Introduction to Hash Tables | What is a HashTable in Algorithm

Hash tables provide fast insertion and search times irrespective of data size by storing elements in an array using a hash function to generate an index. Collisions can occur when different elements hash to the same index. Collision resolution techniques include chaining, linear probing, and quadratic probing. Chaining uses linked lists at each index to store elements, while linear and quadratic probing search for the next empty index using arithmetic sequences. These techniques improve upon search time compared to binary search.