Quiz 3 - Bce Rep - Trivia & Questions

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Online quiz BCE repeaters

Questions and Answers

1.

Methods and Fields from a Super Class can only be visible in a Sub class when they are;
- A.
  
  Public
- B.
  
  Private
- C.
  
  Protected
- D.
  
  Both Public or Protected members are visible
Correct Answer
D. Both Public or Protected members are visible
2.

In an is-a relationship, an object of a subclass can also be treated as an object of its superclass.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True
3.

In polymorphism, we create object of a subclass and initialize it by assigning a reference of a super class.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False
4.

To explicitly call a method from super class we use keyword;
- A.
  
  Super
- B.
  
  Implements
- C.
  
  Instanceof
- D.
  
  This
Correct Answer
A. Super
5.

Which of these is not a correct statement?
- A.
  
  Every class containing abstract method must be declared abstract.
- B.
  
  Abstract class defines only the structure of the class not its implementation.
- C.
  
  Abstract class can be instantiated by new operator.
- D.
  
  Abstract class can be inherited.
Correct Answer
C. Abstract class can be instantiated by new operator.
6.

Method overloading is an example of Dynamic Polymorphism
- A.
  
  True
- B.
  
  False
Correct Answer
B. False
7.

Which of the following is true for Method Overriding ;
- A.
  
  Static binding occurs in Method Overriding
- B.
  
  Late or Dynamic binding occurs in Method overriding
- C.
  
  Both static binding and Late Binding occur in method overriding
- D.
  
  No binding occurs in method overriding
Correct Answer
B. Late or Dynamic binding occurs in Method overriding
8.

Given the following code;public class Employee{ public abstract String toString();}which of the following statement is true
- A.
  
  The keywords public and abstract cannot be used together
- B.
  
  The method toString() in class Employee must have a body
- C.
  
  You must add return statement inside the body of tostring method
- D.
  
  Class Employee must be define abstract
Correct Answer
D. Class Employee must be define abstract
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();
- A.
  
  1 and 2
- B.
  
  2 and 3
- C.
  
  3 and 4
- D.
  
  2 and 4
- E.
  
  1 and 3
- F.
  
  1 and 4
Correct Answer
D. 2 and 4

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Current Version
Mar 20, 2022

Quiz Edited by
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Nov 19, 2014

Quiz Created by
Aamirakbar

Quiz 3 - Bce Rep

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

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

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

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

Which of these is not a correct statement?

Method overloading is an example of Dynamic Polymorphism

Which of the following is true for Method Overriding ;

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

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();