Top 50 thread safety Interview Questions
The most frequently asked thread safety questions across all roles and companies, ranked by real interview frequency. Updated daily.
Implement a thread-safe LRU cache using constant-time lookups, updates, eviction, and synchronization.
Citadel
Bain &
GoogleImplement a thread-safe LRU cache for LLM responses with canonical request keys, TTL expiration, and bounded capacity.
Stellantis
Samsung SemiconductorIIntuitionLabs.aiImplement thread-safe random and round-robin routing with dynamic server membership and deterministic unit-test simulation.
RevolutImplement a thread-safe singleton using a lock and verify that concurrent callers receive the same instance.
NiCEImplement a bounded FIFO queue using condition variables so concurrent producers and consumers coordinate safely.
KPMG
Pure StorageImplement a locked Min Stack with O(1) push, pop, top, and minimum retrieval.
SupermicroImplement a thread-safe singleton for a Waymo hardware driver while preserving the first initialization configuration.
WaymoImplement a linearizable handler for batched shared-state updates using locking.
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