PCPP1 Advanced Object Oriented Programming Practice Question
When designing a class hierarchy, what is the best way to prevent a method from being overridden by subclasses?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Using the @final decorator from typing.
Python does not have a native 'final' keyword, but naming conventions (e.g., __method) or raising errors in the subclass can be used, though it is often discouraged in favor of clear documentation.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Defining it as a private method.
Why it's wrong here
Private methods can still be overridden in subclasses.
- ✗
Defining it as a static method.
Why it's wrong here
Static methods can be overridden.
- ✓
Using the @final decorator from typing.
Why this is correct
The @final decorator is the standard way to indicate that a method should not be overridden.
- ✗
Using the 'final' keyword.
Why it's wrong here
Python does not have a 'final' keyword.
About these practice questions
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Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Python Institute exam blueprint
This PCPP1 practice question is part of Courseiva's free Python Institute certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PCPP1 exam.