**What Is Data Structure and Types of Data Structure?**

Data structure is a way of organizing and storing data in a computer system. It provides a systematic way to manage and manipulate data efficiently.

In simple terms, it is the arrangement of data in a logical manner that allows for easy access, modification, and retrieval. Various types of data structures are used depending on the specific requirements and constraints of different applications.

__Types of Data Structures:__

## 1. Arrays

An array is a fixed-size collection of elements of the same type.

It provides random access to its elements using an index. Arrays are widely used due to their simplicity and efficiency in accessing elements based on their positions.

## 2. Linked Lists

A linked list is a dynamic data structure that consists of nodes connected together via pointers or references.

Each node contains data and a reference to the next node in the sequence. Linked lists allow for efficient insertion and deletion operations at any position but have slower access times compared to arrays.

## 3. Stacks

A stack is an abstract data type that follows the Last-In-First-Out (LIFO) principle.

It can be implemented using arrays or linked lists. Elements can only be inserted or removed from the top, known as the “top” of the stack.

## 4. Queues

A queue is an abstract data type that follows the First-In-First-Out (FIFO) principle.

It can also be implemented using arrays or linked lists. Elements are inserted at one end called the “rear” and removed from the other end called the “front. “

## 5. Trees

Trees are hierarchical data structures consisting of nodes connected by edges.

Each node can have zero or more child nodes, except for the root node which has no parent. Trees are widely used in various applications, such as representing hierarchical relationships and organizing data efficiently.

## 6. Graphs

A graph is a collection of nodes connected by edges.

It can be either directed or undirected. Graphs are used to represent complex relationships between objects, such as social networks, web pages, and transportation networks.

## 7. Hash Tables

A hash table is a data structure that uses a hash function to map keys to array indices, allowing for efficient retrieval and storage of data items. It provides constant-time average case complexity for insertion, deletion, and search operations.

These are just some of the commonly used data structures in computer science and programming. Understanding their characteristics and choosing the appropriate data structure is essential for designing efficient algorithms and solving complex problems.

Remember to consider the requirements of your specific application before selecting a data structure, as each type has its own advantages and limitations.