What is the purpose of a hash function in a hash table?

Practice Questions

Q1
What is the purpose of a hash function in a hash table?
  1. To sort the data
  2. To encrypt the data
  3. To map keys to indices
  4. To store data in a binary tree

Questions & Step-by-Step Solutions

What is the purpose of a hash function in a hash table?
  • Step 1: Understand what a hash table is. A hash table is a data structure that stores data in a way that allows for quick access.
  • Step 2: Know that each piece of data in a hash table is associated with a key. This key is like a label for the data.
  • Step 3: Learn about the hash function. A hash function is a special formula that takes the key and turns it into a number.
  • Step 4: This number is called an index, and it tells us where to find the data in the hash table.
  • Step 5: The purpose of the hash function is to make it easy and fast to find the data using the key.
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