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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.

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