Module 2: Introduction to Object Oriented Programming (cont.)

Question 1

_____ can be defined as the process where one class acquires the properties (methods and
fields) of another. With the use of _____ the information is made manageable in a hierarchical
order.

Answer 1

Inheritance

Question 2

The class which inherits the properties of other is known as _____ (derived class, child class).

Answer 2

subclass

Question 3

The class whose properties are inherited is known as _____ (base class, parent class).

Answer 3

superclass

Question 4

To inherit from a class, use the _____ keyword.

Answer 4

extends

Question 5

If you don’t want other classes to inherit from a class, use the _____ keyword.

Answer 5

final

Question 6

_____ is the ability of an object to take on many forms.

Answer 6

Polymorphism. The most common use of
polymorphism in OOP occurs when a parent class reference is used to refer to a child class object.

Question 7

The meaning of _____, is to make sure that “sensitive” data is hidden from users.

Answer 7

Encapsulation.
To achieve this, you must:
* declare class variables/attributes as private
* provide public get and set methods to access and update the value of a private variable

Question 8

The _____ method returns the variable value, and the _____ method sets the value.

Answer 8

get and set

Question 9

_____ is the process of hiding certain details and showing only essential information to the user.

Answer 9

Abstraction

Question 10

_____ is a restricted class that cannot be used to create objects (to access it, it must be inherited from
another class).

Answer 10

Abstract class

Question 11

_____ can only be used in an abstract class, and it does not have a body. The body is provided by
the subclass (inherited from)

Answer 11

Abstract method