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Java · Interview Question

Contrast TreeMap and HashMap in terms of ordering, performance, and key requirements.

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

Difficulty: MediumType: Subjective

Question Overview

Subject

Java

Asked in Companies

Problem Statement

Contrast TreeMap and HashMap in terms of ordering, performance, and key requirements.

Explanation

TreeMap is sorted (log N ops, Comparable/Comparator needed); HashMap is unsorted (avg O(1) ops) and only needs equals/hashCode.

Practice Sets

This question appears in the following practice sets:

Strings & Core Collections Essentials

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Contrast TreeMap and HashMap in terms of ordering, performance, and key requirements. - Java | Preplance Interview Prep | Preplance

Master Interviews
Anywhere, Anytime

Contrast TreeMap and HashMap in terms of ordering, performance, and key requirements.

Problem Statement

Explanation

Practice Sets

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Master Interviews Anywhere, Anytime

Contrast TreeMap and HashMap in terms of ordering, performance, and key requirements.

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