What is the time complexity of hash map operations?

What is the time complexity of hash map operations?

The average time complexity for operations like insert, delete, and search in a hash map 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 hash map?

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

Can you explain what a load factor is?

The load factor is the ratio of the number of elements in the hash map to the number of buckets. A higher load factor can lead to more collisions.

How can I reduce collisions in a hash map?

You can reduce collisions by using a better hash function, increasing the number of buckets, or using techniques like chaining or open addressing.

What is the difference between chaining and open addressing?

Chaining uses linked lists to store multiple elements at the same index, while open addressing finds another open slot within the array itself.