The complete GitHub Actions study library — 9 lessons mapped to every domain and topic in the official exam guide. Free to read, no account needed.
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GitHub publishes exactly what the GH-200 tests and how much each part is worth. Here it is — every domain, its weight, the topics inside it, and the lessons that cover them.
Triggers and events, workflow structure (jobs, steps, conditions, matrices, service containers, contexts and expressions, YAML anchors), and execution outputs: caching, artifacts, job summaries and badges. Official weight range 20–25%.
Reading what a workflow did and why it failed: triggers, logs and run history, matrix expansions and reruns, artifacts via UI and API, and starter vs reusable workflows vs composite actions. Official weight range 15–20%.
JavaScript, Docker and composite actions: metadata and directory structure, workflow commands, troubleshooting, immutable actions and version pinning, and publishing to the Marketplace. Official weight range 15–20%.
Actions at organization and enterprise scale: governance policies and reusable components, GitHub-hosted and self-hosted runners and runner groups, networking, and secrets and variables at every scope. Official weight range 20–25%.
Hardening and tuning automation: environment protections, script-injection defences, GITHUB_TOKEN permissions vs PATs, OIDC federation, SHA pinning, action allow lists, artifact attestations, and caching and retention for cost. Official weight range 10–15%.
Reading every note front to back is the slowest way to pass. The exam is weighted, so your revision should be too — the blueprint above tells you exactly where the marks are.
Author and manage workflows carries the most marks on the GH-200, so it earns the most of your attention. Work down the blueprint from the heaviest domain to the lightest rather than starting at domain 1 and grinding forward.
Read each lesson once without stopping to memorise — you are building a map, not a memory. On the second pass, read only the "what's tested" and key-takeaway blocks. If a takeaway surprises you, that lesson goes back on the pile.
Cover a lesson's key takeaways and try to say them out loud from the heading alone. Recall you can produce under your own steam is the only recall that survives a timed exam; recognition on a re-read is not the same thing.
Finishing the notes is not the goal — scoring is. Move to GH-200 practice questions early, then come back to the exact lessons your wrong answers point at. That loop is worth far more than a third read-through.
Exam structure, domain weights and scoring on this page come from the official GH-200 exam guide.