[Solved] Consider this code snippet:const { spawn } = require('child_process'); const child = spawn('node', ['-e', "process.exit(1)"]); child.... });What will be printed when this runs? | Node.js

Node.js - Child Processes

Consider this code snippet:

const { spawn } = require('child_process');
const child = spawn('node', ['-e', "process.exit(1)"]);
child.on('exit', (code) => {
  console.log('Exit code:', code);
});
child.on('error', (err) => {
  console.error('Error:', err);
});

What will be printed when this runs?

AExit code: 0

BError: Error message

CExit code: 1

DNo output

Step-by-Step Solution

Solution:

Step 1: Understand the child process command
The child runs a Node.js command that immediately exits with code 1 using process.exit(1).
Step 2: Check which event triggers
The process exits normally with code 1, so the 'exit' event fires with code 1; no 'error' event occurs.
Final Answer:
Exit code: 1 -> Option C
Quick Check:
process.exit(1) triggers 'exit' with code 1 [OK]

Quick Trick: process.exit(n) triggers 'exit' with code n, no 'error' [OK]

Common Mistakes:

Thinking exit code 1 triggers 'error' event
Expecting 'Exit code: 0' by default
Ignoring the 'exit' event output

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Consider this code snippet:

Step 1: Understand the child process command

Step 2: Check which event triggers

Final Answer:

Quick Check:

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