Domain 1.3: Reliability and Resilience

A critical financial application runs on Amazon EC2 instances behind an ALB. The database is Amazon Aurora PostgreSQL. The business requires an RPO of 1 second and an RTO of 1 minute in the event of a complete AWS Region failure. Which disaster recovery strategy meets these requirements?

An application uses Amazon S3 to store millions of images. The company wants to ensure that if objects are accidentally deleted or overwritten in the primary region (us-east-1), they can be recovered from a secondary region (us-west-2). The solution must minimize operational overhead.

A global gaming company uses Amazon Route 53 to route users to the closest AWS Region. They want to ensure that if an entire region goes offline, users are automatically routed to the next closest healthy region. Which routing policy combination achieves this?

An architecture relies on Amazon SQS and AWS Lambda. During peak loads, the downstream API that Lambda calls becomes overwhelmed and throttles requests. The architect needs to ensure no messages are lost and the system recovers gracefully. What should be implemented?

A company wants to test the resilience of their multi-AZ EC2 architecture by intentionally terminating instances and observing system behavior. They want to automate this process safely in production. Which AWS service should they use?

An enterprise is designing a disaster recovery strategy for a critical application running on Amazon EC2 and Amazon Aurora PostgreSQL. The business requires an RPO of 5 minutes and an RTO of 15 minutes. The DR site is in a different AWS Region. Which combination of actions will meet these requirements? (Select THREE)

A global financial institution is designing a multi-region active-active architecture for its core transaction processing system. The system uses Amazon DynamoDB. To prevent split-brain scenarios and ensure strong consistency for critical transactions across regions, which approach should the architect take?

A company is designing a multi-region architecture for a critical API. The API is hosted on Amazon API Gateway and AWS Lambda. The company wants to route users to the region with the lowest latency. If a region fails, traffic must automatically failover to the healthy region. Which combination of services and configurations should be used? (Select TWO)

A company is designing a highly available, multi-region architecture for a web application. The application uses Amazon Route 53, Amazon CloudFront, Application Load Balancers (ALB), and Amazon EC2. The company wants to ensure that if the primary region goes down, traffic is automatically routed to the secondary region. Which combination of configurations should be used? (Select TWO)

A company is designing a disaster recovery strategy for an Amazon Aurora MySQL database. The requirement is an RPO of 1 second and an RTO of 1 minute across different AWS Regions. Which combination of configurations will meet these requirements? (Select TWO)

A company is migrating a large MySQL database to Amazon Aurora MySQL. The application requires high availability and must be able to survive the failure of an entire Availability Zone without manual intervention. How does Aurora meet this requirement?