can abstract method be static code example

Example 1: Can abstract methods have static keyword

No, abstract method is a method that's meant to be overridden, 
only the instance methods can be override

Example 2: is it necessary for abstract class to have abstract method

No, abstract class can have zero abstract methods.

Example 3: can you declare an abstract method in a non abstract class

No. A normal class(non-abstract class) cannot have abstract methods.