TCS Hashing Questions Quiz-1

In a hash table, there are fewer array positions than the keys, so the position of the key in the array is computed using the hash function.

Making the hash function random is not really a good choice, although it is considered one of the techniques to avoid collisions along with chaining and simple uniform hashing.

Direct addressing is possible only when we can afford to allocate an array that has one position for every possible key.

A hash table is used to implement associative arrays which has a key-value pair, so the hash table maps keys to values.

By definition

Making the hash function random is not really a good choice, although it is considered one of the techniques to avoid collisions along with chaining and simple uniform hashing. Chaining is the best

Since every key has a unique array position, searching takes a constant time

When more than one element are competing for the same bucket in the hash table, this condition is known as the Collision.

In simple uniform hashing, any given element is equally likely to hash into any of the slots available in the array.

In simple chaining, the load factor is the average number of elements stored in a chain and is given by the ratio of a number of elements stored to the number of slots in the array.