Node.js is a very powerful JavaScript-based framework/platform built on Google Chrome's JavaScript V8 Engine.It is used to developweb and mobile applications.. Node.js is open source, completely free, and used by thousands of developers around the world. Node was built with JavaScript so it helps if you have some understanding of how JavaScript actually works.Also having some understanding of other web technologies such as HTML, CSS, AJAX is useful.

Nodes uses an event-driven, non-blocking I/O model that makes it lightweight and efficient—perfect for data-intensive real-time applications that run across distributed devices. Nodes is a platform built on the Chrome JavaScript run time that can help you build fast, Scalable network applications.

Node is quite popular and used by some big companies like eBay, General Electric, GoDaddy, Microsoft, PayPal, Uber, and Yahoo! just to name a few. By the end of this course you will have some basic understanding of Node.js. build applications.

We will be building a real-time chat application that you can use to communicate with your friends and family using node ,express ,socketio and mongodb. Also we will build a REST APi from scratch using Node and Express. REST stands for Representational State Transfer and defines a set of standards for web services. It is an architectural style as well as an approach for communications purposes that is often used in various web services development.

An API is an interface that different software programs use to communicate with each other.

RESTful API is an API that conforms to the REST architectural style and constraints. REST systems are stateless, salable,cacheable, and have a uniform interface.