**Introduction to Data Structures:-**

Data structure is a fundamental concept of any programming language, essential for algorithmic design. It is a method of arranging data in a computer so that it can be efficiently used. The goal is to simplify the space and time requirements of various tasks. It is how data and the relationship amongst different data is represented.

**There are two types of data structures:-**

Linear:- It is one in which elements of the data structure are arranged in a sequential or a linear fashion. Examples - Arrays, Linked Lists, Stacks, and Queues.

Non-linear:- In these data structures, elements are arranged in such a way that the traversal of nodes is not done in a sequential manner. Examples - Trees, Graphs, and Hash Tables.

**Applications of Data Structures :-**

Since we need to store our data in an organized, particular format, as per the requirement, data structures can come in handy. Some of the most important areas where data structures are used are as follows:

Artificial intelligence

Machine learning

Database design and management

Compiler design

Numerical and Statistical analysis

Blockchain

Operating system development

Image & Speech Processing

Cryptography

In compiler implementation, identifiers look up are built using hash tables

For making retrieval of data fast in database management systems, B-trees data structures are used.

**Some Commonly Used Data Structures:-**

In this section, we will learn about some commonly used data structures.

Arrays

Linked List

Stacks and Queues

Hashtables

Graphs

Trees

Heaps and Maps

Data Structure Interview Questions