What is a constructor?

Short answer: A special method used to initialize objects when they are created. Has the same name as the class and no return type. public class Car

Example code

{
public string Model;
public Car(string model) { Model = model; }
}
Car car = new Car("Tesla");

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.