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Docker DCA Exam - Topic 1 Question 100 Discussion

Actual exam question for Docker's DCA exam
Question #: 100
Topic #: 1
[All DCA Questions]

In Docker Trusted Registry, is this how a user can prevent an image, such as 'nginx:latest', from being overwritten by another user with push access to the repository?

Solution: Tag the image with 'nginx:immutable'.

Show Suggested Answer Hide Answer
Suggested Answer: B

: Tagging the image with 'nginx:immutable' isnothow a user can prevent an image, such as 'nginx:latest', from being overwritten by another user with push access to the repository. Tagging the image with 'nginx:immutable' will only create a new tag for the image, but it will not prevent the original tag from being overwritten.To prevent an image tag from being overwritten in Docker Trusted Registry, the user can use the DTR web UI to make the tag immutable1.This will prevent anyone from pushing a new image with the same tag, even if they have push access to the repository1.Alternatively, the user can also use the DTR API to make the tag immutable2.Reference:Prevent tags from being overwritten), DTR API reference)


by Rickie at Sep 16, 2024, 01:29 PM

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Shawna
3 months ago
I've heard mixed things about this approach.
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Brittni
3 months ago
Wait, can you really prevent overwrites just by tagging?
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Paz
3 months ago
Totally agree, immutability is key for stability!
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Roosevelt
4 months ago
I thought 'nginx:latest' was already safe from overwrites.
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Glen
4 months ago
That's correct, tagging with 'nginx:immutable' works!
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Janine
4 months ago
I thought we learned that just tagging an image doesn't guarantee it won't be overwritten, so I might lean towards 'No' on this one.
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Felicidad
4 months ago
I feel like the answer is 'Yes' because immutability should prevent changes, but I also remember something about permissions being important too.
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Amber
4 months ago
I remember a practice question where we discussed image immutability, but I can't recall if tagging is the right approach in this case.
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Casie
5 months ago
I think tagging the image as 'nginx:immutable' might be a way to prevent overwriting, but I'm not entirely sure if that's the only method.
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Willow
5 months ago
This looks like a good test of my Docker knowledge. Tagging an image as 'immutable' to prevent it from being overwritten seems like a logical solution, but I want to double-check the specifics of how that works in the Docker Trusted Registry context before answering.
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Lenna
5 months ago
Okay, so the question is asking if tagging an image as 'nginx:immutable' is the way to prevent it from being overwritten in Docker Trusted Registry. I'm not too familiar with Docker Trusted Registry, but the solution provided sounds like it could be the right approach.
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Mila
5 months ago
Hmm, this seems like a straightforward question about Docker image tagging. I think the key is to understand how to prevent an image from being overwritten, which the solution mentions can be done by tagging the image as 'nginx:immutable'.
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Pansy
5 months ago
I'm a bit confused by this question. I know Docker allows you to tag images, but I'm not sure if 'immutable' is a standard tag or if that's a special feature of Docker Trusted Registry. I'll need to do some research on that specific registry to be sure of the answer.
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Ernie
1 year ago
Interesting approach, but I'm not sure if it's the most efficient way to handle image versioning in a shared environment.
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Andra
1 year ago
Ah, the good old 'immutable' tag. It's like a digital version of putting your name on your lunchbox in kindergarten.
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Santos
1 year ago
The solution seems straightforward enough, but I wonder if there's a more elegant way to prevent image overwrites.
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Dominga
1 year ago
I'm no Docker expert, but 'immutable' sounds like a fancy way of saying 'don't touch this, it's mine!'
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Denny
1 year ago
Tagging the image with 'nginx:immutable'? That's like putting a lock on a revolving door!
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Dusti
1 year ago
User 3: Yes
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Ruth
1 year ago
User 2: No
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Brynn
1 year ago
User 1: Yes
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Lino
1 year ago
Wait, so I can't just push a new 'nginx:latest' and overwrite the old one? What is this, amateur hour? Time to break out the Docker daemon's private key and have some fun.
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Luke
1 year ago
Hmm, 'immutable' tag, huh? Sounds like a great way to lock down your critical images. Just hope no one tries to 'rm -rf /' the registry server by accident.
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Alverta
1 year ago
User3: Agreed, better safe than sorry.
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An
1 year ago
User2: Definitely, 'immutable' tag is a good security measure.
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Clarence
1 year ago
User1: Yes
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Sena
1 year ago
Nah, that's not gonna work. The 'immutable' tag is just a suggestion, not an actual enforcement. Anyone with push access can still overwrite the image if they really want to.
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Amber
1 year ago
True, it's more of a convention than a restriction.
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Juliana
1 year ago
Yeah, I agree. It's not foolproof.
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Tanesha
1 year ago
B) No
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Alpha
1 year ago
A) Yes
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Andrew
1 year ago
I agree with Kizzy, tagging the image as 'nginx:immutable' seems like a good solution to prevent overwrite.
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Luke
1 year ago
No, I think there might be other ways to prevent image overwrite in Docker Trusted Registry.
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Kizzy
1 year ago
Yes, tagging the image as 'nginx:immutable' will prevent it from being overwritten.
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Noah
1 year ago
Tagging an image as 'immutable' is a pretty smart way to prevent it from being overwritten. Kudos to the Docker Trusted Registry team for coming up with this feature!
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Katlyn
1 year ago
I always tag my important images as 'immutable' to avoid any accidental changes.
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Detra
1 year ago
Definitely, it adds an extra layer of security to the repository.
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Jamal
1 year ago
That's a great feature, it really helps with image management.
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Alonso
1 year ago
Yes
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