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Java · Interview Question

Which statement about ConcurrentHashMap is correct?

Detailed answer, explanation and code for this interview question. Ideal for Java interview preparation, coding rounds and viva questions.

Difficulty: MediumType: MCQ

Question Overview

Subject

Java

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Asked in Companies

Cognizant

Problem Statement

Which statement about ConcurrentHashMap is correct?

Explanation

ConcurrentHashMap is designed for high concurrency—reads proceed without locking; writes use fine-grained locking or CAS. It disallows null keys and values to avoid ambiguity with missing mappings.

Practice Sets

This question appears in the following practice sets:

Collections & Generics (Advanced)

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Which statement about ConcurrentHashMap is correct? - Java | Preplance Interview Prep | Preplance

Master Interviews
Anywhere, Anytime

Which statement about ConcurrentHashMap is correct?

Problem Statement

Explanation

Practice Sets

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Master Interviews Anywhere, Anytime

Which statement about ConcurrentHashMap is correct?

Problem Statement

Explanation

Practice Sets

Related Questions

Why is Java considered platform independent?

Pick the correct mapping:

Which area holds per-thread call frames (locals, operand stack)?

Explain the delegation model of classloaders and why it matters for security.

What does the JIT do at runtime?

More from Java

Master Interviews
Anywhere, Anytime