Inheritance

Q: What will be the output of the following program?
 class A
 {
    public int i;
    protected int j;
 } 
 class B extends A
 { 
    int j;
    void display()      
    {
        super.j = 3;
        super.i =  10;         
 	System.out.println(super.i + " " + super.j);         	
 	System.out.println(i + " " + j);
    } 
} 
class Output  
{
    public static void main(String args[])     
    {
        B obj = new B();
        obj.i=1;
        obj.j=2;
        obj.display();   
	}
}
A: 10  3   10  2
Q: The closest common ancestor of RuntimeException, Error, IOException, and ClassNotFoundException is:
A: Throwable
Q: Which of these is correct way of calling a constructor having no parameters, of superclass A by subclass B?
A: super();
Q: If super class and subclass have the same variable name, which keyword should be used to use super class?
A: super
Q: What will be the output of the following program?
final class A 
{
    int i;
}    
class B extends A 
{
    int j;
    System.out.println(j + " " + i);  
}    
class inheritance {
    public static void main(String args[]) {
        B obj = new B();
        obj.display();     
    }
}
A: Compile Time Error
Q: A class member declared protected becomes a member of a subclass of which type?
A: private member
Q: What will be the output of the following program?
class A {
    public int i;
    public int j;
    A()
    {
        i = 1;
        j = 2;
	}
}
class B extends A { 
    int a; 
	B()
    {
        super();
    }
}
class super_use {
    public static void main(String args[]) {
        B obj = new B();
        System.out.println(obj.i + " " + obj.j);
    }
}
A: 1 2
Q: What will be the output of the following program?
class A {
   public int i;
   private int j;
}   
class B extends A {
    void display() {
       super.j = super.i + 1;
       System.out.println(super.i + " " + super.j);
    }
} 
class inheritance {
   public static void main(String args[]) {
       B obj = new B();
       obj.i=1;
       obj.j=2;  
       obj.display();    
   }
}
A: Compile Time Error
Q: If there are 5 classes, E is derived from D, D from C, C from B, and B from A. Which class constructor will be called first if an object of type E or D is created?
A: A
Q: Which of the following is used for implementing inheritance through classes?
A: extends
Q: Which of the following, Multiple inheritance in Java can be implemented?
A: Interfaces
Q: Which of these is the correct way of inheriting class A by class B?
A: class B extends A {}
Q: In order to restrict a variable of a class from inheriting to subclass, how variable should be declared?
A: Private
Q: What would be the result if a class extended two interfaces, both of which have a method with the same name and signature?Let's assume that the class is not implementing that method.
A: Compile time error
Q: Which of these methods of the Object class can clone an object?
A: Object clone()