PCPP-32-101 1.3 Understand and Use Inheritance, Polymorphism, and Composition PCPP-32-1 Practice Questions (Page 1)

Questions 1–5

1. 1application · medium

   A developer is designing a notification system. The system has EmailNotifier and SMSNotifier classes that both have a `send(message)` method. A NotificationManager class needs to use either notifier based on configuration. Which design is most appropriate?

   • ADuplicate the send() logic in NotificationManager.
   • BCreate a single Notifier class with a type attribute to switch behavior.
   • CHave NotificationManager accept a notifier object in its constructor and call its send() method.
   • DMake NotificationManager inherit from both EmailNotifier and SMSNotifier.
   Reveal Solution Discussion Select an answer first
2. 2expert · hard

   A developer is designing a class hierarchy for a game. The classes are: class Animal: pass; class Flying: pass; class Bird(Animal, Flying): pass; class Penguin(Bird): pass. The developer wants to add a `move` method to Flying and Animal. When a Penguin instance calls `move()`, which class's method will be invoked?

   • AAnimal's method
   • BFlying's method
   • CAn error is raised because of conflicting methods
   • DBird's method
   Reveal Solution Discussion Select an answer first
4. 3foundation · easy

   Which statement correctly describes the purpose of a class hierarchy in Python?

   • AIt forces all classes in a program to inherit from a single common base class.
   • BIt prevents a child class from overriding any methods defined in the parent class.
   • CIt allows multiple classes to share the same instance without any inheritance relationship.
   • DIt allows a class to inherit attributes and methods from a parent class, forming a parent-child relationship.
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5. 4foundation · easy

   Which attribute of a class provides its Method Resolution Order as a tuple?

   • A__dict__
   • B__mro__
   • C__class__
   • D__bases__
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6. 5application · medium

   A developer is modeling a vehicle system. The base class Vehicle has a start() method. Car and Motorcycle inherit from Vehicle and override start(). The developer wants to add an ElectricCar class that is a Car but also has a Battery. Which design is most appropriate?

   • AElectricCar inherits from both Car and Battery.
   • BCar inherits from ElectricCar.
   • CElectricCar inherits from Car and contains a Battery instance.
   • DElectricCar contains a Car instance and a Battery instance.
   Reveal Solution Discussion Select an answer first