AWS Certified Database – Specialty — Question 346

A global company is developing an application across multiple AWS Regions. The company needs a database solution with low latency in each Region and automatic disaster recovery. The database must be deployed in an active-active configuration with automatic data synchronization between Regions.
Which solution will meet these requirements with the LOWEST latency?

Answer options

• A. Amazon RDS with cross-Region read replicas
• B. Amazon DynamoDB global tables
• C. Amazon Aurora global database
• D. Amazon Athena and Amazon S3 with S3 Cross Region Replication

Correct answer: B

Explanation

Amazon DynamoDB global tables provide a fully managed, multi-Region, active-active database solution that delivers single-digit millisecond latency for both read and write operations in all configured Regions. In contrast, Amazon Aurora global database and Amazon RDS with cross-Region replicas operate in an active-passive configuration where writes must go to a single primary Region. Amazon Athena with Amazon S3 is an analytics tool rather than a low-latency, active-active transactional database.