Exercise: Polymorphism

Questions for: Polymorphism

In Python, what is the purpose of the __contains__() method?
A:
To define class attributes
B:
To customize the behavior when an item is checked for membership using the in keyword
C:
To create a new instance of the class
D:
To customize the behavior when an instance is compared using the == operator
Answer: B
The __contains__() method is used to customize the behavior when an item is checked for membership using the in keyword, allowing for polymorphic behavior.
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What is the purpose of the __floordiv__() method in Python classes in the context of polymorphism?
A:
To customize the behavior when an instance is divided using floor division by another instance
B:
To create a new instance of the class
C:
To define class attributes
D:
To customize the behavior when an item is accessed using square brackets on an instance
Answer: A
The __floordiv__() method is used to customize the behavior when an instance is divided using floor division by another instance, allowing for polymorphic behavior.
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Which of the following is an example of polymorphism through function overriding?
A:
Defining a function with the same name but different parameters in a module
B:
Defining a function with the same name but different return types in a module
C:
Defining a function with the same name in a module
D:
Defining a function with different access modifiers in a module
Answer: C
Polymorphism through function overriding in Python involves defining a function with the same name in a module, where a subclass provides a specific implementation for the function.
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How does Python achieve polymorphism through "parametric polymorphism"?
A:
By explicitly specifying data types for objects
B:
By using static typing to enforce object compatibility
C:
By allowing objects to take on multiple forms based on their behavior
D:
By defining functions or classes that can operate on different data types
Answer: D
"Parametric polymorphism" in Python refers to defining functions or classes that can operate on different data types, contributing to polymorphic behavior.
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Consider the following code: 
class Guitar:
    def play(self):
        pass

class ElectricGuitar(Guitar):
    def play(self):
        return "Distorted sound!"

class AcousticGuitar(Guitar):
    def play(self):
        return "Harmonious sound!"
What concept is demonstrated in this code?
A:
Method overloading
B:
Method overriding
C:
Operator overloading
D:
Polymorphism
Answer: B
This code demonstrates method overriding, where the subclasses provide specific implementations for a method defined in the superclass.
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