A developer is reviewing code and sees a function defined inside a class. They need to explain to a colleague why this is considered a method. Which explanation is correct?

Because it is defined using the `def` keyword.

Because it is defined inside a class and automatically receives the instance as the first argument.

Because it does not require a `self` parameter.

Because it can be called without creating an instance.

A `BankAccount` class has a `withdraw` method that must check if the balance is sufficient before deducting. The method also needs to call `log_transaction` to record the withdrawal. Which implementation correctly handles both the check and the logging, while ensuring the instance's balance is updated?

def withdraw(self, amount): if self.balance >= amount: self.balance -= amount log_transaction(amount)

def withdraw(self, amount): if self.balance >= amount: balance -= amount self.log_transaction(amount)

def withdraw(self, amount): if self.balance >= amount: self.balance -= amount self.log_transaction(amount)

def withdraw(self, amount): if balance >= amount: self.balance -= amount self.log_transaction(amount)

A `DataProcessor` class has a method `process` that must call `clean_data` and then `analyze_data`, both defined in the same class. The `clean_data` method modifies the instance's `data` attribute. Which code correctly chains these method calls using `self`?

def process(self): clean_data() analyze_data()

def process(self): self.clean_data(self) self.analyze_data(self)

def process(self): self.clean_data() analyze_data()

def process(self): self.clean_data() self.analyze_data()

A developer is debugging a `Rectangle` class where the `area` method returns `self.width * self.height`. However, when they call `rect.area()`, they get a `TypeError: area() takes 0 positional arguments but 1 was given`. What is the most likely cause?

The `area` method is defined outside the class.

The `area` method was defined without a `self` parameter.

The `area` method is being called with an extra argument.

The `width` and `height` attributes are not defined.

A `ShoppingCart` class has a `remove_item` method that must decrease the `item_count` attribute and also call `recalculate_total` to update the total price. Which implementation correctly updates the instance state and calls the other method?

def remove_item(self, item): self.item_count -= 1 self.recalculate_total()

def remove_item(self, item): item_count -= 1 self.recalculate_total()

def remove_item(self, item): item_count -= 1 recalculate_total()

def remove_item(self, item): self.item_count -= 1 recalculate_total()

Python InstitutePCAP - Certified Associate Python Programmer

Domain 4Objective 3

PCAP-31-03 4.3 Equip a Class with Methods 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 52 practice questions to prepare you well beyond it. (estimate)

52questions here

11free pages

6concepts

34%of the exam

Questions 16–20

16application · easy
A developer is reviewing code and sees a function defined inside a class. They need to explain to a colleague why this is considered a method. Which explanation is correct?
Select an answer first
17expert · hard
A `BankAccount` class has a `withdraw` method that must check if the balance is sufficient before deducting. The method also needs to call `log_transaction` to record the withdrawal. Which implementation correctly handles both the check and the logging, while ensuring the instance's balance is updated?
Select an answer first
18expert · hard
A `DataProcessor` class has a method `process` that must call `clean_data` and then `analyze_data`, both defined in the same class. The `clean_data` method modifies the instance's `data` attribute. Which code correctly chains these method calls using `self`?
Select an answer first
19expert · hard
A developer is debugging a `Rectangle` class where the `area` method returns `self.width * self.height`. However, when they call `rect.area()`, they get a `TypeError: area() takes 0 positional arguments but 1 was given`. What is the most likely cause?
Select an answer first
20expert · hard
A `ShoppingCart` class has a `remove_item` method that must decrease the `item_count` attribute and also call `recalculate_total` to update the total price. Which implementation correctly updates the instance state and calls the other method?
Select an answer first

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