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How to Prepare For Docker Certified Associate Exam
Preparation Guide for Docker Certified Associate Exam
Introduction
Docker is one of the open-source technology and very much demanding these days in IT, It had brought a revolution in the container technology, Docker has created a track for certification where an individual can appear and validate their skill set. This certification program will provide Docker Cloud Certified Associate a way to demonstrate their skills. The assessment is based on a rigorous exam using the industry-standard methodology to determine whether a candidate meets Docker's proficiency standards.
According to Docker, a DCA Certified Professional enables organizations will able to provision containers as and when they required using container images.
Certification is evidence of your skills, expertise in those areas in which you like to work. If the candidate wants to work on Docker Containerization technologies and prove his knowledge, certification is offered by Docker. This DCA Exam Certification helps a candidate to validates his skills in Docker Containerization technologies.
In this guide, we will cover the Docker Certified Associate Certification exam, Docker Certified Associate Certified professional salary and all aspects of the Docker Certified Associate Certification.
NEW QUESTION 11
You want to provide a configuration file to a container at runtime. Does this set of Kubernetes tools and steps accomplish this?
Solution: Turn the configuration file into a configMap object and mount it directly into the appropriate pod and container using the .spec.containers.configMounts key.
- A. Yes
- B. No
Answer: B
NEW QUESTION 12
You want to create a container that is reachable from its host's network. Does this action accomplish this?
Solution: Use --link to access the container on the bridge network.
- A. Yes
- B. No
Answer: B
NEW QUESTION 13
Which of the following commands starts a Redis container and configures it to always restart unless it is
explicitly stopped or Docker is restarted?
- A. 'docker run -d --restart omit-stopped redis'
- B. 'docker run -d --failure omit-stopped redis'
- C. 'docker run -d --restart unless-stopped redis'
- D. 'docker run -d --restart-policy unless-stopped redis'
Answer: C
NEW QUESTION 14
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
NEW QUESTION 15
The output of which command can be used to find the architecture and operating system an image is compatible with?
- A. docker image info <image-id>
- B. docker image ls <image-id>
- C. docker image inspect --format {{.Architecture}} {{.OS}} ' <image-id>
- D. docker image inspect --filter {{.Architecture}} {{.OS}} ' <image-id>
Answer: C
NEW QUESTION 16
Which flag for a service would allow a container to consume more than 2 GB of memory only when there is no memory contention but would also prevent a container from consuming more than 4GB of memory, in any case?
- A. --memory-swap 4GB --limit-memory 2GB
- B. --memory-swap 2GB --limit-memory 4GB
- C. --limit-memory 2GB --reserve-memory 4GB
- D. --limit-memory 4GB --reserve-memory 2GB
Answer: B
NEW QUESTION 17
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: Create a PersistentVolume with storageciass: "" and hostPath: /data, and a persistentVolumeClaim requesting this PV. Then use that PVC to populate a volume in a pod
- A. No
- B. Yes
Answer: B
NEW QUESTION 18
A user is having problems running Docker. Which of the following will start Docker in debug mode?
- A. Start the 'dockerd' process manually with the '--raw-logs' flag set to debug
- B. Set the logging key to debug in the 'daemon.json' file.
- C. Start the 'dockerd' process manually with the '--logging' flag set to debug
- D. Set the debug key to true in the 'daemon.json' file.
Answer: D
NEW QUESTION 19
You have created a Docker bridge network on a host with three containers attached, how do you make this containers accessible outside of the host?
- A. Use network attach to access the containers on the bridge network
- B. Use either EXPOSE or --publish to access the containers on the bridge network
- C. Use network connect to access the containers on the bridge network
- D. Use --link to access the containers on the bridge network
Correct
Answer: B
NEW QUESTION 20
Will this command ensure that overlay traffic between service tasks is encrypted?
Solution: docker service create --network --encrypted
- A. Yes
- B. No
Answer: B
NEW QUESTION 21
From a DevOps process standpoint, it is best practice to keep changes to an application in version control.
Which of the following will allow changes to a docker Image to be stored in a version control system?
- A. docker save
- B. docker commit
- C. A docker-compose.yml file
- D. A dockerfile
Answer: B
NEW QUESTION 22
Is this a way to configure the Docker engine to use a registry without a trusted TLS certificate?
Solution: Pass the '--insecure-registry' flag to the daemon at run time.
- A. No
- B. Yes
Answer: B
NEW QUESTION 23
The Kubernetes yaml shown below describes a networkPolicy.
Will the networkPolicy BLOCK this traffic?
Solution: a request issued from a pod bearing the tier: backend label, to a pod bearing the tier: frontend label
- A. Yes
- B. No
Answer: B
NEW QUESTION 24
Which set of commands can identify the publishd port(s) for a container? (Choose 1.)
- A. 'docker port inspect', 'docker container inspect'
- B. 'docker network inspect','docker port'
- C. 'docker info','docker network inspect'
- D. 'docker container inspect', docker port'
Answer: D
NEW QUESTION 25
Which of the following commands is used to display system-wide Docker configuration on a host?
- A. docker inspect
- B. docker info
- C. docker system
- D. docker status
Answer: B
NEW QUESTION 26
Will this command ensure that overlay traffic between service tasks is encrypted?
Solution: docker network create -d overlay --secure
- A. Yes
- B. No
Answer: B
NEW QUESTION 27
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 one namespace for each application and add all the resources to it.
- A. Yes
- B. No
Answer: B
NEW QUESTION 28
A persistentVolumeClaim (PVC) is created with the specification storageClass: "", and size requirements that cannot be satisfied by any existing persistentVolume.
Is this an action Kubernetes takes in this situation?
Solution: The PVC remains unbound until a persistentVolume that matches all requirements of the PVC becomes available.
- A. No
- B. Yes
Answer: B
NEW QUESTION 29
Your organization has a centralized logging solution, such as Splunk.
Will this configure a Docker container to export container logs to the logging solution?
Solution: docker logs <container-id>
- A. Yes
- B. No
Answer: B
NEW QUESTION 30
Which one of the following commands will result in the volume being removed automatically once the container has exited?
- A. 'docker run --remove -v /foo busybox'
- B. 'docker run --del -v /foo busybox'
- C. 'docker run --read-only -v /foo busybox'
- D. 'docker run --rm -v /foo busybox'
Answer: D
NEW QUESTION 31
Is this a type of Linux kernel namespace that provides container isolation?
Solution: Storage
- A. Yes
- B. No
Answer: B
NEW QUESTION 32
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: Use the DTR web Ul to make all tags in the repository immutable.
- A. No
- B. Yes
Answer: B
NEW QUESTION 33
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: B
NEW QUESTION 34
Can this set of commands identify the published port(s) for a container?
Solution: docker container inspect', 'docker port'
- A. No
- B. Yes
Answer: B
NEW QUESTION 35
Will this action upgrade Docker Engine CE to Docker Engine EE?
Solution: Delete '/var/lib/docker' directory.
- A. Yes
- B. No
Answer: B
NEW QUESTION 36
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How to book the Docker Certified Associate Exam
There are the following steps for registering the Docker Certified Associate exam:
- Step 1: Visit to Docker Examity proctors.
- Step 2: Sign up/Login to Docker account.
- Step 3: Make payment for the exam voucher using your credit or debit card.
- Step 4: You will receive exam voucher code on your email and then using that voucher code you can book your exam by selecting dates, time etc.
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