Chapter 27 Object-oriented Progrmamming (OOP)

Question 1

What is a class?

Answer 1

A class is a type or a blueprint for creating objects that has a record containing its attributes which are declared as private and has methods outside the record declared as public that operate on the attributes.

Question 2

What are attributes?

Answer 2

Attributes are data items of a class

Question 3

What are methods?

Answer 3

Methods are subroutines of a class that act on the data in the record

Question 4

What is an object?

Answer 4

An object is an instance of a class, for example
Object: MyCourse
Type: Course
An object becomes a course type if MyCourse = Course(“English”)

Question 5

What happens in encapsulation?

Answer 5

The methods operating, using or editing the attributes

Question 6

What is a constructor?

Answer 6

A constructor is a method that instantiates(impersonates) a new object.

Question 7

In what can we show a class, its attributes and methods?

Answer 7

We can represent a class, its attributes and methods in a class diagram.

Question 8

What is polymorphism?

Answer 8

Polymorphism is a behaviour of a code when reacting to different classes in the hierrarchy

Question 9

What is a containment?

Answer 9

Containment is a relationship between two classes where one class has a component that is of the other class type. 
Can be represented using a containment diagram