AWS Certified Solutions Architect – Professional — Question 279

A fitness tracking company serves users around the world, with its primary markets in North America and Asia. The company needs to design an infrastructure for its read-heavy user authorization application with the following requirements:
✑ Be resilient to problems with the application in any Region.
✑ Write to a database in a single Region.
✑ Read from multiple Regions.
✑ Support resiliency across application tiers in each Region.
✑ Support the relational database semantics reflected in the application.
Which combination of steps should a solutions architect take? (Choose two.)

Answer options

• A. Use an Amazon Route 53 geoproximity routing policy combined with a multivalue answer routing policy.
• B. Deploy web, application, and MySQL database servers to Amazon EC2 instance in each Region. Set up the application so that reads and writes are local to the Region. Create snapshots of the web, application, and database servers and store the snapshots in an Amazon S3 bucket in both Regions. Set up cross- Region replication for the database layer.
• C. Use an Amazon Route 53 geolocation routing policy combined with a failover routing policy.
• D. Set up web, application, and Amazon RDS for MySQL instances in each Region. Set up the application so that reads are local and writes are partitioned based on the user. Set up a Multi-AZ failover for the web, application, and database servers. Set up cross-Region replication for the database layer.
• E. Set up active-active web and application servers in each Region. Deploy an Amazon Aurora global database with clusters in each Region. Set up the application to use the in-Region Aurora database endpoints. Create snapshots of the web application servers and store them in an Amazon S3 bucket in both Regions.

Correct answer: C, E

Explanation

Using an Amazon Route 53 geolocation routing policy combined with a failover routing policy (Option C) ensures that global users are routed to their nearest Region while providing automatic failover if an entire Region becomes unhealthy. Deploying an Amazon Aurora global database (Option E) natively supports single-Region writes and low-latency, multi-Region reads with relational database semantics, which perfectly matches the application's read-heavy requirements. Other options either introduce unnecessary complexity with manual database partitioning on EC2/RDS or fail to provide automatic geographic failover routing.