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Microsoft GH-200 Exam - Topic 2 Question 17 Discussion

As a developer, how can you identify a Docker container action on GitHub?
D) The action.yml metadata file has the runs.using value set to Docker.
A) The action's repository includes @actions/core in the root directory.
B) The action's repository name includes the keyword 'Docker.'
C) The action.yml metadata file references a Dockerfile file.

Microsoft GH-200 Exam - Topic 2 Question 17 Discussion

Actual exam question for Microsoft's GH-200 exam
Question #: 17
Topic #: 2
[All GH-200 Questions]

As a developer, how can you identify a Docker container action on GitHub?

Show Suggested Answer Hide Answer
Suggested Answer: D

In a Docker container action, the action.yml file includes the runs.using field, which is set to docker to specify that the action runs inside a Docker container. This is the key indicator that the action is a Docker container action.


by Ranee at Jun 22, 2026, 04:21 PM

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Elin
23 days ago
I'm leaning towards A. The presence of @actions/core is a strong indicator for me.
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Loreta
29 days ago
I agree, but option C also makes sense. If there's a Dockerfile, it's likely a Docker action.
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Jamal
1 month ago
I think option D is the best choice. It clearly states the usage of Docker.
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Novella
1 month ago
Totally agree with D, it's clear and concise!
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Kara
1 month ago
Wait, can you really tell just by the repo name? Sounds off.
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Lenny
2 months ago
A doesn't really mean it's a Docker action though.
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Billi
2 months ago
I think D is the most straightforward way to tell.
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Alesia
2 months ago
C is definitely a key indicator!
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Hayley
2 months ago
I remember discussing how the action.yml file is crucial, so option D might be the best choice since it directly mentions Docker.
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Markus
2 months ago
I practiced a question like this before, and I think option A is a bit misleading. Just because it has @actions/core doesn't mean it's a Docker action.
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Shantay
3 months ago
I'm not entirely sure, but I feel like option C could be correct since it mentions the action.yml and Dockerfile together.
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Launa
3 months ago
I think option D sounds familiar because I remember something about the runs.using value indicating the environment.
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