Exam AWS Certified Solutions Architect - Associate SAA-C02 All Questions

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Exam AWS Certified Solutions Architect - Associate SAA-C02 topic 1 question 298 discussion

Exam question from Amazon's AWS Certified Solutions Architect - Associate SAA-C02

Question #: 298
Topic #: 1

[All AWS Certified Solutions Architect - Associate SAA-C02 Questions]

A company wants to move a multi-tiered application from on premises to the AWS Cloud to improve the application's performance. The application consists of application tiers that communicate with each other by way of RESTful services. Transactions are dropped when one tier becomes overloaded. A solutions architect must design a solution that resolves these issues and modernizes the application.
Which solution meets these requirements and is the MOST operationally efficient?

A. Use Amazon API Gateway and direct transactions to the AWS Lambda functions as the application layer. Use Amazon Simple Queue Service (Amazon SQS) as the communication layer between application services.
B. Use Amazon CloudWatch metrics to analyze the application performance history to determine the server's peak utilization during the performance failures. Increase the size of the application server's Amazon EC2 instances to meet the peak requirements.
C. Use Amazon Simple Notification Service (Amazon SNS) to handle the messaging between application servers running on Amazon EC2 in an Auto Scaling group. Use Amazon CloudWatch to monitor the SNS queue length and scale up and down as required.
D. Use Amazon Simple Queue Service (Amazon SQS) to handle the messaging between application servers running on Amazon EC2 in an Auto Scaling group. Use Amazon CloudWatch to monitor the SQS queue length and scale up when communication failures are detected.

Show Suggested Answer

Suggested Answer: A 🗳️

by toto059 at Feb. 2, 2021, 12:59 p.m.

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CountryGent

Highly Voted 3 years, 9 months ago

I think it's A as it both decouples (modernizes) the application using SQS, and provides scalability through Lambda.

upvoted 83 times

CCNPWILL

3 years, 9 months ago

Nice work country man. Answer is indeed A. It modernizes the app. choice D fails to do so.

upvoted 24 times

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syu31svc

Highly Voted 3 years, 9 months ago

I would take A "RESTful services" -> API gateway to be used

upvoted 16 times

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Aelaz

Most Recent 1 year, 7 months ago

I think it s A because we do not need SQS since api gateway with lamnda will do the required job.

upvoted 1 times

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[Removed]

2 years, 4 months ago

chatgpt is suggesting the option D though and mentioning the reason that in case of option A it wont be able to deal with the message being dropped.

upvoted 1 times

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NikaCZ

2 years, 7 months ago

Selected Answer: A

My opinion is A.

upvoted 1 times

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Jobair

2 years, 8 months ago

Selected Answer: D

My 2 cents The application consists of application tiers that communicate with each other by way of RESTful services. If API Gateway is triggering lambda why will you need SQS for the application layer? D sounds reasonable

upvoted 1 times

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AWSequalsPromotion

3 years, 5 months ago

Selected Answer: A

think it's A as it both decouples (modernizes) the application using SQS, and provides scalability through Lambda.

upvoted 3 times

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FF11

3 years, 6 months ago

Selected Answer: A

A seems correct.

upvoted 2 times

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banjojoe

3 years, 8 months ago

key phrase for me is "modernizes the application" - that means we're updating how the entire application works (d) is still running on ec2 instances and isn't modern; we don't even know if the app can be scaled horizontally (c) just no, SNS doesn't send or receive messages like that (b) could work but a lot of effort and still using (old school) ec2 instances (a) works, is modern, scalable, value for money, must be answer

upvoted 5 times

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khankwtkwt

3 years, 8 months ago

Why not C.... As per my understanding SQS is a queue service and its not something to use for communication between services.

upvoted 1 times

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ecastilla

3 years, 8 months ago

Why A is not correct in my opinion: you don't need SQS, because API Gateway and Lambda scales enough, particularly if you come from an on-premise environment as is the case

upvoted 1 times

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Cotter

3 years, 8 months ago

I think D SQS.

upvoted 4 times

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Kenisworld666

3 years, 8 months ago

DDDDDDDDDDDDD 100% sure

upvoted 3 times

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Kasei

3 years, 8 months ago

If you use a target tracking scaling policy based on a custom Amazon SQS queue metric, dynamic scaling can adjust to the demand curve of your application more effectively. For more information about choosing metrics for target tracking, see Choosing metrics.

upvoted 1 times

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jkwek

3 years, 8 months ago

Answer is A. Refer url: https://aws.amazon.com/getting-started/hands-on/build-serverless-web-app-lambda-apigateway-s3-dynamodb-cognito/module-4/ Build a Serverless Web Application with AWS Lambda, Amazon API Gateway, AWS Amplify, Amazon DynamoDB, and Amazon Cognito. This example showed similar setup as question: Build a Serverless Web Application with AWS Lambda, Amazon API Gateway, AWS Amplify, Amazon DynamoDB, and Amazon Cognito

upvoted 3 times

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zxing233

3 years, 8 months ago

reprogram all your application to run in LAMBDA is called "operationally efficient"?

upvoted 1 times

banjojoe

3 years, 8 months ago

for me "operationally efficient" means the least ammount of work the infrastructure team has to do to run it, nothing to do with the developers who have to code it

upvoted 3 times

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jealbave

3 years, 8 months ago

A or D

upvoted 4 times

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