MEAN STACK

MEAN is a collection of JavaScript-based technologies — MongoDB, Express.js, AngularJS, and Node.js — used to develop web applications. From the client and server sides to databases, MEAN is a full-stack development toolkit. Play through the following five courses to become a MEAN stack developer and earn a new badge!

MongoDB provides high availability with replica sets. A replica set consists of two or more copies of the data. Each replica set member may act in the role of primary or secondary replica at any time. All writes and reads are done on the primary replica by default. Secondary replicas maintain a copy of the data of the primary using built-in replication. When a primary replica fails, the replica set automatically conducts an election process to determine which secondary should become the primary. Secondaries can optionally serve read operations, but that data is only eventually consistent by default.

Express JS is a JavaScript web application framework to build dynamic websites with efficient features. Express JS and NodeJS both are used as a server-side framework to deliver unmatched performance in web applications. Express Js is use to create web applications easily. It provides a slightly simpler interface for creating request endpoints, handling cookies, forming the response and handling routes.

AngularJS is referred to as a client-side framework and is used in front-end web development with high efficiency and potentially to develop high-end web applications.AngularJS, a client-side framework. MongoDB stores data in a JSON-like format and AngularJS allows the client to seamlessly send and receive JSON documents.

Node JS is an open-source and cross-platform web development framework is used to build scalable web applications. It supports rich JavaScript modules and libraries.Node.js and Express is used to create a RESTful API server. To connect MongoDB and the app server the Node.js driver is been used.

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