100% PASS QUIZ DCA - THE BEST TEST DOCKER CERTIFIED ASSOCIATE (DCA) EXAM TUTORIALS

100% Pass Quiz DCA - The Best Test Docker Certified Associate (DCA) Exam Tutorials

100% Pass Quiz DCA - The Best Test Docker Certified Associate (DCA) Exam Tutorials

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The DCA certification is offered by Docker, Inc., and it is recognized as a valuable credential by many organizations in the IT industry. It is an entry-level certification, and it is ideal for professionals who want to demonstrate their competence in using Docker technology. Docker Certified Associate (DCA) Exam certification exam is conducted online, and it consists of 55 multiple-choice questions that need to be completed within 90 minutes. DCA exam fee is $195 USD, and candidates who pass the exam are awarded the Docker Certified Associate (DCA) certificate.

To prepare for the DCA Exam, candidates can take advantage of a variety of resources, including online training courses, study guides, and practice exams. Docker also offers an official DCA study guide, which covers all the topics that are covered on the exam, as well as hands-on labs and exercises to help candidates develop their skills. With the right preparation and study, candidates can earn the DCA certification and take their Docker skills to the next level.

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Docker Certified Associate (DCA) Exam Sample Questions (Q80-Q85):

NEW QUESTION # 80
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: Tag the image with 'nginx:immutable'.

  • A. No
  • B. Yes

Answer: A

Explanation:
Tagging the image with 'nginx:immutable' 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.Tagging the image with 'nginx:immutable' will only create a new tag for the image, but it will not prevent the original tag from being overwritten. To prevent an image tag from being overwritten in Docker Trusted Registry, the user can use the DTR web UI to make the tag immutable1. This will prevent anyone from pushing a new image with the same tag, even if they have push access to the repository1. Alternatively, the user can also use the DTR API to make the tag immutable2. Reference: Prevent tags from being overwritten), DTR API reference)


NEW QUESTION # 81
Does this command display all the pods in the cluster that are labeled as 'env: development'?
Solution: 'kubectl get pods --all-namespaces -label env=development'

  • A. No
  • B. Yes

Answer: A

Explanation:
= The command kubectl get pods --all-namespaces -label env=development is not valid because it has a syntax error. The correct syntax for listing pods with a specific label is kubectl get pods --all-namespaces --selector label=value or kubectl get pods --all-namespaces -l label=value. The error in the command is:
The option flag for specifying the label selector is --selector or -l, not -label. For example, -label env=development should be --selector env=development or -l env=development.
The correct command for listing all the pods in the cluster that are labeled as env: development is:
kubectl get pods --all-namespaces --selector env=development
This command will display the name, status, restarts, and age of the pods that have the label env: development in all namespaces.
Labels | Kube by Example : kubectl Cheat Sheet | Kubernetes


NEW QUESTION # 82
During development of an application meant to be orchestrated by Kubernetes, you want to mount the /data directory on your laptop into a container.
Will this strategy successfully accomplish this?
Solution: Add a volume to the pod that sets hostPath.path: /data, and then mount this volume into the pod's containers as desired.

  • A. No
  • B. Yes

Answer: A

Explanation:
Explanation
The solution will not work because a hostPath volume mounts a file or directory from the host node's filesystem into the pod, not from the laptop1. The host node is the VM or machine where the pod is scheduled to run, not the machine where the kubectl commands are executed. Therefore, the /data directory on the laptop will not be accessible to the pod unless it is also present on the host node. A better solution would be to use a persistent volume that can be accessed from any node in the cluster, such as NFS, AWS EBS, or Azure Disk2. References:
* 1: Volumes | Kubernetes
* 2: Persistent Volumes | Kubernetes


NEW QUESTION # 83
You want to provide a configuration file to a container at runtime. Does this set of Kubernetes tools and steps accomplish this?
Solution: Mount the configuration file directly into the appropriate pod and container using the .spec.containers.configMounts key.

  • A. No
  • B. Yes

Answer: A

Explanation:
The solution given is not a valid way to provide a configuration file to a container at runtime using Kubernetes tools and steps. The reason is that there is no such key as .spec.containers.configMounts in the PodSpec. The correct key to use is .spec.containers.volumeMounts, which specifies the volumes to mount into the container's filesystem1. To use a ConfigMap as a volume source, one needs to create a ConfigMap object that contains the configuration file as a key-value pair, and then reference it in the .spec.volumes section of the PodSpec2. A ConfigMap is a Kubernetes API object that lets you store configuration data for other objects to use3. For example, to provide a nginx.conf file to a nginx container, one can do the following steps:
Create a ConfigMap from the nginx.conf file:
kubectl create configmap nginx-config --from-file=nginx.conf
Create a Pod that mounts the ConfigMap as a volume and uses it as the configuration file for the nginx container:
apiVersion: v1
kind: Pod
metadata:
name: nginx-pod
spec:
containers:
- name: nginx
image: nginx
volumeMounts:
- name: config-volume
mountPath: /etc/nginx/nginx.conf
subPath: nginx.conf
volumes:
- name: config-volume
configMap:
name: nginx-config
:
Configure a Pod to Use a Volume for Storage | Kubernetes
Configure a Pod to Use a ConfigMap | Kubernetes
ConfigMaps | Kubernetes


NEW QUESTION # 84
What is the difference between a resource limit and a resource reservation when scheduling services?

  • A. A resource limit and a resource reservation can be used interchangeably.
  • B. A resource limit is a soft limit for your service, while a reservation is hard limit and the docker engine will do its best to keep your service at the limit.
  • C. A resource limit is hard limit for your service, while a reservation is used to find a host with adequate resources for scheduling. Correct
  • D. A resource limit is used to find a host with adequate resources for scheduling a hard limit for your service, while a reservation is hard limit for your service.

Answer: A


NEW QUESTION # 85
......

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