Collision resolution Techniques

Collision resolution

Collision resolution refers to the techniques used to handle collisions that occur when two or more keys produce the same hash value in a hash table. One common method of collision resolution is separate chaining, which involves using a data structure, such as a linked list or an array, to store multiple elements that collide at the same hash index.

When a collision occurs, collision resolution techniques are employed to determine how to store and retrieve the colliding keys and their associated values. There are various collision resolution strategies, including:


Separate Chaining: This technique involves using a data structure, such as a linked list or an array, to store multiple elements that collide at the same hash index. Each bucket in the hash table contains the head of a linked list or an array that holds all the elements with the same hash value.

Open Addressing: In open addressing, all elements are stored in the hash table itself, typically in an array. When a collision occurs, the probing sequence is followed to find the next available slot in the table. The probing sequence determines how subsequent indices are checked until an empty slot is found.