PCPP2 Advanced OOP And Performance Practice Question
You need to ensure that a class can only be instantiated once throughout the application lifecycle. Which design pattern is most appropriate?
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
✓
Singleton Pattern
The Singleton pattern ensures that a class has only one instance and provides a global point of access to it.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Factory Pattern
Why it's wrong here
The Factory pattern is for creating objects without specifying the exact class.
- ✗
Adapter Pattern
Why it's wrong here
Adapter allows incompatible interfaces to work together.
- ✗
Proxy Pattern
Why it's wrong here
Proxy provides a placeholder for another object.
- ✓
Singleton Pattern
Why this is correct
Singleton restricts instantiation to a single object.
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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.