What is a Hash Collision?
A hash collision occurs when two different keys map to the same index in a hash table. This can happen even with a good hash function, especially if the hash table is full or the keys are similar.
Causes of Hash Collisions:
- Poor Hash Function: A hash function that does not distribute keys evenly across the hash table can lead to more collisions.
- High Load Factor: A high load factor (ratio of keys to hash table size) increases the probability of collisions.
- Similar Keys: Keys that are similar in value or structure are more likely to collide.
Hashing in Data Structure
Hashing is a fundamental data structure that efficiently stores and retrieves data in a way that allows for quick access. It involves mapping data to a specific index in a hash table using a hash function that enables fast retrieval of information based on its key. This method is commonly used in databases, caching systems, and various programming applications to optimize search and retrieval operations.
Table of Content
- What is Hashing in Data Structure?
- Hash Table in Data Structure
- Hash Function
- What is a Hash Collision?
- Collision Resolution Techniques
- Applications of Hashing
- Basics of Hashing in Data Structure
- Easy Problem on Hashing
- Medium Problem on Hashing
- Hard Problem on Hashing