Java Threading · interview question
How does a ConcurrentHashMap handle concurrent updates to ensure thread safety?
Multiple choiceHardchapter-15-curatedpremiumjava-threadingrace-conditions
Answer and explanation
Correct answer
B. It locks segments of the map rather than the entire map.
Why
ConcurrentHashMap uses a segmented locking strategy, where updates can lock only a segment of the map, allowing greater concurrency and better performance compared to locking the entire map.
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