A financial services company is designing a new global payment processing system. The system requires a relational database that provides strong consistency, horizontal scalability, and high availability across three continents. Which GCP database service should you recommend?

Answer options:

Cloud SQL for PostgreSQL

Cloud Spanner

Cloud Bigtable

Firestore

How to approach this question

Look for the keywords 'relational', 'global/multi-continent', and 'horizontal scalability'.

Full Answer

B.Cloud Spanner✓ Correct

Cloud Spanner is uniquely designed for this exact use case. It combines the benefits of relational database structure (SQL, schemas, ACID transactions) with non-relational horizontal scale and global distribution.

Common mistakes

Choosing Cloud SQL (A) and assuming read replicas solve the global write scalability requirement.

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Practice the full GCP Professional Cloud Architect Practice Exam 6

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