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Get Real Docker Certified Associate (DCA) Exam Test Guide to Quickly Prepare for Docker Certified Associate (DCA) Exam Exam

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Docker Certified Associate (DCA) Exam Sample Questions (Q19-Q24):

NEW QUESTION # 19
An application image runs in multiple environments, with each environment using different certificates and ports.
Is this a way to provision configuration to containers at runtime?
Solution: Provision a Docker config object for each environment.

A. No
B. Yes

Answer: B

Explanation:
= Provisioning a Docker config object for each environment is a way to provision configuration to containers at runtime. Docker configs allow services to adapt their behaviour without the need to rebuild a Docker image. Services can only access configs when explicitly granted by a configs attribute within the services top-level element. As with volumes, configs are mounted as files into a service's container's filesystem1. Docker configs are supported on both Linux and Windows services2. Reference: Docker Documentation, Configs top-level element

NEW QUESTION # 20
Is this the purpose of Docker Content Trust?
Solution: Enable mutual TLS between the Docker client and server.

A. No
B. Yes

Answer: A

Explanation:
Explanation
= Docker Content Trust (DCT) is a feature that allows users to verify the integrity and publisher of container images they pull or deploy from a registry server, signed on a Notary server12. DCT does not enable mutual TLS between the Docker client and server, which is a different security mechanism that ensures encrypted and authenticated communication between the client and the server3. DCT is based on digital signatures and The Update Framework (TUF) to provide trust over arbitrary collections of data1. References:
* Content trust in Docker | Docker Docs
* Docker Content Trust: What It Is and How It Secures Container Images
* Protect the Docker daemon socket | Docker Docs

NEW QUESTION # 21
One of several containers in a pod is marked as unhealthy after failing its livenessProbe many times. Is this the action taken by the orchestrator to fix the unhealthy container?
Solution: The controller managing the pod is autoscaled back to delete the unhealthy pod and alleviate load.

A. No
B. Yes

Answer: A

Explanation:
= The livenessProbe is a mechanism that checks if the container is alive and healthy, and restarts it if it fails1. The orchestrator is the component that manages the deployment and scaling of containers across a cluster of nodes2. The action taken by the orchestrator to fix the unhealthy container is not to autoscale back and delete the pod, but to recreate the pod on the same or a different node3. This ensures that the desired number of replicas for the pod is maintained, and that the pod can resume its normal operation. Autoscaling back and deleting the pod would reduce the availability and performance of the service, and would not necessarily alleviate the load.
References:
* Configure Liveness, Readiness and Startup Probes | Kubernetes
* What is a Container Orchestrator? | Docker
* Pod Lifecycle | Kubernetes
I hope this helps you understand the concept of livenessProbe and orchestrator, and how they work with Docker and Kubernetes. If you have any other questions related to Docker, please feel free to ask me.

NEW QUESTION # 22
You are troubleshooting a Kubernetes deployment called api, and want to see the events table for this object.
Does this command display it?
Solution: kubectl logs deployment api

A. No
B. Yes

Answer: A

Explanation:
= The command kubectl logs deployment api does not display the events table for the deployment object, but rather the logs of the pods that belong to the deployment. To see the events table, you need to use the command kubectl describe deployment api, which shows the details of the deployment, including the events1. References: Kubernetes Documentation, Practice Questions for Docker Certified Associate (DCA) Exam

NEW QUESTION # 23
You add a new user to the engineering organization in DTR.
Will this action grant them read/write access to the engineering/api repository?
Solution: Add them to a team in the engineering organization that has read/write access to the engineering/api repository.

A. No
B. Yes

Answer: A

Explanation:
Explanation
= I cannot give you a comprehensive explanation, but I can tell you that the question is about Docker Trusted Registry (DTR), which is a secure and scalable image storage solution for Docker Enterprise1. DTR allows you to create organizations and teams to manage access to your repositories2. Adding a new user to an organization does not automatically grant them access to any repository. You need to assign them to a team that has the appropriate permissions for the repository you want them to access3. Therefore, the solution suggests adding them to a team in the engineering organization that has read/write access to the engineering/api repository. You will need to understand how DTR works and how to configure access control for repositories to answer this question correctly. References: You can find some useful references for this question in the following links:
* Docker Trusted Registry overview
* Create and manage organizations and teams
* Manage access to repositories

NEW QUESTION # 24
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