A developer needs to model a library system. Each book should have a title, author, and a method to display its info. Which class definition correctly creates a Book object and allows calling display_info()?

book = Book("Moby Dick", "Melville") book.display_info()

class Book: def __init__(self, title, author): self.title = title self.author = author def display_info(self): return f"{self.title} by {self.author}"

class Book: def display_info(self): return "Title by Author"

class Book: def __init__(self, title, author): self.title = title self.author = author

A developer is building a user authentication system. The password should not be readable from outside the class. Which approach best achieves this?

Store the password in a public attribute and hope no one reads it.

Store the password in a private attribute __password and provide a method check_password() that compares a given string.

Store the password in a class attribute.

Store the password in a global variable.

A developer is extending a class hierarchy. The base class Vehicle has a method start() that prints "Engine started". The subclass ElectricCar overrides start() to print "Motor started". However, the developer also wants to log the base class action. Which code correctly logs the base class action and then overrides the behavior?

def start(self): print(super().start())

def start(self): print("Motor started")

def start(self): super().start() print("Motor started")

def start(self): return super().start()

A developer has a class A with a method greet() that returns "Hello". Class B inherits from A and overrides greet() to return "Hi". Class C inherits from B and does not override greet(). What does c.greet() return?

An error because C doesn't define greet()

Python InstitutePCAP - Certified Associate Python Programmer

Domain 4Objective 1

PCAP-31-03 4.1 Understand the Object-Oriented Approach PCAP-31 Practice Questions (Page 4)

Part of the Object-Oriented Programming domain, which accounts for 34% of the PCAP-31 exam. Python Institute does not publish an official question count, but from its 65-minute exam (~25–45 total, ~9–15 in this domain), expect 2–3 from this objective — we provide 51 practice questions to prepare you well beyond it. (estimate)

51questions here

11free pages

7concepts

34%of the exam

Questions 16–20

16application · easy
A developer needs to model a library system. Each book should have a title, author, and a method to display its info. Which class definition correctly creates a Book object and allows calling display_info()?
Select an answer first
17application · medium
A developer is building a user authentication system. The password should not be readable from outside the class. Which approach best achieves this?
Select an answer first
18expert · hard
A developer is extending a class hierarchy. The base class Vehicle has a method start() that prints "Engine started". The subclass ElectricCar overrides start() to print "Motor started". However, the developer also wants to log the base class action. Which code correctly logs the base class action and then overrides the behavior?
Select an answer first
19expert · hard
A developer is debugging a class where an attribute is not accessible from outside. The class defines self.__data. The developer tries to access obj.__data and gets an AttributeError. What is the correct way to access this attribute from outside the class?
Select an answer first
20expert · medium
A developer has a class A with a method greet() that returns "Hello". Class B inherits from A and overrides greet() to return "Hi". Class C inherits from B and does not override greet(). What does c.greet() return?
Select an answer first

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PCAP-31-03 4.1 Understand the Object-Oriented Approach PCAP-31 Practice Questions (Page 4)

Questions 16–20

A developer needs to model a library system. Each book should have a title, author, and a method to display its info. Which class definition correctly creates a Book object and allows calling display_info()?

A developer is building a user authentication system. The password should not be readable from outside the class. Which approach best achieves this?

A developer is debugging a class where an attribute is not accessible from outside. The class defines self.__data. The developer tries to access obj.__data and gets an AttributeError. What is the correct way to access this attribute from outside the class?

A developer has a class A with a method greet() that returns "Hello". Class B inherits from A and overrides greet() to return "Hi". Class C inherits from B and does not override greet(). What does c.greet() return?

Keep studying — Object-Oriented Programming

A developer is debugging a class where an attribute is not accessible from outside. The class defines self.data. The developer tries to access obj.data and gets an AttributeError. What is the correct way to access this attribute from outside the class?