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  1. Home
  2. Docker Certification
  3. DCA Exam
  4. Docker.DCA.v2023-09-25.q118 Dumps
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Question 81

Does this describe the role of Control Groups (cgroups) when used with a Docker container?
Solution: user authorization to the Docker API

Correct Answer: A
insert code

Question 82

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

Correct Answer: B
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/reference/commandline/volume_inspect/
insert code

Question 83

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 any pod with the label app: nginx on port 8080 will be forwarded to port 80 in that pod.

Correct Answer: B
Explanation
Traffic sent to the IP of any pod with the label app: nginx on port 8080 will be forwarded to port 80 in that pod is not a correct statement about how this service routes requests. A clusterIP service does not route requests based on the pod IP, but on the service IP. A clusterIP service also does not forward requests from one port on the pod IP to another port on the same pod IP, but from one port on the service IP to another port on the pod IP. Therefore, this statement is incorrect and does not describe how this service routes requests. References:
https://kubernetes.io/docs/concepts/services-networking/service/#defining-a-service,
https://kubernetes.io/docs/concepts/services-networking/service/#virtual-ips-and-service-proxies
insert code

Question 84

You created a new service named 'http* and discover it is not registering as healthy. Will this command enable you to view the list of historical tasks for this service?
Solution. 'docker inspect http"

Correct Answer: B
Explanation
Using docker inspect http does not enable you to view the list of historical tasks for this service. The docker inspect command shows low-level information about one or more objects, such as containers, images, networks, etc. It does not show information about services or tasks. To view the list of historical tasks for this service, you need to use docker service ps http --no-trunc. References:
https://docs.docker.com/engine/reference/commandline/inspect/,
https://docs.docker.com/engine/reference/commandline/service_ps/
insert code

Question 85

A users attempts to set the system time from inside a Docker container are unsuccessful. Could this be blocking this operation?
Solution: Linux capabilities

Correct Answer: B
insert code
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