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

Node.js - Child Processes

What will be the output of this Node.js code snippet?

const { fork } = require('child_process');
const child = fork('child.js');
child.on('message', msg => console.log(msg));
child.send('Hello');

Assuming 'child.js' sends back the message it receives.

ANo output

Bundefined

CError: child.js not found

DHello

Step-by-Step Solution

Solution:

Step 1: Understand fork and message passing
Fork creates a child process running 'child.js'. The parent sends 'Hello' and listens for messages.
Step 2: Behavior of child.js
If 'child.js' sends back the received message, the parent will log 'Hello'.
Final Answer:
Hello -> Option D
Quick Check:
Message passing works correctly = D [OK]

Quick Trick: fork allows two-way messaging between parent and child [OK]

Common Mistakes:

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