It consists of four languages, namely:
MongoDB is an open-source, cross-platform database written in C++. It is a document-oriented NoSQL Database. With MongoDB, you can manage large-sized tables with millions of data, its an ideal choice for a database management system.
ExpressJS is a flexible, lightweight server framework. Designed to build single, multi-page & hybrid web applications.
AngularJS an open-source Javascript framework. AngularJs introduces MVC architecture in the browser-based application making the development & testing process easier.
Node.js is an open-source, cross-platform Javascript runtime to build server-side & networking applications. It uses a non-blocking, event-driven I/O model, making it lightweight, efficient, hence, NodeJS provides data-intensive real-time applications that runs across various devices.