What is inheritance?

Short answer: Mechanism where a class (derived/child) inherits properties and methods from another class (base/parent). Promotes code reusability. class Car : Vehicle

Example code

{
public override void Start() { Console.WriteLine("Car started");
}
}

Real-world example (ShopNest)

ShopNest has a base PaymentMethod with virtual decimal Fee(). UpiPayment and CardPayment override the fee logic without changing the checkout caller.

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.