Java Interview Questions · interview question

In Java, which comparison about ConcurrentHashMap and Concurrent Collections is accurate?

Multiple choiceEasyjava-interview-2026interviewjavacomparison

The oldest option related to ConcurrentHashMap and Concurrent Collections is always the right production choice regardless of context.Differences around ConcurrentHashMap and Concurrent Collections are mostly cosmetic, so correctness and maintainability do not change.It usually scales better than wrapping a plain HashMap with one synchronized lock around every access.There is no practical difference in behavior, performance, or API design when ConcurrentHashMap and Concurrent Collections is involved.

Answer and explanation

Correct answer

C. It usually scales better than wrapping a plain HashMap with one synchronized lock around every access.

Why

It usually scales better than wrapping a plain HashMap with one synchronized lock around every access. This is the comparison that usually separates memorization from understanding.

Test yourself on Java Interview Questions

A free test with instant, explained results. No account needed.

Start free test

All Java Interview Questions questions →

In Java, which comparison about ConcurrentHashMap and Concurrent Collections is accurate?

Correct answer

Why

More Java Interview Questions questions