Redis Interview Questions & Assessment
Assess Redis skills including data structures, caching patterns, pub/sub, Lua scripting, and cluster configuration.
Why Redis Matters
Redis is the most popular in-memory data store, used as a cache, message broker, and session store by Twitter, GitHub, and Stack Overflow. Understanding Redis is essential for building performant applications.
Sample Interview Questions
What data structures does Redis support? Give a use case for each.
Explain cache invalidation strategies. How do you handle cache stampede?
How would you implement a rate limiter using Redis? Compare different approaches.
Explain Redis persistence: RDB vs AOF. When would you use each?
How does Redis Cluster work? Explain hash slots and resharding.
How to Prepare
Know all data structures: strings, lists, sets, sorted sets, hashes, streams
Understand caching patterns: cache-aside, write-through, write-behind
Practice with Redis transactions (MULTI/EXEC) and Lua scripting
Know eviction policies: LRU, LFU, volatile-ttl, allkeys-random
Understand Redis Sentinel vs Redis Cluster for high availability
Related Skills
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