Node Js Interview Questions And Answers

Setup a Node.js Development Environment on Windows, Mac and Linux –
It is easy to install Node.js on Mac, Windows and Linux. Simply you can go to Node.js official site and download you installer (Mac, Windows and Linux), and then execute the installer as per you and after that your window installer you received a text messages looks like, “Congrats!! You successfully installed Node.js on Windows!!”

Node.js Installer Following Steps,

1. Download the Windows installer from Nodejs.org official site.
2. Click and Run the installer (.msi installer package).
3. Follow the prompts instructions of the installer (Accept the agreement and click the NEXT button)
4. Restart your computer to get everything working in your command line interface (CLI).

Download Installer,

Download Node.js built installer and source code as for you, for Window, Mac and Linux with NPM and after that you can start developing applications.
The NPM is located in the directory where the Node.js is installed.

Update to Node.js, simply goes to Node.js official site and downloads Windows, Mac and Linux installer, and then executes the installer. Now your latest version of Node.js is updated on your machine.

For the latest stable version:
sudo n stable

For the latest version:
sudo n latest

Local Modules –
The Local modules are created locally by the user or dedicated software developer. All such modules may have several functionalities grouped into different files and folders. And all these can be distributed in the Nodejs community with the help of Node Package Manager.

Third-party modules or External Modules –
The third-party modules by downloading them through Node Package Manager.

[php]

{
“name”: “npm-demo”,
“version”: “0.1.0”,
“private”: true,
“dependencies”: {
“axios”: “^0.19.0”,
“bootstrap”: “^4.3.1”,
“jquery”: “^3.4.1”,
“popper.js”: “^1.16.0”,
“react”: “^16.12.0”,
“react-bootstrap”: “^1.0.0-beta.15”,
“react-dom”: “^16.12.0”,
“react-router-dom”: “^5.1.2”,
“react-scripts”: “3.2.0”
},
“scripts”: {
“start”: “react-scripts start”,
“build”: “react-scripts build”,
“test”: “react-scripts test”,
“eject”: “react-scripts eject”
},
“eslintConfig”: {
“extends”: “react-app”
},
“browserslist”: {
“production”: [
“>0.2%”,
“not dead”,
“not op_mini all”
],
“development”: [
“last 1 chrome version”,
“last 1 firefox version”,
“last 1 safari version”
]
},
“description”: “This project was bootstrapped with [Create React App](https://github.com/facebook/create-react-app).”,
“main”: “index.js”,
“devDependencies”: {},
“repository”: {
“type”: “git”,
“url”: “demo”
},
“keywords”: [
“npm-demo”
],
“author”: “Anil”,
“license”: “ISC”
}

[/php]

The detail about:

· name: The name of the application/project
· version: The version of application.
· description: The describe about your application
· main: This is the entry/starting point of the app.
· scripts: The scripts which needs to be included in the application to run properly.
· engines: The versions of the node and npm used.
· keywords: It specifies the array of strings that characterizes the application.
· author: It consist of the name of the author
· license: The license of the application if applicable
· dependencies: Installed third party package using npm information
· devDependencies: The dependencies that are used only in the application development like GIT.
· repository: It contain the information about the type and url of the repository where application is host application

1. name
2. version

Name – The name is a mandatory directive in package.json file and it is a unique package/module name.

Version – The Version is a mandatory directive in package.json file and it contains the version information