[Solved] What output will the following Node.js cluster code produce?const cluster = require('cluster'); if (cluster.isPrimary) { cluster.fork(); cluster.fork(); } else { console.log(`Worker ${cluster.worker.... | Node.js

Node.js - Worker Threads

What output will the following Node.js cluster code produce?

const cluster = require('cluster');
if (cluster.isPrimary) {
  cluster.fork();
  cluster.fork();
} else {
  console.log(`Worker ${cluster.worker.id} is running`);
}

AError because cluster.isPrimary is undefined

BOne line: 'Worker 1 is running'

CNo output because cluster.fork() is called in the worker

DTwo lines: 'Worker 1 is running' and 'Worker 2 is running'

Step-by-Step Solution

Solution:

Step 1: Identify primary process
cluster.isPrimary is true in the main process, so it forks two workers.
Step 2: Worker processes run else block
Each worker logs its id with console.log.
Final Answer:
Two lines printed: 'Worker 1 is running' and 'Worker 2 is running' (Two lines: 'Worker 1 is running' and 'Worker 2 is running').
Quick Check:
Primary forks workers; workers execute else block. [OK]

Quick Trick: Primary forks workers; workers run else block. [OK]

Common Mistakes:

Confusing cluster.isPrimary with cluster.isWorker
Expecting output from primary process
Calling cluster.fork() inside worker process

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More Node.js Quizzes

What output will the following Node.js cluster code produce?

Step 1: Identify primary process

Step 2: Worker processes run else block

Final Answer:

Quick Check:

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