ArrayList vs LinkedList in Java Explained (Technical Interview Prep)
What is the difference between an ArrayList and a LinkedList? It is one of the most common data structure questions asked in technical interviews. In this 5-minute animated tutorial, we visually break down how memory allocation works, time complexity (Big-O) for insertions and lookups, and exactly how to implement a LinkedList in Java from scratch.
📌 Topics Covered:
0:00 - ArrayLists vs LinkedLists
0:30 - Anatomy of a Node
1:10 - Head, Tail, and Null Pointers
1:50 - Traversal & Search (O(N) Time)
2:35 - The Superpower: Insertion (O(1) Time)
3:20 - Writing the Node Class in Java
3:55 - Writing the LinkedList While Loop
4:35 - Interview Cheat Sheet Summary
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