ACCURATE DCA PREP MATERIAL | DCA CERTIFICATION SAMPLE QUESTIONS

Accurate DCA Prep Material | DCA Certification Sample Questions

Accurate DCA Prep Material | DCA Certification Sample Questions

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Tags: Accurate DCA Prep Material, DCA Certification Sample Questions, DCA VCE Dumps, DCA Formal Test, Exam DCA Pattern

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DCA Certification Sample Questions | DCA VCE Dumps

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Docker Certified Associate (DCA) Exam Sample Questions (Q156-Q161):

NEW QUESTION # 156
In Docker Trusted Registry, is this how a user can prevent an image, such as 'nginx:latest', from being overwritten by another user with push access to the repository?
Solution: Keep a backup copy of the image on another repository.

  • A. No
  • B. Yes

Answer: A

Explanation:
Explanation
= Keeping a backup copy of the image on another repository is not how a user can prevent an image, such as
'nginx:latest', from being overwritten by another user with push access to the repository. This approach does not prevent the original image from being overwritten, it only provides a way to restore it from another source.
However, this may not be reliable or efficient, as the backup repository may not be in sync with the original one, or may not be accessible at all times. To prevent an image from being overwritten by another user, the user can use the DTR web UI to make the tag immutable1. This feature allows the user to lock a specific tag, so that no one can push a new image with the same tag to the repository. This ensures that the image is always consistent and secure1. References:
* Make a tag immutable | Docker Docs


NEW QUESTION # 157
You configure a local Docker engine to enforce content trust by setting the environment variable DOCKER_C0NTENT_TRUST=l. If myorg/myimage: 1.0 is unsigned, does Docker block this command?
Solution.docker image build, from a Dockeflle that begins FROM myorg/myimage: l1.0

  • A. Yes
  • B. No

Answer: A

Explanation:
Explanation
= Docker will block this command if you configure the local Docker engine to enforce content trust by setting the environment variable DOCKER_CONTENT_TRUST=1. This means that you can only pull, run, or build with trusted images that have been signed using Docker Content Trust (DCT)1. DCT is a feature that allows you to use digital signatures to verify the integrity and the publisher of specific image tags2. If myorg/myimage:1.0 is unsigned, it means that it does not have a valid signature from the image publisher or a trusted delegate. Therefore, Docker will not allow you to build an image from a Dockerfile that begins with FROM myorg/myimage:1.0, as it cannot verify the source or the content of the base image. You will get an error message like this:
No valid trust data for 1.0
To avoid this error, you need to either disable DCT by setting DOCKER_CONTENT_TRUST=0, or use a signed image tag as the base image in your Dockerfile3. References:
* Content trust in Docker | Docker Docs
* Docker Content Trust: What It Is and How It Secures Container Images
* Automation with content trust | Docker Docs


NEW QUESTION # 158
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. Create a collection for for each application.

  • A. No
  • B. Yes

Answer: A

Explanation:
Explanation
Creating a collection for each application is not a way to deploy applications using Kubernetes and group Kubernetes-specific resources for each application. A collection is a concept in Universal Control Plane (UCP) that defines a set of resources that users or teams can access. A collection can contain swarm services, Kubernetes namespaces, or volumes. A collection does not deploy applications or group resources; it only controls access to them. To deploy applications using Kubernetes and group Kubernetes-specific resources for each application, you can use namespaces or labels. A namespace is a way of isolating and organizing objects in a cluster. A label is a key-value pair that can be attached to any object for grouping or selecting purposes.
References: https://docs.docker.com/ee/ucp/authorization/concepts/,
https://kubernetes.io/docs/concepts/overview/working-with-objects/namespaces/,
https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/


NEW QUESTION # 159
Is this the purpose of Docker Content Trust?
Solution: Verify and encrypt Docker registry TLS.

  • A. Yes
  • B. No

Answer: A


NEW QUESTION # 160
In Docker Trusted Registry, how would a user prevent an image, for example 'nginx:latest' from being
overwritten by another user with push access to the repository?

  • A. Keep a backup copy of the image on another repository.
  • B. Remove push access from all other users.
  • C. Tag the image with 'nginx:immutable'
  • D. Use the DTR web UI to make the tag immutable.

Answer: D


NEW QUESTION # 161
......

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