What is the time complexity of hashmap operations?

What is the time complexity of hashmap operations?

The average time complexity for operations like insert, delete, and search in a hashmap is O(1). However, in the worst case, it can be O(n) if many elements hash to the same index.

What factors affect the performance of a hashmap?

Factors include the quality of the hash function, load factor, and how collisions are handled. A good hash function minimizes collisions.

Can you explain what a collision is?

A collision occurs when two different keys hash to the same index in the hashmap. This can lead to performance degradation if not handled properly.

How can collisions be resolved in a hashmap?

Collisions can be resolved using methods like chaining, where each index points to a list of entries, or open addressing, where we find another open slot.