What are the restrictions that are applied to the Java static methods?

Why is the main method static?

Can we override the static methods?

What is the static block?

Can we execute a program without main() method?

What is the difference between static (class) method and instance method?

Can we make constructors static?

Can we make the abstract methods static in Java?

Can we declare the static variables and methods in an abstract class?

What is this keyword in java?

What are the main uses of this keyword?