Tracks / React
React
Reconciliation, hooks, context cost, concurrent rendering, RSC.
junior
Screening questions. Expected to be automatic.
- Core React & hooks11 questions
Rendering, state, effects, keys, controlled inputs — the questions in every React screen.
senior
Trade-offs and failure modes under follow-up pressure.
- Advanced patterns, performance & React 1910 questions
Context cost, reconciliation internals, Suspense, concurrent features, Server Components, and profiling.
- Frontend forensics Signal6 questions
Six frontend symptoms — a render storm, a hydration mismatch only in production, an LCP that is fine in the lab and terrible in the field.