Collisions in Hash Tables
Explore how collisions occur in hash tables when multiple keys map to the same index and understand common techniques like linear probing, chaining, and resizing. This lesson helps you grasp practical methods to manage collisions efficiently, enabling you to implement robust hash tables in C++ for coding interviews.
We'll cover the following...
We'll cover the following...
When you map large keys into a small range of numbers from 0-N, where N is the size of the array, there is a huge possibility that two different keys may return the same index. This phenomenon is called a collision.
Strategies to Handle Collisions #
There are several ways to work around collisions in the array. The three most common strategies are:
- Linear Probing
- Chaining
- Resizing the array