PCDE Practice Question: Manage a solution that can span multiple database technologies
You are building a global application that requires strong consistency across regions. The application needs to support SQL queries and horizontal scaling. Which database service should you choose?
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
✓
Cloud Spanner
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Cloud Spanner
Why this is correct
Spanner provides global strong consistency, SQL support, and automatic horizontal scaling across regions.
- ✗
Cloud SQL with cross-region replicas
Why it's wrong here
Cloud SQL does not provide strong consistency across regions; replicas are asynchronous.
- ✗
Cloud Bigtable
Why it's wrong here
Bigtable is eventually consistent and does not support SQL.
- ✗
Firestore
Why it's wrong here
Firestore is eventually consistent across regions (multi-region) and does not support SQL.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PCDE practice question is part of Courseiva's free Google Cloud 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 PCDE exam.