Concurrency basics · interview question
How does ConcurrentHashMap improve performance over Collections.synchronizedMap in a high-concurrency setting?
Multiple choiceMediumchapter-15-curatedpremiumconcurrencyconcurrent-collections
Answer and explanation
Correct answer
C. By utilizing lock striping or node-level locking.
Why
ConcurrentHashMap uses lock striping, which means it locks only a portion of the map for updates, unlike Collections.synchronizedMap which locks the entire map.
Test yourself on Concurrency basics
A free test with instant, explained results. No account needed.
More Concurrency basics questions
- How can you ensure that a CompletableFuture runs on a specific Executor?
- Which situation benefits most from using AtomicInteger over synchronized blocks?
- Which CompletableFuture method should be used to execute a task asynchronously in a non-blocking manner?
- In which scenario would you use.thenCompose() over.thenApply() in CompletableFuture?
- Which CompletableFuture method should be used to handle both results and exceptions in a unified way?
- How does AtomicInteger's getAndIncrement method differ from incrementAndGet?