup Probes
Docker and Kubernetes

NEW QUESTION # 179
You configure a local Docker engine to enforce content trust by setting the environment variable
DOCKER_CONTENT_TRUST=1.
If myorg/myimage: 1.0 is unsigned, does Docker block this command?
Solution: docker image import <tarball> myorg/myimage:1.0
  • A. No
  • B. Yes
Answer: B

NEW QUESTION # 180
......
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