Answer-first summary for fast verification
Answer: Cloud Spanner
**Correct Answer: C (Cloud Spanner)** - **A (Firestore)** is incorrect because it is a NoSQL document database, not a relational database. It offers flexibility and scalability but lacks the strong consistency and global replication needed for this scenario. - **B (Cloud SQL)** is incorrect as it does not inherently support global availability. It's a traditional relational database service without built-in multi-region replication, potentially leading to higher latency. - **C (Cloud Spanner)** is correct because it is a fully managed relational database that provides unlimited scale, strong consistency, and 99.999% availability. It ensures users worldwide see the exact same data with minimal latency by automatically replicating data across multiple regions. - **D (Cloud Bigtable)** is incorrect as it is a NoSQL database offering eventual consistency, not suitable for applications requiring strong consistency and global data uniformity. Cloud Spanner is designed for mission-critical applications requiring transactional consistency at a global scale, making it the optimal choice for this forex trading application.
Author: LeetQuiz Editorial Team
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You are developing a forex trading application aimed at traders worldwide. The application requires a relational database structure to ensure all users globally see the exact same data. It will be deployed across multiple regions to serve users globally with minimal latency. Which storage option should you choose?
A
Firestore
B
Cloud SQL
C
Cloud Spanner
D
Cloud Bigtable
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