What is a class in OOP?

Short answer: A blueprint or template for creating objects. Defines properties (data) and methods (behavior) that the objects will have. public class Car

Example code

{
public string Model { get; set; }
public void Start() { Console.WriteLine("Car started"); }
}

Real-world example (ShopNest)

Think of ShopNest’s Product, Cart, and Order classes: each object holds data + behavior, so pricing rules stay next to the data they use.

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.