ExpertEasy1 markMultiple Choice
GCP PCA · Question 21 · Technical Requirements
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?
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:
A.
Cloud SQL for PostgreSQL
B.
Cloud Spanner
C.
Cloud Bigtable
D.
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
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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