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Practice Mode · SYS-DESIGN

0:55:30

You are designing a URL shortener that must handle 10,000 redirects per second with sub-10ms latency. Which caching strategy is most effective?

AWrite-through cache with Redis

BCache-aside (lazy loading) with Redis

CWrite-behind cache with Memcached

DRead-through cache with a CDN layer

ExplanationCorrect ✓

Cache-aside , avoiding cache pollution. Redis TTL-based eviction keeps hot short-codes in memory with minimal latency.loads data into cache only on demand, avoiding cache pollution. Redis TTL-based eviction keeps hot short-codes in memory with minimal latency.

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