PCPP1 Advanced Object Oriented Programming Practice Question
How do you correctly call a method from a sibling class in a diamond inheritance structure using super()?
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
✓
Use super() in each class to delegate to the next class in the MRO.
super() follows the Method Resolution Order (MRO), which correctly handles diamond inheritance by delegating calls to the next class in the chain, not just the parent.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Call the grandparent class directly.
Why it's wrong here
This creates fragile code that breaks if the hierarchy changes.
- ✓
Use super() in each class to delegate to the next class in the MRO.
Why this is correct
super() ensures that each class in the MRO is initialized exactly once.
- ✗
Use the __bases__ attribute to iterate through parents.
Why it's wrong here
This is manual and error-prone compared to super().
- ✗
Explicitly call the sibling class method by name.
Why it's wrong here
This bypasses the MRO and can lead to unexpected behavior.
About these practice questions
One of 209 original PCPP1 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 →
JA
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.