Running JavaScript using Node.js - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print 'Hello, Node.js!' to the console.

Javascript

console.[1]('Hello, Node.js!');

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

Alog

Bprint

Cwrite

Decho

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'print' or 'echo' which are not valid console methods in JavaScript.

Trying to use 'write' which is not a console method.

The console.log function prints messages to the console in Node.js.

2fill in blank

medium

Complete the command to run a JavaScript file named 'app.js' using Node.js.

Javascript

node [1]

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

Aapp.js

Brun

Cstart.js

Dindex.js

Attempts:

3 left

💡 Hint

Common Mistakes

Typing 'run' after node which is not needed.

Using a different file name than the one given.

To run a JavaScript file with Node.js, you type node followed by the file name, here app.js.

3fill in blank

hard

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

Javascript

const fs = require([1]);

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

A'file-system'

B'fs'

C'filesystem'

D'fs-module'

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect module names like 'file-system' or 'filesystem'.

Forgetting to put the module name inside quotes.

The correct module name to import the file system module is 'fs'.

4fill in blank

hard

Fill both blanks to create a simple HTTP server using Node.js.

Javascript

const http = require('http');
const server = http.[1]((req, res) => {
  res.[2]('Hello World');
});

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

AcreateServer

Bsend

Cwrite

Dlisten

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'listen' instead of 'createServer' for the first blank.

Using 'send' which is not a method on the response object in Node.js.

The createServer method creates the server, and res.write sends the response body.

5fill in blank

hard

Fill all three blanks to start the server listening on port 3000 and log a message.

Javascript

server.[1](3000, () => {
  console.[2]('Server is running on port ' + [3]);
});

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

Alisten

Blog

C3000

Dstart

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'start' instead of 'listen' to start the server.

Using 'print' or other console methods instead of 'log'.

Not using the port number variable or value correctly.

The listen method starts the server on a port, console.log prints the message, and 3000 is the port number.