GitHub Actions quiz

Test your GitHub Actions knowledge with a free interactive quiz — 50 questions with answers and explanations. No signup needed to play.

What is a "composite action"?

1. What is a "composite action"?
2. Which special variable contains the SHA of the commit that triggered the run?
3. How do you cache dependencies across runs to speed up workflows?
4. How do you upload build artifacts to share between jobs?
5. How do you reference an environment variable in a step?
6. Which trigger runs a workflow when code is pushed to `main`?
7. What is a "reusable workflow"?
8. What does `actions/setup-node@v4` do?
9. Which key declares the OS/runner image for a job?
10. How do you let users run a workflow manually from the GitHub UI?
11. What does a "matrix" strategy do?
12. Which timeout setting prevents runaway jobs?

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