AWS Certified Solutions Architect – Associate (SAA-C03) — Question 949

An online gaming company is transitioning user data storage to Amazon DynamoDB to support the company's growing user base. The current architecture includes DynamoDB tables that contain user profiles, achievements, and in-game transactions.

The company needs to design a robust, continuously available, and resilient DynamoDB architecture to maintain a seamless gaming experience for users.

Which solution will meet these requirements MOST cost-effectively?

Answer options

• A. Create DynamoDB tables in a single AWS Region. Use on-demand capacity mode. Use global tables to replicate data across multiple Regions.
• B. Use DynamoDB Accelerator (DAX) to cache frequently accessed data. Deploy tables in a single AWS Region and enable auto scaling. Configure Cross-Region Replication manually to additional Regions.
• C. Create DynamoDB tables in multiple AWS Regions. Use on-demand capacity mode. Use DynamoDB Streams for Cross-Region Replication between Regions.
• D. Use DynamoDB global tables for automatic multi-Region replication. Deploy tables in multiple AWS Regions. Use provisioned capacity mode. Enable auto scaling.

Correct answer: D

Explanation

DynamoDB global tables offer a fully managed, multi-active, multi-Region replication solution that ensures high availability and resilience. For a continuous gaming workload with a predictable baseline, utilizing provisioned capacity mode combined with auto scaling is much more cost-effective than using on-demand capacity. Manual replication setups or custom streams-based replication increase operational complexity and costs compared to the native global tables feature.