Abstract Class vs Interfaces

Question

Accepted Answer

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 provide default implementations for some methods, interfaces cannot