Core Java Collections Interview Questions With Answers

📚 Core Java Collections Interview Questions With Answers | Master Collections Framework for Interviews! 🔍💼

The Java Collections Framework is one of the most frequently tested topics in interviews — and it's crucial for any serious Java developer. In this video, we go through top Java Collections interview questions along with clear, concise answers and real-world examples to help you crack your next coding interview with confidence.

📌 What you’ll learn:

Key differences between List, Set, and Map

How HashMap works internally

When to use ArrayList vs LinkedList

Thread-safe collections: What and why?

Important methods and their performance implications

Real interview-style questions and best practice answers

✅ Ideal for:

Java developers preparing for technical interviews

Students revising Java data structures

Anyone aiming to understand the Java Collections Framework deeply

📚 Topics Covered:

What is the Java Collections Framework?

Differences between Collection and Collections

HashMap vs Hashtable

Fail-fast vs fail-safe iterators

Comparable vs Comparator

How TreeMap and TreeSet maintain ordering

Common mistakes in using collections

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