process.stdin and process.stdout in Node.js - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to read input from the user using process.stdin.

Node.js

process.stdin.setEncoding('[1]');

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Abinary

Bascii

Cutf8

Dhex

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'ascii' which does not support all characters.

Using 'binary' which is for raw data, not text.

The encoding 'utf8' is commonly used to read text input correctly from process.stdin.

2fill in blank

medium

Complete the code to write 'Hello World' to the console using process.stdout.

Node.js

process.stdout.[1]('Hello World\n');

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Awrite

Bread

Cend

Don

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'read' which is for input streams.

Using 'end' which closes the stream.

The method 'write' sends data to the standard output stream.

3fill in blank

hard

Fix the error in the code to correctly listen for data input from process.stdin.

Node.js

process.stdin.on('[1]', (data) => {
  console.log('You typed:', data);
});

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Ainput

Breadable

Cwrite

Ddata

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'input' which is not a valid event.

Using 'write' which is for output streams.

The 'data' event is emitted when the stream receives input data.

4fill in blank

hard

Fill both blanks to create a program that reads a line and then ends the input stream.

Node.js

process.stdin.setEncoding('[1]');
process.stdin.on('[2]', (input) => {
  console.log('Input:', input);
  process.stdin.end();
});

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

Autf8

Bdata

Creadable

Dascii

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'ascii' encoding which may not handle all characters.

Listening to 'readable' event but not handling data properly.

Set encoding to 'utf8' to read text, and listen to 'data' event to get input.

5fill in blank

hard

Fill all three blanks to create a program that reads input, converts it to uppercase, and writes it back.

Node.js

process.stdin.setEncoding('[1]');
process.stdin.on('[2]', (chunk) => {
  const upper = chunk.[3]();
  process.stdout.write(upper);
});

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

Autf8

Bdata

CtoUpperCase

DtoLowerCase

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'toLowerCase' instead of 'toUpperCase'.

Listening to wrong event name.

Not setting encoding and getting buffer instead of string.

Use 'utf8' encoding, listen to 'data' event, and convert input to uppercase with 'toUpperCase()'.