OOP REVIEW

Question 1

Describe the general process through which superclasses are created

Answer 1

• Superclasses are created through the process called "generalization“ 
Common features (methods or variables) are factored out of object classifications (ie. classes). 
Those features are formalized in a class. This becomes the superclass 
The classes from which the common features were taken become subclasses to the newly created super class

Question 2

What is the purpose of superclasses

Answer 2

Often, some superclass do not have a "meaning" or does not directly relate to a "thing" in the real world
• It is an artifact of the generalization process
• Because of this, abstract classes cannot be instantiated. They act as place holders for abstraction

Question 3

Draw a UML showing the relationships between the abstract superclass vehicle and car and track

Answer 3

*See notes for UML

Question 4

Write code to show how an abstract class employee can be made and inherited

Answer 4

*See notes for code

Question 5

Struct and classes are present in the C++ programming language. What is the main
difference between struct and classes in the C++ programming language?

Answer 5

A structure is a collection of variables of different data types with the same name. A class in C++ is a single structure that contains a collection of related variables and functions. The struct keyword can be used to declare a structure