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What is REST API? Complete Guide for Beginners (2026)

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REST API is one of the most important concepts in backend and full stack development. If you want to become a Backend Developer, Full Stack Developer, Java Developer, or MERN Stack Developer, you must understand what REST API is and how it works.

In this guide, you will learn What is REST API, how it works, why it is used, and how to learn API development. We will also explain where students in Jaipur can learn backend and full stack development at Groot Academy.

This article is useful for students searching for:
REST API Tutorial, Backend Course in Jaipur, Full Stack Course Jaipur, Java Course Jaipur, Coding Classes Jaipur, Best IT Institute Jaipur.


What is REST API?

REST API means:

REST = Representational State Transfer
API = Application Programming Interface

REST API allows frontend and backend to communicate.

Example:

  • Frontend → sends request
  • Backend → sends data
  • Database → stores data

REST API is used in:

  • Websites
  • Mobile apps
  • Software
  • Cloud apps

Every modern application uses API.


Example of REST API

Example:

Login system

  1. User enters data
  2. Frontend sends request
  3. Backend checks data
  4. Database returns result
  5. API sends response

Without API, frontend cannot talk to backend.


HTTP Methods in REST API

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Common methods:

GET → get data
POST → send data
PUT → update
DELETE → remove

These are used in every backend project.


Languages Used for REST API

You can create API using:

  • Java + Spring Boot
  • Node JS + Express
  • Python + Django
  • PHP + Laravel
  • .NET

Database:

  • MySQL
  • MongoDB
  • SQL Server

API is part of full stack.


Why REST API is Important

REST API is required for:

  • Full stack development
  • Mobile apps
  • Backend jobs
  • Cloud apps
  • Microservices

Without API you cannot become backend developer.


How to Learn REST API

Step by step:

  1. Learn programming
  2. Learn backend
  3. Learn database
  4. Learn HTTP
  5. Learn Spring / Node
  6. Build API project

Projects required.


Best Backend / Full Stack Course in Jaipur

Groot Academy Jaipur

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Groot Academy is a software training institute in Jaipur providing job-oriented backend and full stack training.

Courses available:

  • Backend Development
  • REST API Development
  • Java Full Stack
  • Spring Boot
  • MERN Stack
  • Python Full Stack
  • .NET Full Stack
  • Internship Training

Why choose Groot Academy

  • Live project training
  • Internship certificate
  • Placement support
  • Industry mentors
  • Beginner friendly
  • Software company environment

Website
https://grootacademy.com

Software Company
https://grootsoftware.com

Social Media

LinkedIn
https://www.linkedin.com/company/grootacademy/?originalSubdomain=in

Instagram
https://www.instagram.com/groot.academy/

Facebook
https://www.facebook.com/GrootAcademy

Contact
+91-9610967825

Location
Jaipur Rajasthan


Final Conclusion

REST API is required for backend and full stack development. You should learn programming, database, and frameworks to build API. API knowledge is required in every software job.

If you are searching for Backend Course in Jaipur, you can join Groot Academy Jaipur, where students learn real software development with live projects and internship.


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