Hash Tables

A hash table is a data structure that implements an associative array in which the data is stored by mapping the keys to the values as key-value pairs. In many applications, we mostly require different operations such as insert, search, and delete in a dictionary data structure. For example, a symbol table is a data structure based on a hash table that is used by the compiler. A compiler that translates a programming language maintains a symbol table in which keys are character strings that are mapped to the identifiers. In such situations, a hash table is an effective data structure since we can directly compute the index of the required record by applying a hash function to the key. So, instead of using the key as an array index directly, the array index is computed by applying the hash function to the key. It makes it very fast to access an element from any index from the hash table. The hash table uses the hashing function to compute the index of where the data item...