Design resilient architectures
Practise only this domain. 46 questions with explanations, 20 at a time.
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- A web application runs on Amazon EC2 instances in a single Availability Zone and stores its data in a Single-AZ Amazon RDS for MySQL DB instance. The company wants the application to keep working if that Availability Zone fails. Which two changes meet this requirement? (Choose two.)Easy
- A web application runs on EC2 instances in an Auto Scaling group behind an Application Load Balancer and must stay available if an entire Availability Zone fails. How should the architecture be designed?Easy
- An application consumes messages from a producer tier, and the consumer tier is sometimes temporarily unavailable. During that downtime, messages must not be lost. Which architecture pattern achieves this?Easy
- A production database has an RTO of 4 hours and an RPO of 1 hour. Which disaster recovery strategy is the most cost-effective while meeting both objectives?Medium
- Which AWS service provides point-in-time recovery for DynamoDB tables, allowing restoration to any second within the past 35 days?Easy
- A company wants users routed to the nearest AWS Region by measured latency to minimize response time, while also failing over automatically to a healthy Region if the primary becomes unavailable. Which Route 53 routing policy combination achieves this?Medium
- A startup is building a mobile backend API on AWS and wants the system to absorb sudden bursts of millions of requests with no pre-provisioned servers and no dropped requests. Which architecture is most appropriate?Medium
- A company stores important business data in Amazon EFS. A ransomware attack encrypted all files in the file system, and the company must recover the data as it was before the attack. What provides this recovery capability?Medium
- A company has critical business data on on-premises servers and uses AWS for disaster recovery. When the on-premises site fails, the AWS environment must immediately serve production traffic — even at reduced capacity — with no time spent first starting servers, and without paying for a full-scale second production environment. Which DR strategy fits best?Medium