Domain 1.3: Reliability & Resilience

An architect needs to design a highly available database architecture that spans multiple AWS Regions with an RPO of less than 1 second. Which database service natively supports this?

An enterprise is designing a disaster recovery strategy for a critical application. The RTO is 4 hours and the RPO is 1 hour. The application uses EC2 instances and an RDS database. Which DR strategy is the MOST cost-effective while meeting the requirements?

An architecture team is designing a multi-region active-active serverless application using Amazon API Gateway, AWS Lambda, and Amazon DynamoDB. Which TWO configurations are essential to ensure high availability and low latency globally? (Select TWO)

A company is designing a disaster recovery plan for an Amazon RDS for PostgreSQL database. They require an RPO of 5 minutes and an RTO of 30 minutes in a secondary region. Which TWO actions should be part of the solution? (Select TWO)

An architecture team is designing a disaster recovery strategy for an Amazon Aurora database. They need to ensure that if an entire AWS Region goes down, the database can be recovered in a secondary region with zero data loss (RPO = 0). Is this possible with Aurora Global Database?

An application is deployed across multiple AWS Regions. The application uses Amazon DynamoDB Global Tables. Users are routed to the nearest region using Amazon Route 53. During a regional outage, Route 53 automatically routes users to a healthy region. However, users complain that they cannot see data they wrote just seconds before the outage. What is the cause of this?