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Question

What is the output of this program? 
    abstract class A 
    {
        int i;
        abstract void display();
    }    
    class B extends A 
    {
        int j;
        void display() 
        {
            System.out.println(j);
        }
    }    
    class Abstract_demo 
    {
        public static void main(String args[])
        {
            B obj = new B();
            obj.j=2;
            obj.display();    
        }
    }

a.

0

b.

2

c.

Runtime Error

d.

Compilation Error

Posted under Java Programming

Answer: (b).2

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