File System — Node.js Technical Interview Questions & Answers

File System

File System

  • File System is a Node.js topic. In plain words you use it for a short File System example in a script or API on localhost. Don’t start with a slogan — start with that picture.
  • Smallest example: the smallest File System example you can type. Type it, run it, and say what you see. If you can do that from memory, you know File System.
  • From the example next to this theory: File System — fs reads/writes files.
  • Trap: only saying “File System” with no example. Fix that before you talk about advanced Node.js.
  • Viva: what is File System? Then show the smallest File System example you can type. Then name the trap.

Technical Interview Tip: What is File System? Show this: the smallest File System example you can type. Trap: only saying “File System” with no example.

Code Examples for File System

File System — 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);

File System — fs reads/writes files. Prefer promises/async APIs in real apps.

How to Explain File System to an Interviewer

What is File System?

Used for a short File System example a script or API on localhost Not just the heading

Give one small example of File System.

the smallest File System example you can type File System — fs reads/writes files

What mistake do beginners make with File System?

only saying “File System” with no example Show the fix

Where do you use File System?

a script or API on localhost a short File System example