Quiz 3 - Bce Rep - Quiz & Trivia

1. To explicitly call a method from super class we use keyword;

Super

Implements

Instanceof

This

2. Which of the following is true for Method Overriding ;

Static binding occurs in Method Overriding

Late or Dynamic binding occurs in Method overriding

Both static binding and Late Binding occur in method overriding

No binding occurs in method overriding

3. Method overloading is an example of Dynamic Polymorphism

True

False

4. In polymorphism, we create object of a subclass and initialize it by assigning a reference of a super class.

True

False

5. Given the following code;public class Employee{ public abstract String toString();}which of the following statement is true

The keywords public and abstract cannot be used together

The method toString() in class Employee must have a body

You must add return statement inside the body of tostring method

Class Employee must be define abstract

6. Methods and Fields from a Super Class can only be visible in a Sub class when they are;

Public

Private

Protected

Both Public or Protected members are visible

7. In an is-a relationship, an object of a subclass can also be treated as an object of its superclass.

True

False

8. Which of these is not a correct statement?

Every class containing abstract method must be declared abstract.

Abstract class defines only the structure of the class not its implementation.

Abstract class can be instantiated by new operator.

Abstract class can be inherited.

9. Suppose A is an abstract class and B is a subclass of A. Both A and B have a default constructor. which of the following is true;

1. A a = new A();
2. A a = new B();
3. B b = new A();
4. B b = new B();

1 and 2

2 and 3

3 and 4

2 and 4

1 and 3

1 and 4