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Docker Exam DCA Topic 4 Question 101 Discussion

Actual exam question for Docker's DCA exam
Question #: 101
Topic #: 4
[All DCA Questions]

A company's security policy specifies that development and production containers must run on separate nodes in a given Swarm cluster.

Can this be used to schedule containers to meet the security policy requirements?

Solution: label contraints

Show Suggested Answer Hide Answer
Suggested Answer: B

: = Keeping a backup copy of the image on another repository is not how a user can prevent an image, such as 'nginx:latest', from being overwritten by another user with push access to the repository. This approach does not prevent the original image from being overwritten, it only provides a way to restore it from another source. However, this may not be reliable or efficient, as the backup repository may not be in sync with the original one, or may not be accessible at all times.To prevent an image from being overwritten by another user, the user can use the DTR web UI to make the tag immutable1. This feature allows the user to lock a specific tag, so that no one can push a new image with the same tag to the repository.This ensures that the image is always consistent and secure1.Reference:

Make a tag immutable | Docker Docs


by Charlene at Sep 16, 2024, 06:36 AM

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Lashunda
9 days ago
I think the solution provided is effective in meeting the security policy requirements, so I would go with option A) Yes.
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Isaiah
13 days ago
I agree with Goldie, using label constraints is a good way to ensure containers are running on separate nodes for security purposes.
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Goldie
20 days ago
Yes, we can use label constraints to schedule containers on separate nodes.
upvoted 0 times
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