Newest DCA Exam Collection - DCA Practice Torrent & DCA Actual Pdf

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Docker Certified Associate (DCA) Exam Sample Questions (Q171-Q176):

NEW QUESTION # 171
In Docker Trusted Registry, how would a user prevent an image, for example 'nginx:latest' from being overwritten by another user with push access to the repository?

A. Remove push access from all other users.
B. Tag the image with 'nginx:immutable'
C. Use the DTR web UI to make the tag immutable.
D. Keep a backup copy of the image on another repository.

Answer: C

NEW QUESTION # 172
You want to create a container that is reachable from its host's network. Does this action accomplish this?
Solution: Use either EXPOSE or --publish to access the containers on the bridge network

A. Yes
B. No

Answer: A

Explanation:
Explanation
Using either EXPOSE or --publish to access the containers on the bridge network makes the container reachable from its host's network. The EXPOSE instruction in the Dockerfile specifies which ports the container listens on at runtime, while the --publish option maps a port on the host to a port in the container.
Both options allow external access to the container's services. References:
https://docs.docker.com/engine/reference/builder/#expose,
https://docs.docker.com/config/containers/container-networking/

NEW QUESTION # 173
Can this set of commands identify the published port(s) for a container?
Solution. 'docker container inspect", docker port'

A. Yes
B. No

Answer: B

Explanation:
Explanation
The set of commands docker container inspect and docker port cannot identify the published port(s) for a container. The docker container inspect command returns low-level information on a container, such as its ID, name, state, network settings, mounts, etc1. However, it does not show the port mappings between the container and thehost2. The docker port command lists the port mappings or a specific mapping for a container, but it requires the container name or ID as an argument3. Therefore, to identify the published port(s) for a container, you need to use both commands together, such as docker port $(docker container inspect -f
'{{.Name}}' CONTAINER)4. References:
* docker container inspect | Docker Docs
* How to inspect a running Docker container - Stack Overflow
* docker port | Docker Docs
* List port for Docker container using command line - Stack Overflow

NEW QUESTION # 174
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:
= Mirroring the engineering/api repository to one of the user's own private repositories will not grant them read/write access to the original repository. Mirroring is a feature that allows users to automatically sync images from one repository to another, either within the same DTR or across different DTRs. Mirroring does not affect the permissions or roles of the users or teams associated with the source or destination repositories.
To grant a user read/write access to the engineering/api repository, the user needs to be added to a team that has the appropriate role for that repository, or the repository needs to be configured with the appropriate visibility and access settings. References:
* Mirror repositories
* Manage access to repositories
* Manage teams

NEW QUESTION # 175
Seven managers are in a swarm cluster.
Is this how should they be distributed across three datacenters or availability zones?
Solution: 3-2-2

A. Yes
B. No

Answer: B

Explanation:
Explanation
= Distributing seven managers across three datacenters or availability zones as 3-2-2 is not a good way to ensure high availability and fault tolerance. This is because a swarm cluster requires a majority of managers (more than half) to be available and able to communicate with each other in order to maintain the swarm state and avoid a split-brain scenario1. If one of the datacenters or availability zones with three managers goes down, the remaining four managers will not have a quorum and the swarm will stop functioning. A better way to distribute seven managers across three datacenters oravailability zones is 3-3-1 or 3-2-1-1, which will allow the swarm to survive the loss of one or two datacenters or availability zones, respectively2. References:
* Administer and maintain a swarm of Docker Engines | Docker Docs
* How to Create a Cluster of Docker Containers with Docker Swarm and DigitalOcean on Ubuntu 16.04 | DigitalOcean

NEW QUESTION # 176
......

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Newest DCA Exam Collection - DCA Practice Torrent & DCA Actual Pdf

100% Pass Quiz Docker - DCA –Professional Practice Test Online

Docker Certified Associate (DCA) Exam Sample Questions (Q171-Q176):

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