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Pass Guaranteed Quiz Newest Docker - Study DCA Tool

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To qualify for the Docker Certified Associate (DCA) exam, candidates must have a solid understanding of Docker technology and its various components. They should also be familiar with the Docker command line interface (CLI) and have experience working with Docker images, containers, and networks. Candidates can prepare for the exam by taking Docker training courses, reading the Docker documentation, and practicing with Docker technology on their own.

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To prepare for the Docker DCA Exam, candidates can take advantage of a variety of resources. Docker offers a free study guide that covers all of the topics that are covered on the exam. In addition, there are a number of online courses and training programs that can help candidates prepare for the exam. Candidates can also take practice exams to test their knowledge and identify areas where they need to focus their study.

The DCA exam covers a broad range of topics related to Docker, including containerization, image creation and management, orchestration, networking, security, and storage. Candidates are expected to be proficient in the use of Docker tools and technologies such as Docker Engine, Docker Compose, Docker Swarm, and Docker Hub. They are also expected to have a solid understanding of how Docker integrates with other technologies and platforms, such as Kubernetes, AWS, and Azure.

Docker Certified Associate (DCA) Exam Sample Questions (Q62-Q67):

NEW QUESTION # 62
When using the Docker client to push an image to a registry, what environment variable is used to instruct the client to perform signing of the image?

A. NOTARY_ENABLE=1
Correct
B. DOCKER_PUSH_SIGN=1
C. DOCKER_CONTENT_TRUST=1
D. DOCKER_IMAGE_SIGN=1

Answer: C

NEW QUESTION # 63
In the context of a swarm mode cluster, does this describe a node?
Solution. an instance of the Docker CLI connected to the swarm

A. No
B. Yes

Answer: A

Explanation:
The statement does not describe a node in the context of a swarm mode cluster. A node is a physical or virtual machine running Docker Engine 1.12 or later in swarm mode1. An instance of the Docker CLI connected to the swarm is not a node, but a client that can interact with the swarm through the Docker API2. The Docker CLI can be used to create a swarm, join nodes to a swarm, deploy services to a swarm, and manage swarm behavior3. References: How nodes work), Docker CLI), Swarm mode overview)

NEW QUESTION # 64
Will this command ensure that overlay traffic between service tasks is encrypted?
Solution: docker service create --network --secure

A. No
B. Yes

Answer: A

Explanation:
Explanation
This command will not ensure that overlay traffic between service tasks is encrypted, because it uses an invalid option for enabling encryption and an incomplete option for specifying the network. According to the official documentation, there is no such option as --secure for the docker service create command. The correct option to use is --network <network-name> where <network-name> is an existing overlay network that was created with encryption enabled.
References: https://docs.docker.com/network/drivers/overlay/#encryption
https://docs.docker.com/engine/reference/commandline/service_create/

NEW QUESTION # 65
During development of an application meant to be orchestrated by Kubemetes, you want to mount the /data directory on your laptop into a container.
Will this strategy successfully accomplish this?
Solution. Create a Persistent VolumeClaim requesting storageClass:"" (which defaults to local storage) and hostPath and use this to populate a volume in a pod.

A. Yes
B. No

Answer: A

Explanation:
Explanation
This strategy does successfully mount the /data directory on your laptop into a container. Creating a persistentVolumeClaim requesting storageClass:"" (which defaults to local storage) and hostPath and using this to populate a volume in a pod is a valid way to mount a host directory into a container in Kubernetes. A persistentVolumeClaim is a request for storage by a user or an application. A persistentVolume is an abstraction that represents a piece of storage in the cluster. A storageClass is a type of storage with a specific provisioner and parameters. A hostPath volume allows you to mount a file or directory from the host node's filesystem into your pod. A local volume allows you to mount local storage devices such as disks or partitions into your pod. By creating a persistentVolumeClaim with storageClass:"" and hostPath, you are requesting a piece of storage that is backed by a hostPath volume on the node where the pod is scheduled. By using this persistentVolumeClaim to populate a volume in a pod, you are mounting the host directory into the container in the pod. References: https://kubernetes.io/docs/concepts/storage/persistent-volumes/,
https://kubernetes.io/docs/concepts/storage/storage-classes/,
https://kubernetes.io/docs/concepts/storage/volumes/#hostpath,
https://kubernetes.io/docs/concepts/storage/volumes/#local

NEW QUESTION # 66
A host machine has four CPUs available and two running containers. The sysadmin would like to assign two CPUs to each container.
Which of the following commands achieves this?

A. Set the '--cpuset-cpus' flag to '.5' on both containers
B. Set the '--cpuset-cpu's flag to '1.3' on one container and '2.4' on the other container.
C. Set the '--cpuset-cpus' flag of the 'dockerd' process to the value 'even-spread'
D. Set the '--cpu-quota' flag to '1.3' on one container and '2,4' on the other container.

Answer: A

NEW QUESTION # 67
......

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