Creating a basic Express server - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the Express library.

Express

const express = require('[1]');

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

Aexpress

Bhttp

Cfs

Dpath

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'http' instead of 'express' to import Express.

Forgetting to put the library name in quotes.

The Express library is imported using require('express'). This allows us to use Express functions in our code.

2fill in blank

medium

Complete the code to create an Express application instance.

Express

const app = [1]();

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

Aapp

Bexpress

Cserver

Dhttp

Attempts:

3 left

💡 Hint

Common Mistakes

Calling a variable named 'http' instead of 'express'.

Trying to call 'app()' before defining it.

Calling express() creates an Express application instance, which we store in app.

3fill in blank

hard

Fix the error in the code to make the server listen on port 3000.

Express

app.[1](3000, () => {
  console.log('Server is running on port 3000');
});

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

Alisten

Bstart

Crun

Dopen

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'start' or 'run' which are not Express methods.

Forgetting to call the method as a function.

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

4fill in blank

hard

Fill both blanks to define a GET route for the root URL that sends 'Hello World!'.

Express

app.[1]('[2]', (req, res) => {
  res.send('Hello World!');
});

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

Aget

Bpost

C/

D/home

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'post' instead of 'get' for the route method.

Using '/home' instead of '/' for the root URL.

The get method defines a route for GET requests. The root URL is '/'.

5fill in blank

hard

Fill all three blanks to import Express, create an app, and start the server on port 4000.

Express

const [1] = require('[2]');
const app = [3]();
app.listen(4000, () => {
  console.log('Server running on port 4000');
});

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

Aexpress

Dhttp

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'http' instead of 'express' in require.

Using different variable names inconsistently.

We import Express with require('express'), assign it to express, then call express() to create the app.