Junior From PDF OOP C# OOP

What is runtime polymorphism?

Q: What is runtime polymorphism?

Short answer: Also called dynamic polymorphism. Resolved at runtime using method overriding. class Vehicle { public virtual void Start() => Console.WriteLine("Vehicle starts"); } class Car : Vehicle { public override void Start() => Console.WriteLine("Car starts"); } Vehicle v = new Car(); v.Start(); // Calls Car's Start() at runtime Real-world example (ShopNest) Checkout calls IPaymentGateway.Charge() . Razorpay and Stripe adapters implement the same interface, so ShopNest can switch gateways without rewriting the order service. Say this in the interview Define — one clear sentence (the short answer above). Example — relate it to a project like ShopNest or your real work. Trade-off — when you would not use it.

Short answer: Also called dynamic polymorphism. Resolved at runtime using method overriding. class Vehicle { public virtual void Start() => Console.WriteLine("Vehicle starts"); } class Car : Vehicle { public override void Start() => Console.WriteLine("Car starts"); } Vehicle v = new Car(); v.Start(); // Calls Car's Start() at runtime

Real-world example (ShopNest)

Checkout calls IPaymentGateway.Charge(). Razorpay and Stripe adapters implement the same interface, so ShopNest can switch gateways without rewriting the order service.

Say this in the interview

Define — one clear sentence (the short answer above).
Example — relate it to a project like ShopNest or your real work.
Trade-off — when you would not use it.

Previous Next