A developer is creating a `Vector` class. They want the constructor to accept either two numbers (x, y) or a single tuple containing two numbers. Which constructor implementation handles both cases?

def __init__(self, x, y=None): if y is None: self.x, self.y = x else: self.x, self.y = x, y

def __init__(self, *args): if len(args) == 1: self.x, self.y = args[0] else: self.x, self.y = args

def __init__(self, x, y=None): if y is None: self.x = x[0] self.y = x[1] else: self.x = x self.y = y

def __init__(self, x, y): self.x, self.y = x, y

A team defines a simple `Point` class with no `__init__` method. They then write `p = Point()`. What happens?

A `Point` instance is created, but `__init__` is called with no arguments and raises a TypeError.

A `Point` instance is created, and `p` has no instance attributes until they are assigned later.

A `Point` instance is created with default attributes `x=0` and `y=0`.

An error occurs because `Point()` requires at least one argument.

A car rental system needs a `Car` class where each car is created with a license plate and a daily rate. The constructor should allow creating a car with `Car('ABC-123', 45)`. Which constructor signature is correct?

def __init__(self, plate, rate):

def __init__(self, plate, rate=0):

A developer is writing a `Book` class and wants to ensure that every book object has a `title` and an `author` attribute. Which code snippet correctly declares the constructor?

def __init__(self): self.title = 'Unknown' self.author = 'Unknown'

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

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

def __init__(self, title): self.title = title self.author = 'Unknown'

Python InstitutePCAP - Certified Associate Python Programmer

Domain 4Objective 6

PCAP-31-03 4.6 Construct and Initialize Objects PCAP-31 Practice Questions (Page 9)

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 48 practice questions to prepare you well beyond it. (estimate)

48questions here

10free pages

5concepts

34%of the exam

Questions 41–45

41expert · hard
A developer is creating a `Vector` class. They want the constructor to accept either two numbers (x, y) or a single tuple containing two numbers. Which constructor implementation handles both cases?
Select an answer first
42application · easy
In a `BankAccount` class, the constructor is `def __init__(self, owner, balance=0):`. Inside the constructor, which line correctly sets the `owner` attribute on the newly created instance?
Select an answer first
43application · easy
A team defines a simple `Point` class with no `__init__` method. They then write `p = Point()`. What happens?
Select an answer first
44application · medium
A car rental system needs a `Car` class where each car is created with a license plate and a daily rate. The constructor should allow creating a car with `Car('ABC-123', 45)`. Which constructor signature is correct?
Select an answer first
45application · easy
A developer is writing a `Book` class and wants to ensure that every book object has a `title` and an `author` attribute. Which code snippet correctly declares the constructor?
Select an answer first

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PCAP-31-03 4.6 Construct and Initialize Objects PCAP-31 Practice Questions (Page 9)

Questions 41–45

A developer is creating a `Vector` class. They want the constructor to accept either two numbers (x, y) or a single tuple containing two numbers. Which constructor implementation handles both cases?

In a `BankAccount` class, the constructor is `def init(self, owner, balance=0):`. Inside the constructor, which line correctly sets the `owner` attribute on the newly created instance?

A team defines a simple `Point` class with no `init` method. They then write `p = Point()`. What happens?

A car rental system needs a `Car` class where each car is created with a license plate and a daily rate. The constructor should allow creating a car with `Car('ABC-123', 45)`. Which constructor signature is correct?

A developer is writing a `Book` class and wants to ensure that every book object has a `title` and an `author` attribute. Which code snippet correctly declares the constructor?

PCAP-31-03 4.6 Construct and Initialize Objects PCAP-31 Practice Questions (Page 9)

Questions 41–45

A developer is creating a `Vector` class. They want the constructor to accept either two numbers (x, y) or a single tuple containing two numbers. Which constructor implementation handles both cases?

In a `BankAccount` class, the constructor is `def __init__(self, owner, balance=0):`. Inside the constructor, which line correctly sets the `owner` attribute on the newly created instance?

A team defines a simple `Point` class with no `__init__` method. They then write `p = Point()`. What happens?

A car rental system needs a `Car` class where each car is created with a license plate and a daily rate. The constructor should allow creating a car with `Car('ABC-123', 45)`. Which constructor signature is correct?

A developer is writing a `Book` class and wants to ensure that every book object has a `title` and an `author` attribute. Which code snippet correctly declares the constructor?

Keep studying — Object-Oriented Programming

In a `BankAccount` class, the constructor is `def init(self, owner, balance=0):`. Inside the constructor, which line correctly sets the `owner` attribute on the newly created instance?

A team defines a simple `Point` class with no `init` method. They then write `p = Point()`. What happens?