Classes and OOP

Question 1

What is a class?

Answer 1

A class is a blueprint for an object in python, containing all properties, attributes, methods etc.

Question 2

Do classes create their own scope?

Answer 2

No, one must be very explicit when referring to things inside the class.

Question 3

What are the three main ideas of OOP?

Answer 3

Inheritance: the ability for a new class to specialise/modify the behaviour of existing classes.
Polymorphism, dynamic binding and duck typing: The ability to use an instance without regard for its type
Data encapsulation and private attributes

Question 4

What do you call a class that you inherit from?

Answer 4

parent/super class

Question 5

What is a static method?

Answer 5

A function defined inside a class, does not operate on the instance.

Question 6

What is a Class method?

Answer 6

A method operating on the class itself as opposed to an instance.

Question 7

How would you make a class attribute private?

Answer 7

self.__ = …

Question 8

Can private attributes be accessed outside the class?

Answer 8

Not directly, but they are not truly private.

Question 9

What are getters and setters?

Answer 9

Allow for updated interdependent attributes

Question 10

Explain the @property decorator (implement it in code)

Answer 10

Properties are calculated when accessed, meaning you can update dependent attributes.