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 522 discussion

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

Question #: 522
Topic #: 1

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

A company is hosting a three-tier ecommerce application in the AWS Cloud. The company hosts the website on Amazon S3 and integrates the website with an
API that handles sales requests. The company hosts the API on three Amazon EC2 instances behind an Application Load Balancer (ALB). The API consists of static and dynamic front-end content along with backend workers that process sales requests asynchronously.
The company is expecting a significant and sudden increase in the number of sales requests during events for the launch of new products.
What should a solutions architect recommend to ensure that all the requests are processed successfully?

A. Add an Amazon CloudFront distribution for the dynamic content. Increase the number of EC2 instances to handle the increase in traffic.
B. Add an Amazon CloudFront distribution for the static content. Place the EC2 instances in an Auto Scaling group to launch new instances based on network traffic.
C. Add an Amazon CloudFront distribution for the dynamic content. Add an Amazon ElastiCache instance in front of the ALB to reduce traffic for the API to handle.
D. Add an Amazon CloudFront distribution for the static content. Add an Amazon Simple Queue Service (Amazon SQS) queue to receive requests from the website for later processing by the EC2 instances.

Show Suggested Answer

Suggested Answer: D 🗳️

by pikaflash at Dec. 14, 2021, 1:58 p.m.

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Robert_B

Highly Voted 3 years, 4 months ago

D - CORRECT; although B could work, it does say "abrupt change in sales" so more unpredictable and scaling the EC2 instances in ASG does not help as not only takes time but might also lose the unprocessed data. B would work if they prepare in advance with more instances "pre-warmed" before the sale day but still D is going to solve the unpredictability better.

upvoted 13 times

uos204

3 years, 3 months ago

totally agree, I think you hit in the nail when you say: abrupt change in sales so more unpredictable and scaling the EC2 instances in ASG does not help as not only takes time but might also lose the unprocessed data. Nobody wants to lose a sale request so if you set up to get more EC2, they will take time to be prepared to analyze the request and the customer wants to get a reply of the request asap.

upvoted 5 times

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RidzV

Highly Voted 3 years, 5 months ago

Selected Answer: D

decoupling might help in the effective processing of all requests.

upvoted 7 times

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lbertolini

Most Recent 2 years, 10 months ago

Selected Answer: D

Asynchronous => d, with SQS

upvoted 4 times

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TecoCloud

2 years, 10 months ago

Ans is D Asynchronous - no real-time update required so sales can be queued and processed later that's work for SQS

upvoted 1 times

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tburner

2 years, 11 months ago

Agreed with the person that said keyword 'asynchronous' leads me to believe SQS, so D

upvoted 2 times

bora4motion

2 years, 10 months ago

I still believe you need the right hardware to deal with that. That's what you do when you have a spike in the traffic. You scale to be able to deal with it, you don't queue it and deal...when you can.

upvoted 1 times

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frizzino

3 years, 2 months ago

Selected Answer: B

D would work and it's cheaper but it's less efficient, you would still have only 3 vms for all the traffic. An autoscale group with the appropriate settings would work better.

upvoted 4 times

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kitkwok

3 years, 3 months ago

I go for B, you can't use only three ec2 to handle abrupt surge requests, even with SQS, so what? you still only have three ec2. you use 10000 days to process all the requests?

upvoted 7 times

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waiwaiyan

3 years, 3 months ago

D: Since S3 is good for static, a big and abrupt surge in sales requests >> SQS

upvoted 2 times

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Lotzy

3 years, 3 months ago

Selected Answer: D

Hesitating between B and D, but because there is the "asynchronously" keyword, I would go for D as SQS is a good choice for such processing and smoothing out spikes.

upvoted 4 times

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SmartDude

3 years, 3 months ago

Selected Answer: B

Sale request should be real-time. Adding a queue may delay the process.

upvoted 3 times

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Indy2021

3 years, 5 months ago

Is the purpose of autoscaling for workload increase? You can even set number of requests as the metric to launch new instances. I choose B.

upvoted 3 times

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FF11

3 years, 5 months ago

Selected Answer: D

D is correct. Please disregard my previous vote for B.

upvoted 4 times

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FF11

3 years, 5 months ago

Selected Answer: B

B is the answer.

upvoted 1 times

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BlassArun

3 years, 5 months ago

Ans is B

upvoted 4 times

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Natew

3 years, 5 months ago

D sounds like a bad option if they are going to queue purchase requests. I am guessing they have a finite amount of items to sell so that could have the potential of overselling or over committing.

upvoted 1 times

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Spacer

3 years, 5 months ago

D is better. Auto scaling may still lose some requests. SQS can persist unhandled request.

upvoted 2 times

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MikeDuB

3 years, 5 months ago

I went D because it came down to asking for the efficient "processing of requests" does anyone disagree?

upvoted 1 times

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