What is Node.js in Node.js - Interactive Quiz & Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the built-in HTTP module in Node.js.

Node.js

const http = require([1]);

Drag options to blanks, or click blank then click option'

A"fs"

B"http"

C"path"

D"express"

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'fs' which is for file system operations.

Using 'express' which is a third-party framework, not built-in.

The built-in HTTP module in Node.js is imported using require("http").

2fill in blank

medium

Complete the code to create a simple HTTP server that listens on port 3000.

Node.js

http.createServer((req, res) => {
  res.writeHead(200, { 'Content-Type': 'text/plain' });
  res.end('Hello World');
}).[1](3000);

Drag options to blanks, or click blank then click option'

Astart

Bopen

Clisten

Drun

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'start' which is not a method of the server object.

Using 'run' which is not valid here.

The method to start the server listening on a port is listen.

3fill in blank

hard

Fix the error in the code to correctly import the 'fs' module.

Node.js

const fs = require([1]);

Drag options to blanks, or click blank then click option'

A"fs"

B"file-system"

C"filesystem"

D"fileSystem"

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'file-system' which is not a built-in module name.

Using camelCase or other variations.

The correct module name for file system operations in Node.js is "fs".

4fill in blank

hard

Fill both blanks to create a server that responds with JSON data.

Node.js

const server = http.createServer((req, res) => {
  res.writeHead(200, { 'Content-Type': [1] });
  res.end(JSON.stringify({ message: [2] }));
});

Drag options to blanks, or click blank then click option'

A"application/json"

B"Hello"

C"text/plain"

D"World"

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'text/plain' as content type when sending JSON.

Putting the content type value without quotes.

The content type for JSON data is "application/json". The message string can be any text, here 'Hello'.

5fill in blank

hard

Fill all three blanks to export a function named 'startServer' from a module.

Node.js

function [1]() {
  console.log('Server started');
}

module.exports = [2] = [3];

Drag options to blanks, or click blank then click option'

AstartServer

DserverStart

Attempts:

3 left

💡 Hint

Common Mistakes

Using different names for function and export.

Using camelCase incorrectly.

The function name and the exported name should match and be 'startServer'.