PREPARE FOR THE DOCKER DCA EXAM ON ANY DEVICE WITH PASSTESTKING PDF FORMAT

Prepare for the Docker DCA Exam on Any Device with PassTestking PDF Format

Prepare for the Docker DCA Exam on Any Device with PassTestking PDF Format

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Docker Certified Associate (DCA) Exam Sample Questions (Q81-Q86):

NEW QUESTION # 81
Is this a type of Linux kernel namespace that provides container isolation?
Solution: Storage

  • A. Yes
  • B. No

Answer: B


NEW QUESTION # 82
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. Yes
  • B. No

Answer: B

Explanation:
Explanation
= Creating a collection for each application is not a way to accomplish this. A collection is a term used by Ansible to describe a package of related content that can be used to automate the management of Kubernetes resources1. A collection is not a native Kubernetes concept and does not group resources together within the cluster. To group Kubernetes-specific resources, such as secrets, for each application, you need to use namespaces. A namespace is a logical partition of the cluster that allows you to isolate resources and apply policies to them2. You can create a namespace for each application and store the secrets and other resources in that namespace. This way, you can prevent conflicts and limit access to the resources of each application. To create a namespace, you can use the kubectl create namespace command or a yaml file2. To create a secret within a namespace, you can use the kubectl create secret command with the --namespace option or a yaml file with the metadata.namespace field3. References:
* Kubernetes Collection for Ansible - GitHub
* Namespaces | Kubernetes
* Secrets | Kubernetes
* Managing Secrets using kubectl | Kubernetes


NEW QUESTION # 83
A company's security policy specifies that development and production containers must run on separate nodes in a given Swarm cluster.
Can this be used to schedule containers to meet the security policy requirements?
Solution: label contraints

  • A. No
  • B. Yes

Answer: B

Explanation:
Explanation
Label constraints can be used to schedule containers to meet the security policy requirements. Label constraints allow you to specify which nodes a service can run on based on the labels assigned to the nodes1.
For example, you can label the nodes that are intended for development with env=dev and the nodes that are intended for production with env=prod. Then, you can use the --constraint flag when creating a service to restrict it to run only on nodes with a certain label value. For example, docker service create --name dev-app
--constraint 'node.labels.env == dev' ... will create a service that runs only on development nodes2. Similarly, docker service create --name prod-app --constraint 'node.labels.env == prod' ... will create a service that runs only on production nodes3. This way, you can ensure that development and production containers are running on separate nodes in a given Swarm cluster. References:
* Add labels to swarm nodes
* Using placement constraints with Docker Swarm
* Multiple label placement constraints in docker swarm


NEW QUESTION # 84
Will this Linux kernel facility limit a Docker container's access to host resources, such as CPU or memory?
Solution: cgroups

  • A. No
  • B. Yes

Answer: B

Explanation:
Explanation
= (Please check the official Docker site for the comprehensive explanation) References: (Some possible references from the web search results are)
* Docker Certified Associate (DCA) Study Guide
* [Docker Certified Associate (DCA) Practice Exam Questions]
* [Docker Certified Associate (DCA) Exam Preparation Guide]
I hope this helps you in your exam preparation. Good luck!


NEW QUESTION # 85
Is this a Linux kernel namespace that is disabled by default and must be enabled at Docker engine runtime to be used?
Solution: mnt

  • A. Yes
  • B. No

Answer: B

Explanation:
Explanation
mnt is not a Linux kernel namespace that is disabled by default and must be enabled at Docker engine runtime to be used. According to the official documentation, mnt is one of the namespaces that are enabled by default when using namespaces for isolation.
References: https://docs.docker.com/engine/security/userns-remap/#user-namespace-known-limitations


NEW QUESTION # 86
......

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