Why modules are needed in Node.js - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the module correctly.

Node.js

const fs = require([1]);

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

A'fs'

Bfilesystem

C"fileSystem"

Dfs

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting quotes around the module name.

Using incorrect module names.

In Node.js, to use a built-in module like fs, you must require it by its name as a string.

2fill in blank

medium

Complete the code to export a function from a module.

Node.js

module.exports = [1];

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

Afunction readFile() {}

BreadFile()

C"readFile"

DreadFile

Attempts:

3 left

💡 Hint

Common Mistakes

Exporting a function call instead of the function.

Exporting the function name as a string.

To export a function, assign the function itself (not a call or string) to module.exports.

3fill in blank

hard

Fix the error in importing a custom module.

Node.js

const utils = require([1]);

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

A'utils.js'

B'../utils'

C'utils'

D'./utils'

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting the relative path prefix.

Including the file extension when not needed.

When importing a local module, you must use a relative path starting with ./ or ../.

4fill in blank

hard

Fill both blanks to create a module that exports an object with two functions.

Node.js

module.exports = { [1]: function() {}, [2]: () => {} };

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Astart

Bstop

Crun

Dpause

Attempts:

3 left

💡 Hint

Common Mistakes

Using invalid identifiers as keys.

Forgetting commas between object properties.

We export an object with keys naming the functions. Here, start and stop are function names.

5fill in blank

hard

Fill all three blanks to import a module, call a function, and log the result.

Node.js

const [1] = require('[2]');
const result = [3].calculate();
console.log(result);

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

AmathUtils

Bmath-utils

Cutils

Dutils.js

Attempts:

3 left

💡 Hint

Common Mistakes

Using file extension in require path.

Mismatching variable and module names.

We import the module as mathUtils from 'math-utils', then call mathUtils.calculate().