stream.Writable close Event — Node.js Technical Interview Questions & Answers

stream.Writable close Event

stream.Writable close Event

  • stream.Writable close Event is a Node.js topic. In plain words you use it for read a big CSV in an upload job. Don’t start with a slogan — start with that picture.
  • Smallest example: createReadStream. Type it, run it, and say what you see. If you can do that from memory, you know stream.Writable close Event.
  • From the example next to this theory: stream.Writable close Event — fs reads/writes files. Prefer promises/async APIs in real apps..
  • Trap: loading the whole file into RAM. Fix that before you talk about advanced Node.js.
  • Viva: what is stream.Writable close Event? Then show createReadStream. Then name the trap.

Technical Interview Tip: What is stream.Writable close Event? Show this: createReadStream. Trap: loading the whole file into RAM.

Code Examples for stream.Writable close Event

stream.Writable close Event — working example

const fs = require("fs");
const path = require("path");

const file = path.join(__dirname || ".", "demo.txt");
fs.writeFileSync(file, "hello node\n");
const text = fs.readFileSync(file, "utf8");
console.log(text.trim());
fs.unlinkSync(file);

stream.Writable close Event — fs reads/writes files. Prefer promises/async APIs in real apps.

How to Explain stream.Writable close Event to an Interviewer

What is stream.Writable close Event?

Used for read a big CSV an upload job Not just the heading

Give one small example of stream.Writable close Event.

createReadStream stream.Writable close Event — fs reads/writes files. Prefer promises/async APIs in real apps.

What mistake do beginners make with stream.Writable close Event?

loading the whole file into RAM Show the fix

Where do you use stream.Writable close Event?

an upload job read a big CSV