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IT業種が新しい業種で、経済発展を促進するチェーンですから、極めて重要な存在だということを良く知っています。PassTestの DockerのDCA試験トレーニング資料は高度に認証されたIT領域の専門家の経験と創造を含めているものです。その権威性は言うまでもありません。あなたはPassTestの学習教材を購入した後、私たちは一年間で無料更新サービスを提供することができます。
| Section | Weight | Objectives |
|---|---|---|
| Security | 15% | - Describe the security architecture and responsibilities of the Docker EE platform - Compare the UCP workers and managers - Describe swarm default security - Describe MTLS - Describe UCP and DTR integration with LDAP/AD - Describe default engine security - Describe the difference between UCP and DTR - Describe MTLS and identity roles - Configure RBAC with UCP - Describe identity roles - Enable Docker Content Trust - Describe the process to sign a Docker image |
| Installation and Configuration | 15% | - Use the install command to install DTR (Docker Trusted Registry) - Complete setup of repo, select a storage driver, and complete installation of Docker engine on multiple platforms - Outline the sizing requirements prior to installation - Setup swarm, configure managers, add nodes, and setup the backup schedule - Describe the use of UCP (Universal Control Plane) - Demonstrate the ability to upgrade the Docker engine - Describe the interaction between Docker and Linux - Interpret errors to troubleshoot installation issues without assistance - Create and manager user and teams - Describe namespaces, cgroups, and configuration of certificates - Configure logging drivers (splunk, journald, etc.) |
| Storage and Volumes | 10% | - Describe how to use a volume plugin (local vs. NFS) - Identify the steps to take to clean up unused images on a filesystem and DTR - Describe how volumes work with containers - Describe the different graph driver storage backends - Describe the storage models available for DTR (NFS, local) - Describe the use of tmpfs for ephemeral storage |
| Networking | 15% | - Identify which IP and port a container is externally accessible on - Describe the differences between "host" and "ingress" port publishing mode - Understand the Container Network Model and how it interfaces with the Docker engine and network and IPAM drivers - Publish a port so that an application is accessible externally - Describe how to install a remote driver to a specific infrastructure provider - Troubleshoot container and engine logs to understand a connectivity issue between containers - Create a Docker bridge network for a developer to use for their containers - Describe the different types and use cases for the built-in network drivers - Configure Docker to use external DNS |
| Image Creation, Management, and Registry | 20% | - Use CLI commands such as list, delete, prune, rmi, etc. to manage images - Identify and display the main parts of a Dockerfile - Give examples on how to create an efficient image via a Dockerfile - Describe options, such as add, copy, volumes, expose, entry point - Describe the use of Dockerfile - Describe how to set up and use a local registry - Demonstrate tagging an image - Utilize a registry to store an image - Inspect images and report specific attributes using filter and format - Apply a file to create a new image - Describe how image layers work - Describe how an image registry works - Display layers of a Docker image |
| Orchestration | 25% | - State the differences between running a container vs running a service - Extend the instructions to run individual containers into running services under swarm - Describe how a Dockerized application communicates with legacy systems - Describe and demonstrate how to use replication mode - Increase number of replicas - Convert an application deployment into a stack file using a YAML compose file with "docker stack deploy" - Complete the setup of a swarm mode cluster - Identify the steps needed to troubleshoot a service not deploying - Interpret the output of "docker inspect" commands - Demonstrate steps to lock a swarm cluster - Add networks, publish ports - Describe the difference between global and replicated services - Describe how to provide configuration to Kubernetes pods using configMaps and secrets - Manipulate a running stack of services - Mount volumes - Describe how to deploy containerized workloads as Kubernetes pods and deployments |
DCAガイド資料の改革に関する専門家の絶え間ない努力により、DCAテストの準備中に最短時間で集中してターゲットを絞ることができ、複雑で曖昧なコンテンツを簡素化できます。 。私たちPassTestのDCA研究急流の助けを借りて、あなたは同じ時間でより有用な何かをするためにあなたのフラグメント時間を最大限に活用することを学ぶので、あなたはあなたの仲間の労働者よりも独特です。弊社のDCA模擬テストの上記のすべてのサービスにより、より多くの時間、省エネ、省力化を実現できます。
質問 # 97
You created a new service named 'http' and discover it is not registering as healthy. Will this command enable you to view the list of historical tasks for this service?
Solution: 'docker service inspect http'
正解：B
解説：
Explanation
= The command 'docker service inspect http' will display detailed information on the 'http' service, such as its ID, name, mode, replicas, container spec, networks, ports, etc. However, it will not show the list of historical tasks for the service. To view the list of tasks, you need to use the command 'docker service ps http', which will show the ID, name, image, node, desired state, current state, and error of each task12. References:
* 1: docker service inspect | Docker Docs
* 2: docker service ps | Docker Docs
質問 # 98
In the context of a swarm mode cluster, does this describe a node?
Solution: a physical machine participating in the swarm
正解：B
質問 # 99
Will this command mount the host's '/data' directory to the ubuntu container in read-only mode?
Solution: 'docker run -v /data:/mydata --mode readonly ubuntu'
正解：B
解説：
= The command docker run -v /data:/mydata --mode readonly ubuntu is not valid because it has some syntax errors. The correct syntax for running a container with a bind mount is docker run [OPTIONS] IMAGE [COMMAND] [ARG...]. The errors in the command are:
The option flag for specifying the volume is --volume or -v, not -v. For example, -v /data:/mydata should be --volume /data:/mydata.
The option flag for specifying the mode of the volume is --mount, not --mode. For example, --mode readonly should be --mount type=bind,source=/data,target=/mydata,readonly.
The option flag for specifying the mode of the container is --detach or -d, not --mode. For example, --mode readonly should be --detach.
The correct command for running a container with a bind mount in read-only mode is:
docker run --volume /data:/mydata --mount type=bind,source=/data,target=/mydata,readonly --detach ubuntu This command will run a container using the ubuntu image and mount the host's /data directory to the container's /mydata directory in read-only mode. The container will run in the background (--detach).
docker run reference | Docker Documentation : [Use bind mounts | Docker Documentation]
質問 # 100
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.
正解：A
解説：
Explanation
Setting the log-driver and log-opt keys to values for the logging solution (Splunk) in the daemon.json file does configure a Docker container to export container logs to the logging solution. The daemon.json file is a configuration file for the Docker daemon that allows you to specify various options for the daemon, such as logging drivers, logging options, storage drivers, etc. The log-driver option sets the default logging driver for all containers, unless overridden by the --log-driver option when creating or running a container. The log-opt option sets the default options for the logging driver, such as the Splunk URL, token, source, etc. References:
https://docs.docker.com/config/containers/logging/configure/,
https://docs.docker.com/config/containers/logging/splunk/
質問 # 101
Is this the purpose of Docker Content Trust?
Solution. Indicate an image on Docker Hub is an official image.
正解：B
解説：
Explanation
Indicating an image on Docker Hub is an official image is not the purpose of Docker Content Trust. Official images are curated images that are provided and maintained by Docker, Inc. or by upstream software maintainers. Official images have a special badge on Docker Hub that indicates their status. Official images are not necessarily signed by Docker Content Trust, although some of them are. The purpose of Docker Content Trust is to sign and verify image tags, not to indicate official images. References:
https://docs.docker.com/docker-hub/official_images/, https://docs.docker.com/engine/security/trust/
質問 # 102
......
Docker人々は最近非常に忙しいので、DCA試験の準備に昼食時間を有効に活用したいと考えています。 学習ツールとしてDCA試験問題を選択した場合、問題は解決しません。 DCA試験準備のアプリはいつでもオフラインでの練習をサポートしているためです。 当社の製品を購入する場合、PassTestオフライン状態でも学習を続けることができます。 Docker Certified Associate (DCA) Examネットワーク全体の不可能な状態に影響されることはありません。 いつでもどこでも当社のDCA試験準備を使用することを選択できます
DCA試験対策: https://www.passtest.jp/Docker/DCA-shiken.html
さらに、PassTest DCAダンプの一部が現在無料で提供されています：https://drive.google.com/open?id=1ZOZWZ07NOsW7_tMX8ZtFvUShAaDiCsDq