ASP.NET Software Developer Interview Questions and Answers

Abstract classes are classes that cannot be instantiated and can have both implemented and abstract methods. Interfaces are contracts that define a set of methods that a class must implement.

• Abstract classes can have constructors, interfaces cannot

• A class can inherit from only one abstract class, but can implement multiple interfaces

• Abstract classes can have access modifiers, interfaces cannot

• Interfaces can have properties, abstract classes can have fields

• Abstract classes can...read more

C# does not support multiple inheritance.

• C# only allows a class to inherit from a single base class.

• Interfaces can be used to achieve similar functionality.

• Diamond problem can be avoided in C# through interfaces.

• Composition over inheritance is a recommended approach.