mod08 - Python Object-Oriented Programming

Question 1

What is data encapsulation?

Answer 1

Binding data into a single object.

Question 2

What is data hiding?

Answer 2

Access to an object’s data.

Object’s ability to hide its data attributes from code that is outside of the object.

Question 3

What is inheritance?

Answer 3

Makes a new object based on an existing object.

Question 4

What is polymorphism?

Answer 4

Object’s ability to take different forms.

Allows subclasses to have methods with the same names as methods in their superclasses.

Question 5

What is __init__()?

Answer 5

Constructor AKA the initializer. Does not return the new instance of a class.

Question 6

What is __del__()?

Answer 6

Deconstructor

Question 7

What is __new__()?

Answer 7

First step of instance creation. Unlike __init__(), this dunder method RETURNS the new instance of a class.

Question 8

What is the difference between __str__() and __repr__()?

Answer 8

__str__() returns a human-readable string representation of an object.

__repr__() returns the official object representation in string format. This can be used to reconstruct the object.

Question 9

What is __eq__()?

Answer 9

Compares two objects using ==

Question 10

What is the purpose of an accessor method?

Answer 10

It is used to access hidden data in the object. If a setter method isn’t used alongside the accessor method, it is known as a read-only attribute.

Question 11

What is the purpose of a mutator method?

Answer 11

It is used to modify the hidden value of an object.