What is the difference between __proto__ and prototype?

Short answer: Property Description prototy pe A property of functions, used when creating objects with new. __proto __ A property of objects, points to the object’s prototype (used in the prototype chain).

Example code

function Person() {} console.log(Person.prototype); // prototype object const p = new Person(); console.log(p.__proto__); // same as Person.prototype

Real-world example (ShopNest)

Prefer arrow functions for React/event callbacks in ShopNest so this is not accidentally rebound.

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.