What is a primitive data type?

Give examples of primitive data types and explain what they are.

What is a reference type and how do they work?

What is a string?

What is an array?

What is a 2D array?

What is an abstract class?

What is an abstract method?

What is a base class?

What is a subclass?

What is a static variable?

What is an attribute?

What is an interface?