Object-oriented programming Quiz

// question 1 of 10

What is operator overloading?

Using the same operator in multiple expressions Defining special methods to give operators custom behavior for a class Calling an operator method directly

// question 2 of 10

What is the single responsibility principle?

Each file should contain only one class Each class should have one clear purpose Each method should take only one argument

// question 3 of 10

What is a data class in Python?

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

// question 4 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 5 of 10

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

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

// question 6 of 10

What happens when you assign a value to a class attribute through an instance?

A TypeError is raised The class attribute is modified for all instances A new instance attribute is created that shadows the class attribute

// question 7 of 10

What is the output of Animal.count when count is a class attribute set to zero?

None 0 for all instances that have not overridden it An AttributeError because count is not on an instance

// question 8 of 10

What happens if you forget to write self.name equals name in __init__?

The attribute is stored on the class instead The program raises a NameError immediately The value is stored as a local variable and lost after __init__ finishes

// question 9 of 10

What is an instance attribute?

An attribute shared by all objects of the class An attribute unique to each individual object An attribute defined outside __init__

// question 10 of 10

What is method overriding?

Defining two methods with the same name in one class A child class redefining a method from the parent class Calling a method with different arguments

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