What is the Poll phase in the Node.js event loop — Node.js Technical Interview Questions & Answers

What is the Poll phase in the Node.js event loop

What is the Poll phase in the Node.js event loop

  • the Poll phase in the Node.js event loop (what is) is a Node.js topic. In plain words you use it for wait for DB then reply in one Node process. Don’t start with a slogan — start with that picture.
  • Smallest example: async I/O, don’t block. Type it, run it, and say what you see. If you can do that from memory, you know the Poll phase in the Node.js event loop (what is).
  • From the example next to this theory: What is the Poll phase in the Node.
  • Trap: fs.readFileSync on a huge file. Fix that before you talk about advanced Node.js.
  • Viva: what is the Poll phase in the Node.js event loop (what is)? Then show async I/O, don’t block. Then name the trap.

Technical Interview Tip: What is the Poll phase in the Node.js event loop (what is)? Show this: async I/O, don’t block. Trap: fs.readFileSync on a huge file.

Code Examples for What is the Poll phase in the Node.js event loop

What is the Poll phase in the Node.js event loop — working example

const EventEmitter = require("events");
const bus = new EventEmitter();

bus.on("ping", (n) => console.log("pong", n));
bus.emit("ping", 1);
bus.emit("ping", 2);

What is the Poll phase in the Node.js event loop — eventEmitter is the pub/sub core used across Node APIs.

How to Explain What is the Poll phase in the Node.js event loop to an Interviewer

What is the Poll phase in the Node.js event loop (what is)?

Used for wait for DB then reply one Node process Not just the heading

Give one small example of the Poll phase in the Node.js event loop (what is).

async I/O, don’t block What is the Poll phase in the Node

What mistake do beginners make with the Poll phase in the Node.js event loop (what is)?

fs.readFileSync on a huge file Show the fix

Where do you use the Poll phase in the Node.js event loop (what is)?

one Node process wait for DB then reply