Cheat Sheet
| Question | Core Idea | Senior Signal |
|---|---|---|
| Q016-Q020 | Network behavior | Freshness, cancellation, offline behavior, and transport choice matter more than API trivia. |
| Q021-Q025 | Observability | Measure field signals, long tasks, bundle cost, and retained references. |
| Q026-Q027 | Security | Explain layered controls and what each control cannot protect. |