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Exam AWS Certified Solutions Architect - Associate SAA-C03 All Questions

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Exam AWS Certified Solutions Architect - Associate SAA-C03 topic 1 question 879 discussion

Exam question from Amazon's AWS Certified Solutions Architect - Associate SAA-C03
Question #: 879
Topic #: 1
[All AWS Certified Solutions Architect - Associate SAA-C03 Questions]

A company runs an ecommerce application on AWS. Amazon EC2 instances process purchases and store the purchase details in an Amazon Aurora PostgreSQL DB cluster.

Customers are experiencing application timeouts during times of peak usage. A solutions architect needs to rearchitect the application so that the application can scale to meet peak usage demands.

Which combination of actions will meet these requirements MOST cost-effectively? (Choose two.)

  • A. Configure an Auto Scaling group of new EC2 instances to retry the purchases until the processing is complete. Update the applications to connect to the DB cluster by using Amazon RDS Proxy.
  • B. Configure the application to use an Amazon ElastiCache cluster in front of the Aurora PostgreSQL DB cluster.
  • C. Update the application to send the purchase requests to an Amazon Simple Queue Service (Amazon SQS) queue. Configure an Auto Scaling group of new EC2 instances that read from the SQS queue.
  • D. Configure an AWS Lambda function to retry the ticket purchases until the processing is complete.
  • E. Configure an Amazon AP! Gateway REST API with a usage plan.
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Suggested Answer: AC 🗳️
by Abdullah_Cloud at April 26, 2024, 3:38 a.m.
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sandordini
Highly Voted 9 months, 1 week ago
Selected Answer: AC
A) uses RDS Proxy which is mainly for connection pooling and availability issues. Proxy is for too many connections(, not for performance: read replicas, caching) B is caching which is designed for solving read-issues. (Here we have timeouts, and connection issues.) C: SQS is good method for decoupling.
upvoted 8 times
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Abdullah_Cloud
Highly Voted 9 months, 2 weeks ago
Selected Answer: BC
i think it's BC
upvoted 5 times
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LeonSauveterre
Most Recent 1 month ago
Selected Answer: AC
A - RDS Proxy improves scalability and database connection pooling. B - Only helpful for read-heavy workloads. This question indicates "purchase transactions" (writes), so the main bottleneck is still there. C - SQS allows for better handling of bursts in traffic by queueing requests (which is also true for so many questions before #879). D - Cost-prohibitive at scale due to high invocation rates. And lambda is not suitable for long-running operations like database transactions. E - Irrelevant.
upvoted 2 times
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EllenLiu
1 month, 1 week ago
Selected Answer: AB
why not choose B? C is wired design.
upvoted 1 times
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Cpso
2 months ago
Selected Answer: AB
As a developer choose both A&C is wired? while we use SQS solution to buffer request before handle by EC2 fleet. why we need EC2 in front of SQS from A.? what of thier propose.
upvoted 2 times
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XXXXXlNN
3 months, 3 weeks ago
BC. Not idea why retry helps in this scenario besides it adds more complexity into the current design and also doesn't resolve the avalibility issue...
upvoted 2 times
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b3b5fdd
3 months, 3 weeks ago
Selected Answer: BC
B and C!
upvoted 1 times
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MatAlves
4 months, 2 weeks ago
Selected Answer: BC
A - simply pointless. B- You're already using SQS (C), so why using ec2 to "retry the purchase"? They will stay in the queue until the purchase is processed. Otherwise, they will simply return to the queue. C - This decouples the application from direct database calls, allowing the processing of purchase requests to scale independently and manage load more effectively.
upvoted 1 times
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pujithacg8
5 months, 3 weeks ago
when we have SQS in option C why do you have to retry it again I think the answer is B and C
upvoted 4 times
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EdricHoang
7 months, 3 weeks ago
Selected Answer: AC
Combine SQS and auto-scaling EC2: https://docs.aws.amazon.com/autoscaling/ec2/userguide/as-using-sqs-queue.html
upvoted 3 times
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