This PCAP practice question tests your understanding of modules and packages. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A Python package 'mypackage' contains the following hierarchy:
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Both mypackage/__init__.py and mypackage/subpackage1/__init__.py are executed.
When Python encounters an import statement with a dotted path like `import mypackage.subpackage1.module_a`, it executes the `__init__.py` files for each package in the path in order: first `mypackage/__init__.py`, then `mypackage/subpackage1/__init__.py`. This is because Python must initialize each package before it can access its subpackages or modules. Option D correctly states that both `__init__.py` files are executed.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Only mypackage/__init__.py is executed.
Why it's wrong here
The __init__.py of each package in the path is executed, including subpackage1.
✗
No __init__.py files are executed because the import uses a dotted path.
Why it's wrong here
__init__.py files are executed to initialize packages.
✗
After the import, 'mypackage' is not available as a name in the namespace.
Why it's wrong here
The import makes 'mypackage' available as a name referencing the top-level package.
✓
Both mypackage/__init__.py and mypackage/subpackage1/__init__.py are executed.
Why this is correct
Python executes __init__.py for each package in the dotted path when importing a submodule.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Python Institute often tests the misconception that dotted imports skip `__init__.py` execution or that only the final module is loaded, when in fact Python executes every `__init__.py` along the dotted path to ensure proper package initialization.
Detailed technical explanation
How to think about this question
Under the hood, Python's import system (PEP 302 and later PEP 451) treats each dotted component as a separate attribute lookup on the parent package's `__path__` attribute. The `__init__.py` files are executed as part of the package initialization process, and their code can define `__all__`, import submodules, or run arbitrary setup. A subtle behavior: if a package's `__init__.py` raises an exception, the entire import fails and the package is left in a partially initialized state, which can cause hard-to-debug errors in real-world applications.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Modules and Packages — This question tests Modules and Packages — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Both mypackage/__init__.py and mypackage/subpackage1/__init__.py are executed. — When Python encounters an import statement with a dotted path like `import mypackage.subpackage1.module_a`, it executes the `__init__.py` files for each package in the path in order: first `mypackage/__init__.py`, then `mypackage/subpackage1/__init__.py`. This is because Python must initialize each package before it can access its subpackages or modules. Option D correctly states that both `__init__.py` files are executed.
What should I do if I get this PCAP question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This PCAP 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 PCAP exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.