🚀 Q8 – C# Abstract Class vs Interface | Top C# Interview Questions and Answers

🚀Confused about when to use an abstract class and when to use an interface in C#? In this 5-minute showdown, we break it down with real-world analogies, a clear visual slide, and practical examples including a Payment Processing demo.

🔷 Abstract Class = "IS-A" → use when you want to share logic and structure
🔶 Interface = "CAN-DO" → use when you want to define behavior or capability

In this video, you’ll learn:

What is an abstract class in C#

What is an interface and how it differs

When to use abstract classes vs interfaces in real projects

A fresh real-world example with fraud check and payment processing

👨‍💻 Perfect for C# beginners to intermediate devs preparing for interviews or mastering OOP.

💬 Let us know in the comments — what’s your favorite use case for interfaces?

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🎥 Watch the full “100 C# Interview Questions” playlist here: https://www.youtube.com/playlist?list=PLeziwY4vuALprapkslzanYRVQKQxFyMuy

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Видео 🚀 Q8 – C# Abstract Class vs Interface | Top C# Interview Questions and Answers канала STEP BY STEP CODING