Exam GH-200 Topic 1 Question 33 Discussion

Actual exam question for Microsoft's GH-200 exam
Question #: 33
Topic #: 1
As a developer, you are using a Docker container action in your workflow. What is required for the action to run successfully?

Suggested Answer: D Vote an answer

To run a Docker container action, the job's runs-on environment must be a Linux machine that has Docker installed.
Key Requirements
Linux OS Only: Docker container actions are only supported on Linux runners. They cannot run on Windows or macOS runners.
Docker Installed: The runner must have the Docker CLI and daemon installed and running to build and execute the action's container.
GitHub-Hosted Runners: If you use GitHub-hosted runners, you must specify an Ubuntu environment (e.g., runs-on: ubuntu-latest), as these come pre-configured with Docker.
Self-Hosted Runners: For self-hosted runners, you must manually ensure the machine is running Linux and has Docker installed.
Reference:
https://docs.github.com/actions/sharing-automations/creating-actions/creating-a-docker- container-action

by Judith at Jun 28, 2026, 02:04 AM

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