Hierarchical Inheritance – One base, multiple derived classes.?

Short answer: class Vehicle {} // Base class Car : Vehicle {} // Single/Multilevel class Bike : Vehicle {} // Hierarchical

Example code

class Vehicle {} // Base
class Car : Vehicle {} // Single/Multilevel
class Bike : Vehicle {} // Hierarchical

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.