AWS Certified Cloud Practitioner (CLF-C02)Cloud Technology and ServicesHard
A global e-commerce company needs a fully managed NoSQL database that automatically replicates data across multiple AWS Regions, allowing low-latency reads and writes for customers on different continents while keeping data eventually consistent across all Regions. Which solution meets this requirement?
- AAmazon S3 Cross-Region Replication
- BAmazon DynamoDB Global Tables
- CAmazon RDS Multi-AZ
- DAmazon Aurora Global Database
Show answer & explanationAnswer & explanation
Correct answer: B. Amazon DynamoDB Global Tables
DynamoDB Global Tables provide a fully managed, multi-Region, multi-active database solution that automatically replicates DynamoDB data across chosen AWS Regions, enabling low-latency local reads and writes with eventual consistency across regions.
Why the other options are wrong
- A. S3 Cross-Region Replication applies to object storage, not a NoSQL database service.
- C. RDS Multi-AZ operates within one region for high availability, not multi-region NoSQL replication.
- D. Aurora Global Database is a relational database solution, not NoSQL, though it does support cross-region replication.
DynamoDB Global Tables
A DynamoDB feature that automatically replicates table data across multiple AWS Regions, providing multi-active, low-latency read/write access globally.
- Fully managed multi-region, multi-active replication
- Uses eventual consistency across regions
- Ideal for globally distributed applications needing local low-latency access
Memory trick: Global Tables: one table, copies everywhere, always in sync eventually.