Consider the following custom exception class: class ConfigError(Exception): def __init__(self, key, message): self.key = key self.message = message What does the __init__ method accomplish in this class?

It prevents the exception from being caught by a try-except block

It automatically raises the exception when called

It stores the key and message as attributes on the exception instance

It converts the exception into a string representation

Which code snippet correctly defines a custom exception class named ValidationError?

class ValidationError(BaseException): pass

def ValidationError(Exception): pass

class ValidationError(Exception): pass

A developer is building a library that validates user input for a configuration file. They need to raise a specific error when a required key is missing, but they also want code that catches any configuration-related problem to work. Which class definition should they use?

class ConfigError(BaseException): pass

class ConfigError(Exception): pass

class ConfigError(ValueError, TypeError): pass

A developer is writing a custom exception for a payment gateway. They want the exception to be catchable by a generic except Exception handler, but also want to be able to catch it specifically. Which class definition is appropriate?

class PaymentError(KeyboardInterrupt): pass

class PaymentError(Exception): pass

class PaymentError(BaseException): pass

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Domain 2Objective 2

PCAP-31-03 2.2 Extend the Exceptions Hierarchy with Self-Defined Exceptions PCAP-31 Practice Questions (Page 2)

Part of the Exceptions domain, which accounts for 14% of the PCAP-31 exam. Python Institute does not publish an official question count, but from its 65-minute exam (~25–45 total, ~4–6 in this domain), expect 2–3 from this objective — we provide 12 practice questions to prepare you well beyond it. (estimate)

12questions here

3free pages

6concepts

14%of the exam

Questions 6–10

6foundation · easy
Consider the following custom exception class: class ConfigError(Exception): def __init__(self, key, message): self.key = key self.message = message What does the __init__ method accomplish in this class?
Select an answer first
7foundation · easy
Which code snippet correctly defines a custom exception class named ValidationError?
Select an answer first
8application · medium
A developer is building a library that validates user input for a configuration file. They need to raise a specific error when a required key is missing, but they also want code that catches any configuration-related problem to work. Which class definition should they use?
Select an answer first
9application · easy
A developer is designing an exception hierarchy for a network library. They have a base NetworkError and subclasses ConnectionError and TimeoutError. A function raises TimeoutError. Which except clause will catch it but NOT ConnectionError?
Select an answer first
10application · easy
A developer is writing a custom exception for a payment gateway. They want the exception to be catchable by a generic except Exception handler, but also want to be able to catch it specifically. Which class definition is appropriate?
Select an answer first

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PCAP-31-03 2.2 Extend the Exceptions Hierarchy with Self-Defined Exceptions PCAP-31 Practice Questions (Page 2)

Questions 6–10

Consider the following custom exception class: class ConfigError(Exception): def __init__(self, key, message): self.key = key self.message = message What does the __init__ method accomplish in this class?

Which code snippet correctly defines a custom exception class named ValidationError?

A developer is building a library that validates user input for a configuration file. They need to raise a specific error when a required key is missing, but they also want code that catches any configuration-related problem to work. Which class definition should they use?

A developer is designing an exception hierarchy for a network library. They have a base NetworkError and subclasses ConnectionError and TimeoutError. A function raises TimeoutError. Which except clause will catch it but NOT ConnectionError?

A developer is writing a custom exception for a payment gateway. They want the exception to be catchable by a generic except Exception handler, but also want to be able to catch it specifically. Which class definition is appropriate?

Keep studying — Exceptions

Consider the following custom exception class: class ConfigError(Exception): def init(self, key, message): self.key = key self.message = message What does the init method accomplish in this class?