200-901 Application Deployment and Security Practice Question
A CI/CD pipeline using GitHub Actions needs to build a Docker image and push it to Docker Hub. Which event trigger should be used to run the workflow only when code is pushed to the main branch?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
on: push: branches: [ main ]
The 'push' event with branch filter triggers on pushes to main. 'pull_request' triggers on PRs, 'release' on releases, 'workflow_dispatch' manual trigger.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
on: workflow_dispatch
Why it's wrong here
Manual trigger only.
- ✓
on: push: branches: [ main ]
Why this is correct
Correct syntax to trigger on push to main branch.
- ✗
on: release: types: [ published ]
Why it's wrong here
Triggers on release publication.
- ✗
on: pull_request: branches: [ main ]
Why it's wrong here
Triggers on pull requests, not pushes.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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