Stream.duplex in Node.js — Node.js Technical Interview Questions & Answers

Stream.duplex in Node.js

Stream.duplex in Node.js

  • Stream.duplex (in node js) 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.duplex (in node js).
  • From the example next to this theory: Stream.duplex in Node.js — 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.duplex (in node js)? Then show createReadStream. Then name the trap.

Technical Interview Tip: What is Stream.duplex (in node js)? Show this: createReadStream. Trap: loading the whole file into RAM.

Code Examples for Stream.duplex in Node.js

Stream.duplex in Node.js — 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.duplex in Node.js — fs reads/writes files. Prefer promises/async APIs in real apps.

How to Explain Stream.duplex in Node.js to an Interviewer

What is Stream.duplex (in node js)?

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

Give one small example of Stream.duplex (in node js).

createReadStream Stream.duplex in Node.js — fs reads/writes files. Prefer promises/async APIs in real apps.

What mistake do beginners make with Stream.duplex (in node js)?

loading the whole file into RAM Show the fix

Where do you use Stream.duplex (in node js)?

an upload job read a big CSV