Object-oriented programming Quiz

// question 1 of 10

What does it mean for a method to be inherited?

The method is copied into the child class file The method runs twice when called A child class can use the method without redefining it

// question 2 of 10

What is the risk of using a mutable default argument in __init__?

It is shared across all instances that do not pass their own value It prevents the class from being subclassed It raises a TypeError when the object is created

// question 3 of 10

What keyword is used to define a class in Python?

object def class

// question 4 of 10

What is inheritance in OOP?

A class that stores data in a file A method that returns another object A child class reusing attributes and methods from a parent class

// question 5 of 10

What is method resolution in Python?

Python caching method results for performance Python searching for a method starting from the current class up through parent classes Python sorting methods alphabetically before calling

// question 6 of 10

What does setattr(obj, 'name', value) do?

Creates a new method on obj Sets the attribute name to value on obj Raises an error if the attribute already exists

// question 7 of 10

What is the correct way to check if an object is an instance of multiple classes?

obj.type in [ClassA, ClassB] isinstance(obj, (ClassA, ClassB)) type(obj) == ClassA or ClassB

// question 8 of 10

What is a data class in Python?

A class decorated with @dataclass that auto-generates __init__ and __repr__ A class that only stores data with no methods A class that inherits from dict

// question 9 of 10

What is an object in OOP?

A variable that holds a list An instance of a class A function that returns data

// question 10 of 10

What is a property setter?

A method that returns the value of a private attribute A method decorated with @attr.setter that validates before setting an attribute A class attribute that cannot be changed

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