Quiz Discussion

If super class and subclass have same variable name, which keyword should be used to use super class?

• 1]

  super

• 2]

  this

• 3]

  upper

• 4]

  classname

Which of the following is used in implementing inheritance through class?

• 1]

  inherited

• 2]

  using

• 3]

  extends

• 4]

  implements

Does Java support multiple level inheritance?

• 1]

  True

• 2]

  False

What will be the output of the following Java 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)     
        }
   }

• 1]

  1 2
   

• 2]

  2 1

• 3]

  Runtime Error

• 4]

  Compilation Error

Which of the following is used for implementing inheritance through an interface?

• 1]

  inherited

• 2]

  using

• 3]

  extends

• 4]

  implements

Using which of the following, multiple inheritance in Java can be implemented?

• 1]

  Interfaces

• 2]

  Multithreading

• 3]

  Protected methods

• 4]

  Private methods

 A class member declared protected becomes a member of subclass of which type?

• 1]

  public member

• 2]

  private member

• 3]

  protected member

• 4]

  static member

All classes in Java are inherited from which class?

• 1]

  java.lang.class

• 2]

  java.class.inherited

• 3]

  java.class.object

• 4]

  java.lang.object

Static members are not inherited to subclass.

• 1]

  True

• 2]

  False

What is not type of inheritance?

• 1]

  Single inheritance

• 2]

  Double inheritance

• 3]

  Hierarchical inheritance

• 4]

   Multiple inheritance