OOP (Python)

Question 1

Advantage of OOP

Answer 1

Better for planning
Source code is written independently of main code
Creates a good framework
Easier to maintain

Question 2

What is a class in OOP

Answer 2

The class is a blueprint for an object. Made of attributes and methods

Question 3

What are the attribute

Answer 3

Properties defined within the class. They are private

Question 4

What are the methods

Answer 4

The procedures or functions are defined in the class. Usually public and can be accessed inside and outside the class

Question 5

What is instantiation

Answer 5

Creating an object from a class using a constructor

Question 6

What is encapsulation

Answer 6

Technique of hiding details from the user to reduce code complexity. Way to restrict direct access to the class

Question 7

What is inheritance

Answer 7

Requires attributes to be protected. But allows for methods and attributes to be passed down to child objects.
Drawn: Child —> Parent

Question 8

What is polymorphism

Answer 8

In a child object overriding a method or attribute of the parent node

Question 9

What are the signs for access modifiers in UML OOP

Answer 9

’+’ Public
‘-‘ Private
‘#’ Protected

Question 10

What is composition

Answer 10

The combination of simpler classes into fusing into a more complex one. Parent class needed as cannot survive on its own.
Drawn using a shaded diamond

Question 11

What is aggregation

Answer 11

Where the classes have a connection. If the parent class is deleted the lower instance still survives. Drawn using a unshaded diamond