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  2. Docker Certification
  3. DCA Exam
  4. Docker.DCA.v2024-05-09.q158 Dumps
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Question 56

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

Correct Answer: B
Explanation
This does not describe the role of Control Groups (cgroups) when used with a Docker container, because user authorization to the Docker API is not related to cgroups. According to the official documentation, cgroups are a Linux kernel feature that limits and isolates the resource usage of a group of processes, such as CPU, memory, disk I/O, network, etc. Docker can use cgroups to share available hardware resources to containers and optionally enforce limits and constraints.
References: https://docs.docker.com/config/containers/runmetrics/
https://bikramat.medium.com/namespace-vs-cgroup-60c832c6b8c8
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Question 57

Which of the following constitutes a production-ready devicemapper configuration for the Docker engine?

Correct Answer: C
Explanation
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Question 58

Two development teams in your organization use Kubernetes and want to deploy their applications while ensuring that Kubernetes-specific resources, such as secrets, are grouped together for each application.
Is this a way to accomplish this?
Solution: Add all the resources to the default namespace.

Correct Answer: B
Explanation
Adding all the resources to the default namespace is not a way to accomplish this, because it would not isolate the resources for each application. Instead, the teams should use namespaces, which are a mechanism to organize resources in a Kubernetes cluster. Namespaces provide a scope for names of resources and a way to attach authorization and policy to a subset of the cluster. By creating a separate namespace for each application, the teams can ensure that their resources are grouped together and not accessible by other teams or applications.
References:
* What is a Container? | Docker
* Docker Certified Associate Guide | KodeKloud
* DCA Prep Guide | GitHub
* Namespaces | Kubernetes
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Question 59

Is this the purpose of Docker Content Trust?
Solution. Sign and verify image tags.

Correct Answer: A
Explanation
Signing and verifying image tags is the purpose of Docker Content Trust. Docker Content Trust (DCT) is a feature that allows you to use digital signatures for data sent to and received from remote Docker registries.
These signatures allow client-side or runtime verification of the integrity and publisher of specific image tags.
With DCT, image publishers can sign their images and image consumers can ensure that the images they pull are signed. References: https://docs.docker.com/engine/security/trust/
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Question 60

Two development teams in your organization use Kubernetes and want to deploy their applications while ensuring that Kubernetes-specific resources, such as secrets, are grouped together for each application.
Is this a way to accomplish this?
Solution: Add all the resources to the default namespace.

Correct Answer: B
insert code
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