PCPP2 Database Access Practice Question
When configuring a connection pool in SQLAlchemy, what does the 'pool_size' parameter define?
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
✓
Number of persistent connections kept in the pool.
pool_size defines the number of persistent connections to keep open in the pool.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The number of retries before failure.
Why it's wrong here
Retries are handled by the driver, not the pool size.
- ✗
The timeout duration for queries.
Why it's wrong here
This is controlled by pool_timeout.
- ✓
Number of persistent connections kept in the pool.
Why this is correct
pool_size controls the connection pool capacity.
- ✗
Maximum number of simultaneous sessions.
Why it's wrong here
Sessions are ORM concepts, not DB connections.
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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 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.