PREPARES YOU FOR THE FORMAT OF YOUR DCA EXAM DUMPS

Prepares you for the format of your DCA exam dumps

Prepares you for the format of your DCA exam dumps

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Docker Certified Associate (DCA) Exam Sample Questions (Q40-Q45):

NEW QUESTION # 40
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

Explanation:
Explanation
= (Please check the official Docker site for the comprehensive explanation) References: (Some possible references from the web search results are)
* Docker Certified Associate (DCA) Study Guide
* [Docker Certified Associate (DCA) Practice Exam Questions]
* [Docker Certified Associate (DCA) Exam Preparation Guide]
I hope this helps you in your exam preparation. Good luck!


NEW QUESTION # 41
The following Docker Compose file is deployed as a stack:

Is this statement correct about this health check definition?
Solution. Health checks lest for app health ten seconds apart. Three failed health checks transition the container into "unhealthy" status.

  • A. Yes
  • B. No

Answer: A

Explanation:
The statement is correct. In the provided Docker Compose file, a health check is defined for the service "app".
It uses curl to perform a health check on the application every 10 seconds (as specified by the "interval" parameter). If it fails three times (as specified by the "retries" parameter), then the container is marked as unhealthy. A health check is a way of checking the health of a running container and applying actions based on the result1. It can be used to monitor the status of the service and restart the container if it becomes unhealthy2. References:
* Compose file version 3 reference | Docker Docs
* Docker Compose & Health Checks - Gabriel's World


NEW QUESTION # 42
Which of the following is NOT backed up when performing a Docker Trusted backup operation?

  • A. Repository metadata
  • B. Image blobs
  • C. DTR configurations
  • D. Access control to repos and images

Answer: B


NEW QUESTION # 43
Can this set of commands identify the published port(s) for a container?
Solution. 'docker port inspect", docker container inspect"

  • A. No
  • B. Yes

Answer: A

Explanation:
The set of commands docker port inspect and docker container inspect will not identify the published port(s) for a container. The reason is that there is no such command as docker port inspect. The correct command to inspect the port mappings of a container is docker port1. The command docker container inspect can also show the port mappings of a container, but it will display a lot of other information as well, so it is not as concise as docker port2. To identify the published port(s) for a container, you can use either of these commands:
* docker port CONTAINER will list all the port mappings of the container1.
* docker port CONTAINER PRIVATE_PORT will list only the port mapping of the specified private port of the container1.
* docker container inspect --format=' { {.NetworkSettings.Ports}}' CONTAINER will list only the port
* mappings of the container in a JSON format23.
For example, if you have a container named web that publishes port 80 to port 8080 on the host, you can use any of these commands to identify the published port:
$ docker port web
80/tcp -> 0.0.0.0:8080
$ docker port web 80
0.0.0.0:8080
$ docker container inspect --format=' { {.NetworkSettings.Ports}}' web
map[80/tcp:[map[HostIp:0.0.0.0 HostPort:8080]]]
References:
* docker port
* docker container inspect
* How can I grab exposed port from inspecting docker container?


NEW QUESTION # 44
Will this command display a list of volumes for a specific container?
Solution: 'docker container inspect nginx'

  • A. Yes
  • B. No

Answer: A

Explanation:
Explanation
This command will display a list of volumes for a specific container, because it uses docker container inspect to show detailed information about a container, including its volumes. According to the official documentation, docker container inspect will show the Mounts section that contains information about all volumes mounted by the container.
References: https://docs.docker.com/engine/reference/commandline/container_inspect/
https://docs.docker.com/storage/volumes/#start-a-container-with-a-volume


NEW QUESTION # 45
......

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