6. Improve Developer Productivity with GitHub Copilot (10-15%)

This phase is where everything becomes practical: the concrete tasks Copilot accelerates day to day. The exam frames these as use cases — generation, refactoring, documentation, learning, testing, security — and asks you to recognize where Copilot helps and, just as often, where the responsible-use cautions from Phase 3 still apply. The throughline: Copilot's biggest productivity wins come not from typing speed but from removing friction — context switches, boilerplate, the blank page — while you stay the validating authority.