PCPP2 Advanced OOP And Performance Practice Question
You want to store an object in a set. What must the object implement?
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
✓
__hash__ and __eq__
To be hashable (and thus stored in a set), an object must implement __hash__ and have equality defined via __eq__.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
__iter__
Why it's wrong here
__iter__ makes an object iterable, not hashable.
- ✓
__hash__ and __eq__
Why this is correct
These are the requirements for an object to be hashable.
- ✗
__set__
Why it's wrong here
__set__ is for descriptors.
- ✗
__init__ only
Why it's wrong here
All objects have __init__, but not all are hashable.
About these practice questions
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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 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.