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[General] Practice DCA Test Engine & Reliable DCA Test Dumps

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【General】 Practice DCA Test Engine & Reliable DCA Test Dumps

Posted at yesterday 10:37      View：18 | Replies：0        Print      Only Author   [Copy Link] 1#
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Docker Certified Associate (DCA) Exam Sample Questions (Q180-Q185):NEW QUESTION # 180
Will this command display a list of volumes for a specific container?
Solution: docker volume inspect nginx'
  • A. Yes
  • B. No
Answer: B
Explanation:
Explanation
This command will not display a list of volumes for a specific container, because it uses docker volume inspect with an image name instead of a volume name. According to the official documentation, docker volume inspect requires one or more volume names as arguments and will show detailed information about the volumes, not the containers that use them.
References: https://docs.docker.com/engine/r ... ine/volume_inspect/

NEW QUESTION # 181
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. No
  • B. Yes
Answer: B
Explanation:
Explanation
This is how they should be distributed across three datacenters or availability zones, because having an even distribution of managers across datacenters or availability zones ensures that the swarm can survive the loss of any one datacenter or availability zone and maintain quorum. According to the official documentation, managers should be distributed evenly across datacenters or availability zones to ensure that the swarm can survive the loss of any one datacenter or availability zone.
References: https://docs.docker.com/engine/s ... for-fault-tolerance

NEW QUESTION # 182
Is this an advantage of multi-stage builds?
Solution.better logical separation of Dockerfile instructions for increased readability
  • A. No
  • B. Yes
Answer: B
Explanation:
Explanation
= Multi-stage builds allow you to use multiple FROM statements in your Dockerfile, each starting a new stage of the build1. This can help you achieve better logical separation of Dockerfile instructions for increased readability, as well as other benefits such as smaller image size, faster build time, and reduced security risks23.
By separating your Dockerfile into different stages, you can organize your instructions by their purpose, such as building, testing, or deploying your application. You can also copy only the artifacts you need from one stage to another, leaving behind the unnecessary dependencies or tools1. This can make your Dockerfile easier to read and maintain, as well as improve the performance and security of your final image. References:
* Multi-stage builds | Docker Docs
* What Are Multi-Stage Docker Builds? - How-To Geek
* Multi-stage | Docker Docs

NEW QUESTION # 183
Does this command display all the pods in the cluster that are labeled as 'env: development'?
Solution: 'kubectl get pods --all-namespaces -I env=development'
  • A. Yes
  • B. No
Answer: B
Explanation:
Explanation
The command 'kubectl get pods --all-namespaces -I env=development' does not display all the pods in the cluster that are labeled as 'env: development'. The reason is that the flag -I is not a valid option for kubectl get pods. The correct flag to use is --selector or -l, which allows you to filter pods by labels1. Labels are key-value pairs that can be attached to Kubernetes objects to identify, group, or select them2. For example, to label a pod with env=development, one can run:
kubectl label pods my-pod env=development
To display all the pods that have the label env=development, one can run:
kubectl get pods --selector env=development
or
kubectl get pods -l env=development
The --all-namespaces flag can be used to list pods across all namespaces3. Therefore, the correct command to display all the pods in the cluster that are labeled as 'env: development' is:
kubectl get pods --all-namespaces --selector env=development
or
kubectl get pods --all-namespaces -l env=development References:
* kubectl Cheat Sheet | Kubernetes
* Labels and Selectors | Kubernetes
* kubectl get | Kubernetes

NEW QUESTION # 184
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 # 185
......
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