正真正銘のDCA問題集には100%合格率練習テスト問題集 [Q73-Q89]

正真正銘のDCA問題集には100%合格率練習テスト問題集

Docker DCAリアル試験問題保証付き 更新された問題集

Docker DCA 認定試験の出題範囲：

トピック	出題範囲
トピック 1	Dockerプラットフォームの保守と運用をインストールする
トピック 2	DockerEngineの構成とトラブルシューティング
トピック 3	従来のアプリケーションをコンテナに移行する
トピック 4	利害関係者からのトリアージ問題レポートと解決
トピック 5	一元化されたレジストリに保存されている既存のイメージからコンテナ化されたアプリケーションを実行する
トピック 6	新しいDocker環境を立ち上げ、一般的なメンテナンスと構成を実行する

 

質問 73
A container named "analytics" that stores results in a volume called "data" was created.
docker run -d --name=analytics -v data:/data app1
How are the results accessed in "data" with another container called "app2"?

• A. docker run -d --name=reports --volume=data app2
• B. docker run -d --name=reports --volume=app1 app2
• C. docker run -d --name=reports --mount=app1 app2
• D. docker run -d --name=reports --volumes-from=analytics app2

正解: D

 

質問 74
Will this Linux kernel facility limit a Docker container's access to host resources, such as CPU or memory?
Solution: namespaces

• A. No
• B. Yes

正解: A

 

質問 75
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: Set the log-driver and log-oPt keys to values for the logging solution (Splunk) In the daemon.json file.

• A. Yes
• B. No

正解: A

 

質問 76
What is the docker command to setup a swarm?

• A. docker init swarm
• B. docker swarm init
• C. docker swarm create
• D. docker create swarm

正解: B

解説:
https://docs.docker.com/engine/reference/commandline/swarm/

 

質問 77
Which of the following are types of namespaces used by Docker to provide isolation? (Choose 2.)

• A. Authentication
• B. Host
• C. Process ID
• D. Network
• E. Storage

正解: C,D

 

質問 78
Which of the following commands is used to display system-wide Docker configuration on a host?

• A. docker inspect
• B. docker system
• C. docker info
• D. docker status

正解: C

 

質問 79
Seven managers are in a swarm cluster.
Is this how should they be distributed across three datacenters or availability zones?
Solution: 3-3-1

• A. No
• B. Yes

正解: A

 

質問 80
What is one way of directly transferring a Docker Image from one Docker host in another?

• A. 'docker save' the image to save it as TAR file and copy it over to the target host. Then use 'docker load' to un-TAR the image back as a Docker image.
• B. 'docker commit' to save the image outside of the Docker filesystem. Then transfer the file over to the target host and 'docker start' to start the container again.
• C. There is no way of directly transferring Docker images between hosts. A Docker Registry must be used ad an intermediary.
• D. 'docker push' the image to the IP address of the target host.

正解: A

 

質問 81
Which of the following commands will create a swarm service which only listens on port 53 using the UDP protocol?

• A. docker service create --name dns-cache -p 53:53/udp dns-cache
• B. docker service create --name dns-cache -p 53:53 --service udp dns-cache
• C. docker service create --name dns-cache -p 53:53 --udp dns-cache
• D. docker service create --name dns-cache -p 53:53 ..constraint
  networking.protocol.udp=true dns-cache

正解: A

 

質問 82
Which of the following constitutes a production-ready devicemapper configuration for the Docker engine?

• A. Utilize the '--storage-opt dm.directlvm_device' Docker daemon option, specifying a block device
• B. Nothing, devicemapper comes ready for production usage out of the box
• C. Create a volume group in devicemapper and utilize the '--dm.thinpooldev' Docker daemon option, specifying the volume group
• D. Format a partition with xfs and mount it at '/var/lib/docker'

正解: A

解説:
Explanation

 

質問 83
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. Yes
• B. No

正解: A

 

質問 84
Is this an advantage of multi-stage builds?
Solution: better caching when building Docker images

• A. No
• B. Yes

正解: A

 

質問 85
Will this command display a list of volumes for a specific container?
Solution: docker container logs nginx --volumes'

• A. No
• B. Yes

正解: A

 

質問 86
Is this the purpose of Docker Content Trust?
Solution: Enable mutual TLS between the Docker client and server.

• A. No
• B. Yes

正解: A

 

質問 87
When seven managers are in a swarm cluster how would they be distributed across three datacenters or availability zones?

• A. 3-2-2
• B. 5-1-1
• C. 4-2-1
• D. 3-3-1

正解: A

 

質問 88
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

正解: A

 

質問 89
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