Can you create an object of an interface?

Short answer: No, you cannot instantiate an interface. You can only use it as a reference type. ICar car = new Car(); // Interface reference // ICar c = new ICar(); // Not allowed

Example code

No, you cannot instantiate an interface. You can only use it as a reference type. ICar car = new Car(); // Interface reference
// ICar c = new ICar(); // Not allowed

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

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.