What is the difference between an abstract class and an interface

What is the difference between an argument and a parameter?

What is the difference between overloading and overriding?

Immutable objects are automatically thread-safe

What is method overloading and method overriding

Does Java provide any construct to find out the size of an object

What is protected

What is a Java Virtual Machine?

Why java does not support pointers?

What is encapsulation?

What is polymorphism