Answer :
Explanation :

Node.js is a framework for web applications built on Google Chrome's JavaScript Engine(V8 Engine). Node.js is comes with runtime environment on which a cript based on javascript can be interpreted and executed (It is analogus to JVM to JAVA byte code). This runtime environment allows to execute a JavaScript code on any machine outside a browser. Because of this runtime of Node.js, JavaScript is now can be executed on server also. Node.js is provides a rich library of various javascript modules which eases the developement of web application using Node.js to greater extents.