path.extname() function in Node.js — Node.js Technical Interview Questions & Answers

path.extname() function in Node.js

path.extname() function in Node.js

  • path.extname() function (in node js) is a Node.js topic. In plain words you use it for join folder + file in Windows + Linux. Don’t start with a slogan — start with that picture.
  • Smallest example: path.join('notes', 'a.txt'). Type it, run it, and say what you see. If you can do that from memory, you know path.extname() function (in node js).
  • From the example next to this theory: path.extname() function in Node.js — path.join builds OS-safe paths; extname reads the extension..
  • Trap: string concat with / only. Fix that before you talk about advanced Node.js.
  • Viva: what is path.extname() function (in node js)? Then show path.join('notes', 'a.txt'). Then name the trap.

Technical Interview Tip: What is path.extname() function (in node js)? Show this: path.join('notes', 'a.txt'). Trap: string concat with / only.

Code Examples for path.extname() function in Node.js

path.extname() function in Node.js — working example

const path = require("path");
const full = path.join("users", "asha", "docs");
console.log(full);
console.log(path.extname("report.pdf"));

path.extname() function in Node.js — path.join builds OS-safe paths; extname reads the extension.

How to Explain path.extname() function in Node.js to an Interviewer

What is path.extname() function (in node js)?

Used for join folder + file Windows + Linux Not just the heading

Give one small example of path.extname() function (in node js).

path.join('notes', 'a.txt') path.extname() function in Node.js — path.join builds OS-safe paths; extname reads the extension.

What mistake do beginners make with path.extname() function (in node js)?

string concat with / only Show the fix

Where do you use path.extname() function (in node js)?

Windows + Linux join folder + file