Top 50 cache Interview Questions

Implement an O(1) LRU cache using a hash map and doubly linked list.

Hash TablesLinked ListscachingAnnapurna Labs (U.S.)CCouchbaseAlphaSense

Implement an LRU cache with O(1) get and put using a hash table and doubly linked list.

Hash TablesLinked ListscacheNTT DATAUnity Technologies

Implement an LFU cache with LRU tie-breaking and O(1) get and put operations.

cachingData StructurescacheKKhataBookMetaRippling

Build an LRU cache that reuses exact or semantically similar LLM responses while enforcing TTL and relevance thresholds.

deduplicationcachingcacheMMiracle-EarCCYOS SolutionsFactset

Implement a thread-safe LRU cache using constant-time lookups, updates, eviction, and synchronization.

thread safetycachingData StructuresCitadelBain &Google

Implement a thread-safe LRU cache for Arrowstreet Capital model results with O(1) reads, writes, and evictions.

model inferencecacheArrowstreet CapitalRevolutTikTok Shop