PCPP1 Advanced Object Oriented Programming Practice Question
How do you define a property in a class to make it read-only?
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
✓
Define a property with only @property, no @setter.
By defining the property with only a getter (using @property) and omitting the setter method.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use the 'readonly' decorator.
Why it's wrong here
This does not exist.
- ✗
Use the 'final' modifier.
Why it's wrong here
This does not exist in Python.
- ✗
Set the attribute to private.
Why it's wrong here
Private attributes are still accessible.
- ✓
Define a property with only @property, no @setter.
Why this is correct
This creates a read-only attribute interface.
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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.