{
    "359_A": "The selected answer (A. Migrate the database to Amazon DynamoDB global tables and configure automatic failover between AWS Regions using Amazon Route 53 health checks) is incorrect for the scenario described. \n\nAmazon DynamoDB is a fully managed, serverless, NoSQL database service provided by AWS, and it is not a direct replacement for a stateful relational database like Amazon RDS. In the given scenario, the application requires a stateful database, which typically involves complex relationships between data entities that are better suited for a relational database like Amazon RDS.\n\nBy migrating to Amazon DynamoDB global tables, the DevOps engineer would be changing the database technology from a relational database to a NoSQL database, which might not be a suitable solution for the existing application's data model and requirements. Additionally, configuring automatic failover between AWS Regions using Route 53 health checks is not directly related to ensuring high availability within a single region for the existing RDS instance.\n\nThe correct answer in this scenario is option D. Modify the RDS DB instance to be a Multi-AZ deployment and verify automatic failover to the standby instance if the primary instance becomes unavailable. Multi-AZ deployment in Amazon RDS provides high availability and durability for database instances by replicating data to a standby instance in a different Availability Zone. If the primary database instance fails, Amazon RDS automatically fails over to the standby instance to minimize downtime and ensure data availability."
}