Object Oriented Programming Quiz

To pass the quiz, you must correctly answer at least 18 of the 20 questions below. # --quizzes-- ## --quiz-- ### --question-- #### --text-- What serves as the blueprint for creating objects? #### --distractors-- Functions --- Variables --- Loops #### --answer-- Classes ### --question-- #### --text-- Which module does Python use to implement abstract classes? #### --distractors-- `Time` --- `xyz` --- `Random` #### --answer-- `abc` ### --question-- #### --text-- What defines the data and behaviors of an object? #### --distractors-- Functions and classes. --- Variables and loops. --- Seeders and databases. #### --answer-- Attributes and methods. ### --question-- #### --text-- What is single inheritance? #### --distractors-- A child class inheriting attributes and methods from a single function. --- A child class inheriting attributes and methods from multiple functions. --- A child class inheriting attributes and methods from multiple classes. #### --answer-- A child class inheriting attributes and methods from a single class. ### --question-- #### --text-- Which of the following is NOT one of the key principles of object-oriented programming? #### --distractors-- Encapsulation --- Inheritance --- Abstraction #### --answer-- Don't repeat yourself (DRY) ### --question-- #### --text-- What is the difference between prefixing attributes and methods with a double underscore and single underscore? #### --distractors-- Single underscore hides the attribute completely, double underscore makes it readable only inside methods. --- Single underscore means private, double underscore means protected. --- Single underscore makes them public, double underscore makes them static. #### --answer-- Single underscore is just a convention for internal use, double underscore triggers name mangling to prevent accidental attribute and method overriding. ### --question-- #### --text-- Which OOP concept lets you hide complex implementation details and only shows the essential features of an object or system? #### --distractors-- Inheritance --- Polymorphism --- Encapsulation #### --answer-- Abstraction ### --question-- #### --text-- Which decorator do you use to create a setter? #### --distractors-- `@<property_name>.creator` --- `@<method_name>.creater` --- `@<method_name>.creator` #### --answer-- `@<property_name>.setter` ### --question-- #### --text-- Which OOP concept lets you hide the internal state of the object behind a set of public methods and attributes that act like doors? #### --distractors-- Polymorphism --- Abstraction --- Single inheritance #### --answer-- Encapsulation ### --question-- #### --text-- What is a getter? #### --distractors-- A method that updates or changes the value of an attribute. --- A method that deletes an attribute from an object. --- A method that creates a new attribute in an object. #### --answer-- A method that retrieves or returns the value of an attribute. ### --question-- #### --text-- What is a setter? #### --distractors-- A method that retrieves the value of an attribute. --- A method that deletes the value of an attribute. --- A method that deletes an attribute from an object. #### --answer-- A method that sets or updates the value of an attribute. ### --question-- #### --text-- What lets you delete a value you set and get with a setter and getter? #### --distractors-- Remover --- Eraser --- Delayer #### --answer-- Deleter ### --question-- #### --text-- What promotes code reuse, provides clear hierarchies, and allows customization of behavior without rewriting everything? #### --distractors-- DRY --- WET --- Abstraction #### --answer-- Inheritance ### --question-- #### --text-- Which of these is the correct syntax of inheritance? #### --distractors-- ```py class Parent: pass class Child(InheritParent): pass ``` --- ```py class Parent: pass class Child(Inheriter): pass ``` --- ```py class Child: pass class Parent(Parent): pass ``` #### --answer-- ```py class Parent: pass class Child(Parent): pass ``` ### --question-- #### --text-- What connects setters and getters? #### --distractors-- Methods --- Functions --- Classes #### --answer-- Properties ### --question-- #### --text-- What is the process by which Python internally renames an attribute prefixed with a double underscore by adding an underscore and the class name as a prefix? #### --distractors-- Name Mingling --- Polymorphism --- Abstraction #### --answer-- Name Mangling ### --question-- #### --text-- Which function lets you invoke a method from a parent inside a child class? #### --distractors-- `constructor()` --- `__init__()` --- `property()` #### --answer-- `super()` ### --question-- #### --text-- Which of the following statements best describes polymorphism in OOP? #### --distractors-- It allows a class to have multiple constructors with different attributes and methods. --- It allows a class to inherit attributes and methods from another class. --- It allows creating objects with the `class` keyword. #### --answer-- It allows different classes to use the same method name while performing different actions when called. ### --question-- #### --text-- Why does Python mangle the name of an attribute prefixed with double underscores? #### --distractors-- To make the attribute completely private and inaccessible from outside the class. --- To improve performance by storing attributes more efficiently. --- To automatically convert attributes into read-only properties. #### --answer-- To prevent accidental attribute and method overriding in subclasses when using inheritance. ### --question-- #### --text-- Why are properties used instead of methods for getters and setters? #### --distractors-- To make code longer and more explicit. --- To prevent access to the value entirely. --- To automatically log every value change. #### --answer-- To allow direct attribute-like access with dot notation for better readability.