PCPP1 Advanced Object Oriented Programming Practice Question
What is the purpose of the 'weakref' module in relation to the Observer pattern?
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
✓
To prevent memory leaks.
It allows the subject to maintain references to observers without preventing their collection by the garbage collector.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
To allow private access to observers.
Why it's wrong here
Weakref is about lifecycle management.
- ✗
To ensure thread safety.
Why it's wrong here
Weakref doesn't provide synchronization.
- ✓
To prevent memory leaks.
Why this is correct
Weak references do not increment the reference count, allowing collection.
- ✗
To serialize observers.
Why it's wrong here
Weakref is not for serialization.
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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.