PCPP1 Best Practices And Coding Conventions Practice Question
When designing a public API, how should you signal that a method is for internal use only?
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
✓
By prepending a single underscore.
Prefixing a name with a single underscore is the conventional way to indicate internal use.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
By prepending a single underscore.
Why this is correct
This is the established convention in Python.
- ✗
By raising a warning if called externally.
Why it's wrong here
This is intrusive and breaks the user experience.
- ✗
By adding a comment like '# INTERNAL'.
Why it's wrong here
Code conventions should be enforced by structure, not just comments.
- ✗
By using all caps.
Why it's wrong here
All caps are for constants.
- ✗
By suffixing with an underscore.
Why it's wrong here
Suffixing with an underscore is used to avoid conflict with reserved keywords.
About these practice questions
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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.