Ace Web Caching in Interviews: From HTTP Headers to In‑Memory Stores | MockRounds

Caching decisions can make or break performance—and interviewers expect you to know when, where, and how to cache.

In this short session, you'll tackle rapid-fire questions on web caching mechanisms, see instant answer reveals, and pick up brief tips you can apply in coding and system design interviews.

Quiz link: https://mockrounds.com/tech_trivias/f...

Place caches appropriately: browser/HTTP, CDN edge, application, database—closer to users first.
Pick the right strategy: cache-aside for read-heavy, write-through for correctness, write-back for throughput; combine with TTL/TTI.
Design resilient keys: include all request dimensions (user/tenant, locale, permissions); version keys on schema changes to avoid stale data.
Prevent stampedes: request coalescing, per-key locks, jittered TTL, background refresh, and backoff on misses.
Track and tune: monitor hit ratio, tail latency, origin QPS, and evictions; set SLOs and add fallbacks/circuit breakers.

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