Q) What is output of fallowing program?

A)

class b

{

       static int a;

       static

       {

              System.out.println(a);

       }

}

class c {

       public static void main(String[] args) {

              System.out.println("I am first");

              System.out.println("a :"+b.a);

       }

}

Output:
I am first

0

a :0

->here when 2 classes are there when javac is given to the JVM ‘.class’ of c and b is created.

->Now after execution ‘javac’ is given to JVM.JVM loaded only .class file is loaded the firstly

 ‘main ()’ is called and ‘I am first’ is printed.

->After that ‘b.a’ is called then ‘b’ class is loaded secondary memory to prim memory and firstly static variable memory is allocated and then static block is executed.

->Default values are then printed and later a=0 is printed.