GitHub Professional Certificate GitHub Packages and Container Registry 2

Question 1

In a GitHub Actions workflow, which built-in secret should be used to authenticate with GitHub Packages?

Accepted Answer

secrets.GITHUB_TOKEN

Answer

The automatically provided secrets.GITHUB_TOKEN has the necessary permissions to read and write packages within the same repository's workflow.

Question 2

What GitHub Actions step snippet correctly authenticates Docker with GHCR using the built-in token?

Accepted Answer

uses: docker/login-action@v3 with registry: ghcr.io, username: ${{ github.actor }}, password: ${{ secrets.GITHUB_TOKEN }}

Answer

The docker/login-action with registry ghcr.io, github.actor as username, and GITHUB_TOKEN as password is the standard approach for GHCR authentication in Actions.

Question 3

How can you link a container image published to GHCR to a specific GitHub repository?

Accepted Answer

By adding an org.opencontainers.image.source label in the Dockerfile pointing to the repository URL

Answer

Adding the OCI label org.opencontainers.image.source with the repository URL in the Dockerfile automatically links the container to that repository on GitHub.

Question 4

Which GitHub permission level is required for a user to delete a package version from GitHub Packages?

Accepted Answer

Admin access to the repository or organization

Answer

Deleting package versions requires admin access to the repository or organization that owns the package.

Question 5

What is the key difference between GitHub Packages (docker.pkg.github.com) and GitHub Container Registry (ghcr.io)?

Accepted Answer

GHCR is independent of repository permissions and supports granular access control; the older registry ties packages to repository access

Answer

GHCR (ghcr.io) has independent access controls from repositories and supports organization-level visibility, while the legacy docker.pkg.github.com registry was tied to repository permissions.

GitHub Professional Certificate Practice Test

GitHub Professional Certificate Practice Test

GitHub Professional Certificate GitHub Packages and Container Registry 2