[Solved] Identify the error in this worker thread code snippet: const { Worker } = require('worker_threads'); const worker = new Worker('worker.js'); worker.on('message', msg => console.log(msg)); worker.... | Node.js

Node.js - Worker Threads

Identify the error in this worker thread code snippet:

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

const worker = new Worker('worker.js');
worker.on('message', msg => console.log(msg));
worker.postMessage('Start');

AWorker file path should be absolute or URL

BMissing event listener for 'error' event

CCannot create Worker with a string filename

DCannot call postMessage on Worker instance

Step-by-Step Solution

Solution:

Step 1: Check Worker constructor argument
The Worker constructor expects an absolute path or a URL, not just a relative string like 'worker.js'.
Step 2: Validate other options
Cannot create Worker with a string filename is incorrect because Worker can be created with a filename if path is correct. Missing event listener for 'error' event is good practice but not an error. Cannot call postMessage on Worker instance is wrong; postMessage is valid on Worker.
Final Answer:
Worker file path should be absolute or URL -> Option A
Quick Check:
Worker needs absolute path or URL = C [OK]

Quick Trick: Use absolute path or URL for Worker file [OK]

Common Mistakes:

Using relative paths without resolving them
Ignoring error event listeners
Thinking postMessage is invalid on Worker

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More Node.js Quizzes

Identify the error in this worker thread code snippet:

Step 1: Check Worker constructor argument

Step 2: Validate other options

Final Answer:

Quick Check:

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