Google PCA Practice Question: Analysing and Optimising Technical and Business Processes
A company running a globally distributed application uses Firestore in Native mode. They need strong consistency for reads and writes across multiple regions. Which deployment strategy should they use?
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
✓
Use Cloud Spanner
Firestore supports multi-region replication but only provides eventual consistency across regions. Cloud Spanner offers strong consistency globally. Firestore in Datastore mode also offers eventual consistency. Therefore, for strong consistency across regions, Cloud Spanner is required.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use Bigtable with replication
Why it's wrong here
Bigtable provides eventual consistency across clusters. It does not offer strong consistency for multi-region deployments.
- ✗
Use Firestore in Datastore mode
Why it's wrong here
Datastore mode also provides eventual consistency across regions.
- ✗
Use Firestore in multi-region (nam5 or eur3)
Why it's wrong here
Firestore multi-region provides eventual consistency, not strong consistency.
- ✓
Use Cloud Spanner
Why this is correct
Cloud Spanner provides strong ACID transactions across regions, meeting the requirement for strong consistency.
Go deeper
Related to this question
Learn chapter
Introduction to Google Cloud Platform
Key term
Firestore
Firestore is a flexible, scalable, serverless NoSQL database from Google Cloud that automatically syncs data across applications in real time.
Key term
Spanner
Google Cloud's globally distributed, strongly consistent, and horizontally scalable database service designed for mission-critical, transactional workloads.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PCA 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 PCA exam.