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Implement LRUCache with O(1) Operations and Thread Safety

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MediumData ScientistOnsiteCoding & Algorithms

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This question evaluates a candidate's ability to implement a constant-time LRU cache and reason about thread-safety and concurrent access, testing data structure design and concurrency competencies in the Coding & Algorithms domain.

Scenario

High-traffic API needs constant-time eviction cache.

Question

Implement an LRUCache supporting get(key) and put(key,val) in O( 1). Describe thread-safety considerations for concurrent access.

Hints

Combine hash map with doubly-linked list; lock striping or concurrent linked hash map for threads.