Category: Node JS Interview Question and Answer

Difference between JavaScript and Node.js The following table specifies the crucial differences between JavaScript and Node.js: Comparison features JavaScript Node.js Type JavaScript is a programming language. More precisely, you can say that it is a scripting language used for writing scripts on the website. Node.js is an interpreter and run time environment for JavaScript. Utility…

When functions are treated like any other variable, then those functions are called first-class functions. Apart from JavaScript, many other programming languages, such as Scala, Haskell, etc. follow this pattern. The first class functions can be passed as a param to another function (callback), or a function can return another function (higher-order function). Some examples…

There are two types of API functions in Node.js:

The term I/O stands for input and output. It is used to access anything outside of your application. The I/O describes any program, operation, or device that transfers data to or from a medium or another medium. This medium can be a physical device, network, or files within a system. I/O is loaded into the…

A web application distinguishes into 4 layers:

Following are the main advantages of Node.js:

These are the following purposes of Node.js:

Yes. Node is a single-threaded application with event looping.

Yes. It is released under MIT license and is free to use.

Node.js is Server-side scripting which is used to build scalable programs. It is a web application framework built on Google Chrome’s JavaScript Engine. It runs within the Node.js runtime on Mac OS, Windows, and Linux with no changes. This runtime facilitates you to execute a JavaScript code on any machine outside a browser.