[Dec 22, 2023] 100% Pass Guarantee for DCA Dumps with Actual Exam Questions
Today Updated DCA Exam Dumps Actual Questions
NEW QUESTION # 23
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
Explanation:
Explanation
Using --link to access the container on the bridge network does not make the container reachable from its host's network. The --link option allows containers to communicate with each other using a private network created by Docker. To make a container reachable from its host's network, you need to use either EXPOSE or
--publish to access the containers on the bridge network. References: https://docs.docker.com/network/links/,
https://docs.docker.com/network/bridge/
NEW QUESTION # 24
Will this action upgrade Docker Engine CE to Docker Engine EE?
Solution: Manually download the 'docker-ee' package
- A. No
- B. Yes
Answer: B
NEW QUESTION # 25
Is this the purpose of Docker Content Trust?
Solution.Indicate an image on Docker Hub is an official image.
- A. Yes
- B. No
Answer: B
Explanation:
Explanation
The purpose of Docker Content Trust is not to indicate an image on Docker Hub is an official image. Docker Content Trust is a feature that allows users to verify the integrity and publisher of container images they pull or deploy from a registry server, signed on a Notary server1. Docker Content Trust uses digital signatures to ensure that the images are authentic and have not been tampered with2. Official images are a curated set of Docker repositories that are designed to be the best starting point for most users3. They are not necessarily signed by Docker Content Trust, although some of them are. To indicate an image on Docker Hub is an official image, you can look for the blue "official image" badge on the image page. References:
* Content trust in Docker | Docker Docs
* Docker Content Trust: What It Is and How It Secures Container Images
* Official Images on Docker Hub | Docker Docs
* [Docker Hub Quickstart | Docker Docs]
NEW QUESTION # 26
Is this a type of Linux kernel namespace that provides container isolation?
Solution.Process ID
- A. No
- B. Yes
Answer: B
Explanation:
Explanation
Process ID is a type of Linux kernel namespace that provides container isolation. Linux namespaces are a feature of the Linux kernel that isolate and virtualize system resources of a collection of processes1. Process ID namespace isolates the process ID number space, meaning that processes in different PID namespaces can have the same PID2. This allows each container to have its own init process with PID 1, which is the ancestor of all other processes in the container3. Process ID namespace also affects other identifiers, such as thread IDs, parent process IDs, and session IDs4. References: Namespaces in operation), pid_namespaces), What is a PID namespace?, Linux Namespaces: PID)
NEW QUESTION # 27
In the context of a swarm mode cluster, does this describe a node?
Solution: an instance of the Docker engine participating in the swarm
- A. No
- B. Yes
Answer: B
NEW QUESTION # 28
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, use it to populate a volume associated with the pod, and mount that file from the volume to the appropriate container and path.
- A. Yes
- B. No
Answer: B
Explanation:
Explanation
= Mounting the configuration file directly into the appropriate pod and container using the
.spec.containers.configMounts key is not a valid way to provide a configuration file to a container at runtime. The .spec.containers.configMounts key does not exist in the Kubernetes API1. The correct way to provide a configuration file to a container at runtime is to use a ConfigMap2. A ConfigMap is a Kubernetes object that stores configuration data as key-value pairs. You can create a ConfigMap from a file, and then mount the ConfigMap as a volume into the pod and container. The configuration file will be available as a file in the specified mount path3. Alternatively, you can also use environment variables to pass configuration data to a container from a ConfigMap4. References:
* PodSpec v1 core
* Configure a Pod to Use a ConfigMap
* Populate a Volume with data stored in a ConfigMap
* Define Container Environment Variables Using ConfigMap Data
NEW QUESTION # 29
You add a new user to the engineering organization in DTR.
Will this action grant them read/write access to the engineering/api repository?
Solution. Mirror the engineering/api repository to one of the user's own private repositories.
- A. Yes
- B. No
Answer: B
Explanation:
Explanation
Mirroring the engineering/api repository to one of the user's own private repositories does not grant them read/write access to the engineering/api repository. Mirroring is a feature that allows you to automatically replicate images from one repository to another, either within the same DTR or across different DTRs.
Mirroring does not change the permissions or access levels of the source or destination repositories. It only copies the images and tags from one repository to another. To grant a user read/write access to the engineering/api repository, you need to add them as a collaborator with read/write role on that repository, or add them to a team that has read/write role on that repository. References:
https://docs.docker.com/ee/dtr/user/manage-images/mirror-repository-images/,
https://docs.docker.com/ee/dtr/user/manage-repositories/set-repository-permissions/
NEW QUESTION # 30
Is this the purpose of Docker Content Trust?
Solution: Enable mutual TLS between the Docker client and server.
- A. Yes
- B. No
Answer: B
NEW QUESTION # 31
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
NEW QUESTION # 32
You want to create a container that is reachable from its host's network. Does this action accomplish this?
Solution: Use network attach to access the containers on the bridge network
- A. Yes
- B. No
Answer: B
Explanation:
Explanation
Using network attach to access the containers on the bridge network does not make the container reachable from its host's network. The network attach option connects a running container to another network, but it does not expose any ports to the host. To make a container reachable from its host's network, you need to use either EXPOSE or --publish to access the containers on the bridge network. References:
https://docs.docker.com/engine/reference/commandline/network_connect/,
https://docs.docker.com/config/containers/container-networking/
NEW QUESTION # 33
Will this sequence of steps completely delete an image from disk in the Docker Trusted Registry?
Solution.Delete the image and delete the image repository from Docker Trusted Registry.
- A. Yes
- B. No
Answer: B
Explanation:
Explanation
The sequence of steps will not completely delete an image from disk in the Docker Trusted Registry. Deleting an image and deleting an image repository from the Docker Trusted Registry will only remove the references to the image, but not the actual image data on the disk1. To completely delete an image from disk, you need to run the garbage collection command on the registry server, which will delete any unreferenced blobs2. The garbage collection command is bin/registry garbage-collect /path/to/config.yml3. References: Deleting an image), Garbage collection), Running garbage collection)
NEW QUESTION # 34
In the context of a swarm mode cluster, does this describe a node?
Solution.an instance of the Docker CLI connected to the swarm
- A. Yes
- B. No
Answer: B
Explanation:
Explanation
The statement does not describe a node in the context of a swarm mode cluster. A node is a physical or virtual machine running Docker Engine 1.12 or later in swarm mode1. An instance of the Docker CLI connected to the swarm is not a node, but a client that can interact with the swarm through the Docker API2. The Docker CLI can be used to create a swarm, join nodes to a swarm, deploy services to a swarm, and manage swarm behavior3. References: How nodes work), Docker CLI), Swarm mode overview)
NEW QUESTION # 35
Will this Linux kernel facility limit a Docker container's access to host resources, such as CPU or memory?
Solution: namespaces
- A. Yes
- B. No
Answer: B
Explanation:
Explanation
Using namespaces does not limit a Docker container's access to host resources, such as CPU or memory.
Namespaces are a Linux kernel feature that provide isolation and virtualization of system resources for processes. They can be used to create isolated environments for containers that have their own view of system resources, such as process IDs, user IDs, network interfaces, etc. However, they do not control how much resources a container can use or access. References: https://docs.docker.com/engine/security/userns-remap/,
https://man7.org/linux/man-pages/man7/namespaces.7.html
NEW QUESTION # 36
Is this a supported user authentication method for Universal Control Plane?
Solution.x.500
- A. Yes
- B. No
Answer: B
Explanation:
Explanation
x.500 is not a supported user authentication method for Universal Control Plane (UCP). UCP supports two types of user authentication methods: built-in and external1. Built-in authentication uses the UCP's own database to store and verify user credentials. External authentication uses an external LDAP or Active Directory service to manage user accounts and passwords1. x.500 is a standard for directory services, which can be used by LDAP or Active Directory, but it is not a user authentication method by itself2. References:
* User authentication | Docker Docs
* X.500 - Wikipedia
NEW QUESTION # 37
Is this the purpose of Docker Content Trust?
Solution: Verify and encrypt Docker registry TLS.
- A. No
- B. Yes
Answer: B
NEW QUESTION # 38
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/udp dns-cache'
- A. No
- B. Yes
Answer: B
Explanation:
Explanation
This command creates a swarm service that only listens on port 53 using the UDP protocol, because the -p flag specifies the published port and target port separated by a colon (:) and followed by the protocol name (/udp).
According to the official documentation, this is an example of using the short version of the publish option to expose a port for a service.
References:
https://docs.docker.com/engine/reference/commandline/service_create/#publish-service-ports-externally-to-the-s
NEW QUESTION # 39
Will this command display a list of volumes for a specific container?
Solution: 'docker container inspect nginx'
- A. No
- B. Yes
Answer: B
Explanation:
Explanation
This command will display a list of volumes for a specific container, because it uses docker container inspect to show detailed information about a container, including its volumes. According to the official documentation, docker container inspect will show the Mounts section that contains information about all volumes mounted by the container.
References: https://docs.docker.com/engine/reference/commandline/container_inspect/
https://docs.docker.com/storage/volumes/#start-a-container-with-a-volume
NEW QUESTION # 40
Which 'docker run' flag lifts cgroup limitations?
- A. 'docker run --privileged'
- B. 'docker run --cap-drop'
- C. 'docker run --isolation'
- D. 'docker run --cpu-period'
Answer: A
NEW QUESTION # 41
......
What is the duration, language, and format of Docker Certified Associate Exam
- Type of Questions: Multiple choice, Multiple answers
- Length of Examination: 90 mins
- language: English
- Passing score: 65%
- Number of Questions: 55
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