Buffer to string conversion in Node.js - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to convert a Buffer to a string using the default encoding.

Node.js

const buf = Buffer.from('hello');
const str = buf.[1]();

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

AtoArray

BtoBuffer

CtoJSON

DtoString

Attempts:

3 left

💡 Hint

Common Mistakes

Using toBuffer() which does not exist on Buffer instances.

Using toJSON() which returns a JSON object, not a string.

The toString() method converts a Buffer to a string using UTF-8 encoding by default.

2fill in blank

medium

Complete the code to convert a Buffer to a string using 'utf8' encoding explicitly.

Node.js

const buf = Buffer.from('world');
const str = buf.toString('[1]');

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

Autf8

Bascii

Cbase64

Dhex

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'ascii' which can misinterpret some characters.

Using 'base64' which encodes binary data, not text.

Specifying 'utf8' ensures the buffer is decoded as UTF-8 text.

3fill in blank

hard

Fix the error in the code to correctly convert the Buffer to a string.

Node.js

const buf = Buffer.from('test');
const str = buf.[1]('utf8');

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

Astringify

BtoStr

CtoString

Dconvert

Attempts:

3 left

💡 Hint

Common Mistakes

Using non-existent methods like toStr or convert.

Using JSON.stringify which does not convert Buffer to string.

The correct method to convert a Buffer to a string is toString(). Other methods do not exist or do not perform this conversion.

4fill in blank

hard

Fill both blanks to convert a Buffer to a string using 'base64' encoding and assign it to a variable.

Node.js

const buf = Buffer.from('data');
const encoded = buf.[1]([2]);

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

AtoString

B'base64'

C'utf8'

DtoBase64

Attempts:

3 left

💡 Hint

Common Mistakes

Using a method named toBase64 which does not exist.

Passing 'utf8' when base64 encoding is needed.

Use toString('base64') to convert the Buffer to a base64 encoded string.

5fill in blank

hard

Fill all three blanks to convert a Buffer to a string with 'hex' encoding and store it in a variable named hexString.

Node.js

const buf = Buffer.from('example');
const [1] = buf.[2]([3]);

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

AhexString

BtoString

C'hex'

DbufferString

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect variable names that don't match the task.

Using wrong method names or encodings.

Assign the result of buf.toString('hex') to the variable hexString to get the hex representation.