Concurrency basics · interview question
Why do teams use ConcurrentHashMap over a standard HashMap in a multi-threaded environment in production code?
Multiple choiceEasychapter-15-curatedpremiumconcurrencyconcurrent-collections
Answer and explanation
Correct answer
B. It uses multiple locks to improve performance under high concurrency.
Why
ConcurrentHashMap uses 'Lock Striping', which locks only a portion of the map, allowing higher concurrency compared to a standard HashMap that can become corrupted under concurrent modifications.
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