PCPP2 Advanced OOP And Performance Practice Question
You need to prevent an object's attribute from being modified after it is set. Which approach provides the most robust implementation?
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 a @property decorator with no setter
A property with only a getter (or a custom setter that raises an exception) effectively creates a read-only attribute.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Using a class attribute instead of instance attribute
Why it's wrong here
Class attributes are still mutable unless specifically handled.
- ✓
Using a @property decorator with no setter
Why this is correct
A @property without a @name.setter makes the attribute read-only.
- ✗
Overriding __setattr__ to disallow modification
Why it's wrong here
While possible, @property is the standard Pythonic way.
- ✗
Setting the attribute to private using double underscores
Why it's wrong here
Name mangling does not prevent access or modification.
About these practice questions
One of 194 original PCPP2 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
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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 PCPP2 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 PCPP2 exam.