PCPP2 Database Access Practice Question
In SQLAlchemy, how do you prevent an object from being saved to the database during a session.commit()?
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
✓
session.expunge(obj)
You can use session.expunge(obj) to remove the object from the session's management.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
session.delete(obj)
Why it's wrong here
This would mark the object for deletion, not removal from session.
- ✗
session.detach(obj)
Why it's wrong here
detach is not a valid method name on the session.
- ✗
session.rollback()
Why it's wrong here
This rolls back the entire transaction.
- ✓
session.expunge(obj)
Why this is correct
expunge removes the object from the session's persistence management.
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JA
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 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.