AWS Certified Solutions Architect – Professional — Question 658

A hedge fund company is developing a new web application to handle trades. Traders around the world will use the application. The application will handle hundreds of thousands of transactions, especially during overlapping work hours between Europe and the United States.
According to the company's disaster recovery plan, the data that is generated must be replicated to a second AWS Region. Each transaction item will be less than
100 KB in size. The company wants to simplify the CI/CD pipeline as much as possible.
Which combination of steps will meet these requirements MOST cost-effectively? (Choose two.)

Answer options

Correct answer: A, D

Explanation

Deploying the application in multiple Regions with Route 53 latency-based routing (Option A) ensures global traders experience minimal latency by being directed to the nearest deployment. Because transaction sizes are under 100 KB and the company wants to simplify replication and deployment, Amazon DynamoDB global tables with DynamoDB Accelerator (DAX) (Option D) offer a fully managed, cost-effective, active-active multi-region storage solution. Amazon Aurora multi-master clusters (Option E) do not support multi-region write replication, and Aurora global databases (Option B) operate in an active-passive setup for writes across regions, making them less suitable and more complex to manage for this specific use case.