SAA-C03 · Question #429
SAA-C03 Question #429: Real Exam Question with Answer & Explanation
The correct answer is A: Place the EC2 instances in Auto Scaling groups to scale appropriately during peak usage hours.. This question centers on improving scalability and global access performance. Auto Scaling groups enable EC2 instances to scale dynamically in response to demand, ensuring availability during peak hours without manual intervention. Amazon RDS read replicas offload read traffic, i
Question
A company needs to accommodate traffic for a web application that the company hosts on AWS, especially during peak usage hours. The application uses Amazon EC2 instances as web servers, an Amazon RDS DB instance for database operations, and an Amazon S3 bucket to store transaction documents. The application struggles to scale effectively and experiences performance issues. The company wants to improve the scalability of the application and prevent future performance issues. The company also wants to improve global access speeds to the transaction documents for the company's global users. Which solution will meet these requirements?
Options
- APlace the EC2 instances in Auto Scaling groups to scale appropriately during peak usage hours.
- BIncrease the size of the EC2 instances to provide more compute capacity. Use Amazon
- CTransition workloads from the EC2 instances to AWS Lambda functions to scale in response to
- DConvert the application architecture to use Amazon Elastic Container Service (Amazon ECS)
Explanation
This question centers on improving scalability and global access performance. Auto Scaling groups enable EC2 instances to scale dynamically in response to demand, ensuring availability during peak hours without manual intervention. Amazon RDS read replicas offload read traffic, improving read throughput and reducing latency on the primary database instance. Deploying Amazon CloudFront with S3 as origin accelerates delivery of static transaction documents globally by caching content at edge locations, reducing latency for users worldwide. Option B focuses on vertical scaling (larger instances) and caching with ElastiCache, but it does not address global content delivery optimally. AWS Global Accelerator accelerates network traffic but is better suited for accelerating TCP and UDP traffic; CloudFront is generally preferred for HTTP content delivery. Option C migrates workloads to Lambda and Aurora global databases, which is an advanced and potentially costly redesign that may not be necessary. Option D suggests moving to ECS and multi-AZ RDS but does not address global content delivery efficiently. Therefore, option A uses proven scalability and caching best practices aligned with AWS Well- Architected Framework pillars for performance and operational excellence.
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