github-actions

GitHub Actions uses YAML workflow files stored in the `.github/workflows` directory to define CI/CD pipelines. You specify triggers, configure jobs to check out code, install dependencies, and execute testing, building, and deployment commands.

A matrix build in GitHub Actions runs jobs across multiple operating systems, language versions, or environments simultaneously. You need it to test and build your application across various supported configurations in parallel.

Yes, GitHub Actions supports reusable workflows to modularize pipeline logic and encrypted secrets to securely authenticate automated deployment processes. These features help standardize automation and protect sensitive credentials during continuous delivery.

The best way to cache dependencies in GitHub Actions workflows is using the built-in cache action or package managers' native caching features. This prevents re-downloading dependencies on every run, significantly speeding up CI pipeline execution times.

Yes, GitHub Actions supports deployment protection rules to restrict deployments to staging or production environments. You can configure required reviewers, wait timers, and environment-specific secrets to safeguard your automated release processes.