[Solved] What will be the output of this code snippet?const { spawn } = require('child_process'); const child = spawn('nonexistentcommand'); child.on('error', (err) => console.log('Error:', err.message));... | Node.js

Node.js - Child Processes

What will be the output of this code snippet?

const { spawn } = require('child_process');
const child = spawn('nonexistentcommand');
child.on('error', (err) => console.log('Error:', err.message));
child.on('exit', (code) => console.log('Exit code:', code));

AError event is not triggered

BExit code: 1 Error: spawn nonexistentcommand ENOENT

CNo output, process runs silently

DError: spawn nonexistentcommand ENOENT Exit code: null

Step-by-Step Solution

Solution:

Step 1: Understand spawn failure behavior
Spawning a non-existent command triggers the 'error' event with ENOENT error.
Step 2: Check event order and exit code
The 'exit' event fires with code null because the process never started.
Final Answer:
Error: spawn nonexistentcommand ENOENT Exit code: null -> Option D
Quick Check:
Spawn error triggers 'error' event first [OK]

Quick Trick: Nonexistent commands trigger 'error' with ENOENT [OK]

Common Mistakes:

Expecting exit code 1 instead of null
Assuming no error event fires
Confusing event order

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More Node.js Quizzes

What will be the output of this code snippet?

Step 1: Understand spawn failure behavior

Step 2: Check event order and exit code

Final Answer:

Quick Check:

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