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Docker Exam DCA 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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Ernie
9 months 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
9 months 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
9 months 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
9 months 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
9 months ago
Tagging the image with 'nginx:immutable'? That's like putting a lock on a revolving door!
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Dusti
8 months ago
User 3: Yes
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Ruth
8 months ago
User 2: No
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Brynn
8 months ago
User 1: Yes
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Lino
9 months 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
9 months 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
8 months ago
User3: Agreed, better safe than sorry.
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An
8 months ago
User2: Definitely, 'immutable' tag is a good security measure.
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Clarence
9 months ago
User1: Yes
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Sena
10 months 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
9 months ago
True, it's more of a convention than a restriction.
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Juliana
9 months ago
Yeah, I agree. It's not foolproof.
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Tanesha
9 months ago
B) No
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Alpha
9 months ago
A) Yes
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Andrew
10 months ago
I agree with Kizzy, tagging the image as 'nginx:immutable' seems like a good solution to prevent overwrite.
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Luke
10 months ago
No, I think there might be other ways to prevent image overwrite in Docker Trusted Registry.
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Kizzy
10 months ago
Yes, tagging the image as 'nginx:immutable' will prevent it from being overwritten.
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Noah
10 months 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
9 months ago
I always tag my important images as 'immutable' to avoid any accidental changes.
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Detra
9 months ago
Definitely, it adds an extra layer of security to the repository.
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Jamal
9 months ago
That's a great feature, it really helps with image management.
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Alonso
10 months ago
Yes
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