← I Shipped a Fix. My Service Worker Kept Serving the Bug.Quiz
Service workers, cache strategies, and stale deploys
Eight questions on why a cache-first service worker can keep serving an old bug after a fix ships, and the lifecycle + cache-eviction knobs that actually fix it.
questions8
pass mark70%
resultsat the end
No account needed. Answer all 8 questions, then see your score with every answer explained and a reference to the spec or MDN — pass and you can claim a certificate.