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Quiz Perfect DCA - Docker Certified Associate (DCA) Exam Testdump

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Docker Certified Associate (DCA) exam is a certification program that measures the skills and knowledge of an individual in containerization using Docker. It is an online, proctored exam that is designed to test the candidate's ability to work with Docker containers, images, networks, and storage. DCA Exam is based on the latest version of Docker, ensuring that candidates are tested on the most up-to-date technology.

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Docker Certified Associate (DCA) certification exam is a popular certification for IT professionals who work with Docker container technology. Docker is a popular platform for building, shipping, and running distributed applications. The DCA certification is designed to validate the skills and knowledge of an individual in Docker container technology. DCA Exam measures the knowledge of the candidates in various areas such as Docker architecture, installation and configuration, Docker networking, security, and troubleshooting.

Docker Certified Associate (DCA) Exam Sample Questions (Q151-Q156):

NEW QUESTION # 151
Is this an advantage of multi-stage builds?
Solution: faster image builds by allowing parallel execution of Docker builds

A. No
B. Yes

Answer: A

Explanation:
= Simultaneously creating and tagging multiple images is not an advantage of multi-stage builds. Multi-stage builds are a feature that allows you to use multiple FROM statements in your Dockerfile, each starting a new stage of the build1. You can selectively copy artifacts from one stage to another, leaving behind everything you don't want in the final image. This helps you to optimize the size and security of your images, as well as to simplify your build process12. However, multi-stage builds do not create or tag multiple images at once. Each Dockerfile produces one final image, which is the result of the last stage in the Dockerfile1. If you want to create and tag multiple images from a single Dockerfile, you need to use the --target option with the docker build command, and specify the name of the stage you want to build and tag3. References:
* Multi-stage builds | Docker Docs
* What Are Multi-Stage Docker Builds? - How-To Geek
* Stop at a specific build stage | Docker Docs

NEW QUESTION # 152
Does this command create a swarm service that only listens on port 53 using the UDP protocol?
Solution: 'docker service create -name dns-cache -p 53:53 -service udp dns-cache'

A. No
B. Yes

Answer: A

Explanation:
Explanation
This command does not create a swarm service that only listens on port 53 using the UDP protocol, because it has several syntax errors and missing options. According to the official documentation, the correct command should be:
docker service create --name dns-cache -p 53:53/udp --mode global dns-cache The errors and missing options are:
The --name flag is missing a dash (-).
The -p flag is missing the /udp suffix to specify the protocol.
The --service flag does not exist and should be replaced by --mode to specify the service mode.
The global option should follow the --mode flag to indicate that one task should run on each node.
References:
https://docs.docker.com/engine/reference/commandline/service_create/#publish-service-ports-externally-to-the-s
https://docs.docker.com/engine/reference/commandline/service_create/#specify-service-mode-mode
https://docs.docker.com/engine/reference/commandline/service_create/#options

NEW QUESTION # 153
Will this action upgrade Docker Engine CE to Docker Engine EE?
Solution. Run docker engine activate.

A. No
B. Yes

Answer: B

Explanation:
Running docker engine activate will upgrade Docker Engine CE to Docker Engine EE. This is a feature that allows you to switch from the Community Edition to the Enterprise Edition without reinstalling Docker or losing any data. You need to have a valid license file and a subscription to Docker EE to use this feature1. Docker EE is a premium version of Docker CE that offers additional features, such as security scanning, image management, and certified plugins23. References:
* Upgrade Docker Engine | Docker Docs
* What is the exact difference between Docker EE (Enterprise Edition), Docker CE (Community Edition) and Docker (Custom Support) - Stack Overflow
* Docker Community Edition or Docker Enterprise Edition - Docker | BoxBoat

NEW QUESTION # 154
You set up an automatic pruning policy on a DTR repository to prune all images using Apache licenses. What effect does this have on images in this repository?

A. Matching images are deleted during the next prune Job.
B. Matching Images are untagged during the next prune job.
C. Matching images are untagged during the next prune job, and subsequently deleted once they are older than the pruning threshold set in the repository's Settings tab.
D. Matching images are untagged once they are older than the pruning threshold set in the repository's Settings tab.

Answer: D

NEW QUESTION # 155
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 describe deployment api

A. No
B. Yes

Answer: B

Explanation:
Explanation
Using kubectl describe deployment api displays the events table for this object. The kubectl describe command shows detailed information about a resource, including its status and events. This command can be used to troubleshoot a deployment that is not working as expected. References:
https://kubernetes.io/docs/reference/generated/kubectl/kubectl-commands#describe

NEW QUESTION # 156
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