Question

Is there a hash table of size m linked lists? What is the purpose of a hash function? Give an example....


Is there a hash table of size m linked lists? What is the purpose of a hash function? Give an example.

Answer

Given:

Hashing is a technique for distinguishing one thing from a set of similar ones.

Hashing is a typical method for creating hash tables.

A hash table is a list that maintains key/value pairs and allows you to retrieve any entry by its index.

Clarification:

In a hash table of size m, how many linked lists are there?

A linked list was needed for each hash table entry.

We must use a special linked list to store the entries in the hash table.

If there is a collision, which implies two separate entries have the same hash value, both elements should be stored in the same linked list.

As a result, with a hash table of size m, m linked lists are necessary.

What is the purpose of a hash function? Make an example.

For data integrity and to combine with digital signatures, hash functions are utilised.

The digital signature is transformed by the hash function, and then the hash value and signature are given to the recipient.

The hash value generated by the receiver was compared to that received with the message using the same hash function.

If the hash values are the same, the message was most likely sent without issues.

Folding is an example of a hash function.

This method takes an initial number and splits it into many pieces, then adds the parts together and utilises the final four digits as the hashed value or key.

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