Top 25 Java Collections Interview Questions for Wipro and Capgemini — With Answers (2025)

Wipro and Capgemini interviews often follow a pattern: after basic Java questions they go deep into Collections — how they work, when to use which one, and why. This post collects the 25 most-asked Collections questions with short, clear answers and code examples. Read this the night before your interview and you’ll walk in confident. Table of Contents 1. What is the Java Collections Framework? 2. What is the difference between Collection and Collections? 3. What is the difference b