Worker.isMainThread Property — Node.js Technical Interview Questions & Answers

Worker.isMainThread Property

Worker.isMainThread Property

  • Worker.isMainThread Property is a Node.js topic. In plain words you use it for use all CPU cores in production box. Don’t start with a slogan — start with that picture.
  • Smallest example: cluster.fork or PM2. Type it, run it, and say what you see. If you can do that from memory, you know Worker.isMainThread Property.
  • From the example next to this theory: Worker.isMainThread Property: find user 2, then list names. Say both prints..
  • Trap: in-memory session without sticky. Fix that before you talk about advanced Node.js.
  • Viva: what is Worker.isMainThread Property? Then show cluster.fork or PM2. Then name the trap.

Technical Interview Tip: What is Worker.isMainThread Property? Show this: cluster.fork or PM2. Trap: in-memory session without sticky.

Code Examples for Worker.isMainThread Property

Worker.isMainThread Property — working example

// Worker.isMainThread Property
const users = [
  { id: 1, name: "Asha" },
  { id: 2, name: "Ravi" },
];

function findUser(id) {
  return users.find((u) => u.id === id) ?? null;
}

console.log(findUser(2));
console.log(users.map((u) => u.name));

Worker.isMainThread Property: find user 2, then list names. Say both prints.

How to Explain Worker.isMainThread Property to an Interviewer

What is Worker.isMainThread Property?

Used for use all CPU cores production box Not just the heading

Give one small example of Worker.isMainThread Property.

cluster.fork or PM2 Worker.isMainThread Property: find user 2, then list names. Say both prints.

What mistake do beginners make with Worker.isMainThread Property?

in-memory session without sticky Show the fix

Where do you use Worker.isMainThread Property?

production box use all CPU cores