PCPP2 Design Patterns Practice Question
When implementing the Strategy pattern, what is the best way to inject the strategy into the context object?
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
✓
Pass the strategy instance to the context's constructor
Dependency injection, usually via the constructor, allows the context to remain agnostic of the specific strategy implementation.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Pass the strategy instance to the context's constructor
Why this is correct
Constructor injection is a standard way to provide the required strategy implementation.
- ✗
Use a global variable for the strategy
Why it's wrong here
Global state makes the code harder to test and maintain.
- ✗
Import the strategy module inside the context's run method
Why it's wrong here
This is inefficient and hides dependencies.
- ✗
Hardcode the strategy class inside the context's __init__ method
Why it's wrong here
This creates tight coupling and violates the strategy pattern intent.
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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.