What are callbacks?

Short answer: Functions passed as arguments to run after another function completes. Example: setTimeout(() => console.log("Hello after 1s"), 1000);

Example code

Functions passed as arguments to run after another function completes. Example: setTimeout(() => console.log("Hello after 1s"), 1000);

Real-world example (ShopNest)

ShopNest’s browser cart uses modern JavaScript: fetch APIs with async/await, modules, and clear error handling.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.