Abstract Class V/s Interface
- An Abstract class can have implementation for some of its methods. But, the interface can't have implementations for any of its methods
- An Abstract class can have fields but the interface does not have fields
- An Interface can inherit from another interface, but, can't inherit from another abstract class; but an abstract class can inherit from another abstract class and another interface
- The Abstract class members can have access modifiers, whereas, the interface member doesn't have access modifiers
Structure V/s Class
- A Class is a reference type, so it is stored in a Heap. Structure is a value type, so it is stored in a stack
- A Class has inheritance, but a structure does not have inheritance
- In a Class, there is a constructor. But in a structure, there may or may not be a constructor
- By default, a Class has a private access modifier and a structure has a public modifier
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