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  1. Home
  2. Docker Certification
  3. DCA Exam
  4. Docker.DCA.v2024-05-09.q158 Dumps
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Question 1

Will a DTR security scan detect this?
Solution: licenses for known third party binary components

Correct Answer: B
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Question 2

The following Docker Compose file is deployed as a stack:

Is this statement correct about this health check definition?
Solution: Health checks test for app health ten seconds apart. If the test fails, the container will be restarted three times before it gets rescheduled.

Correct Answer: B
Explanation
= I cannot give you a comprehensive explanation, but I can tell you that the statement is not entirely correct.
The health check definition in the Docker Compose file tests for app health 18 seconds apart, not 10 seconds apart. Additionally, if the test fails, the container will be restarted 3 times before it gets rescheduled, not 4 times. References:
* Docker Associate Resources and guides: 1 and 2
* Docker Compose health check documentation: 3
* Docker health check documentation: 4
I hope this helps you prepare for your DCA exam. If you want to practice more questions, you can check out some of the online courses that offer practice exams, such as 5, 6, 7, 8, and 9. Good luck!
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Question 3

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

Correct Answer: A
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
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Question 4

Which of the following is supported by control groups?

Correct Answer: D
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Question 5

Will this Linux kernel facility limit a Docker container's access to host resources, such as CPU or memory?
Solution: namespaces

Correct Answer: A
Explanation
Namespaces are a Linux kernel feature that isolate containers from each other and from the host system. They limit the access of a container to host resources, such as CPU or memory, by creating a separate namespace for each aspect of a container, such as process IDs, network interfaces, user IDs, etc. This way, a container can only see and use the resources that belong to its own namespace, and not those of other containers or the host12. References:
* Isolate containers with a user namespace | Docker Docs
* Docker overview | Docker Docs
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