[Solved] Given this worker pool code snippet, what will be logged to the console? const { Worker } = require('worker_threads'); const worker = new Worker(` const { parentPort } = require('worker_threads');... | Node.js

Node.js - Worker Threads

Given this worker pool code snippet, what will be logged to the console?

const { Worker } = require('worker_threads');

const worker = new Worker(`
  const { parentPort } = require('worker_threads');
  parentPort.postMessage('done');
`, { eval: true });

worker.on('message', msg => console.log(msg));

Adone

Bundefined

CError: Cannot find module 'worker_threads'

DNo output

Step-by-Step Solution

Solution:

Step 1: Understand inline worker code with eval option
The worker runs code that sends 'done' message to parent via postMessage.
Step 2: Check event listener for 'message'
The main thread listens for 'message' and logs the received message.
Final Answer:
done -> Option A
Quick Check:
Worker message logged = done [OK]

Quick Trick: Worker sends message, main thread logs it [OK]

Common Mistakes:

Expecting no output due to async nature
Confusing error with missing modules
Assuming undefined is logged

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More Node.js Quizzes

Given this worker pool code snippet, what will be logged to the console?

Step 1: Understand inline worker code with eval option

Step 2: Check event listener for 'message'

Final Answer:

Quick Check:

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