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Exam AWS Certified Solutions Architect - Professional topic 1 question 558 discussion

Exam question from Amazon's AWS Certified Solutions Architect - Professional
Question #: 558
Topic #: 1
[All AWS Certified Solutions Architect - Professional Questions]

A company has a website that enables users to upload videos. Company policy states the uploaded videos must be analyzed for restricted content. An uploaded video is placed in Amazon S3, and a message is pushed to an Amazon SQS queue with the video's location. A backend application pulls this location from
Amazon SQS and analyzes the video.
The video analysis is compute-intensive and occurs sporadically during the day. The website scales with demand. The video analysis application runs on a fixed number of instances. Peak demand occurs during the holidays, so the company must add instances to the application during this time. All instances used are currently on-demand Amazon EC2 T2 instances. The company wants to reduce the cost of the current solution.
Which of the following solutions is MOST cost-effective?

  • A. Keep the website on T2 instances. Determine the minimum number of website instances required during off-peak times and use Spot Instances to cover them while using Reserved Instances to cover peak demand. Use Amazon EC2 R4 and Amazon EC2 R5 Reserved Instances in an Auto Scaling group for the video analysis application.
  • B. Keep the website on T2 instances. Determine the minimum number of website instances required during off-peak times and use Reserved Instances to cover them while using On-Demand Instances to cover peak demand. Use Spot Fleet for the video analysis application comprised of Amazon EC2 C4 and Amazon EC2 C5 Spot Instances.
  • C. Migrate the website to AWS Elastic Beanstalk and Amazon EC2 C4 instances. Determine the minimum number of website instances required during off-peak times and use On-Demand Instances to cover them while using Spot capacity to cover peak demand. Use Spot Fleet for the video analysis application comprised of C4 and Amazon EC2 C5 instances.
  • D. Migrate the website to AWS Elastic Beanstalk and Amazon EC2 R4 instances. Determine the minimum number of website instances required during off-peak times and use Reserved Instances to cover them while using On-Demand Instances to cover peak demand. Use Spot Fleet for the video analysis application comprised of R4 and Amazon EC2 R5 instances.
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Suggested Answer: B 🗳️
by LunchTime at March 28, 2020, 9:37 p.m.
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Pupu86
Highly Voted 3 years, 6 months ago
B is correct as it uses C4 and C5 (compute intensive instances) while D uses R4 and R5 (memory intensive instances) even if beanstalk auto-scaling is taken into account.
upvoted 13 times
joe16
3 years, 6 months ago
B. Main points to support this answer - Reserved Instances for off-peak load, spot for video processing, C4/5 for compute optimized video processing.
upvoted 2 times
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Waiweng
Highly Voted 3 years, 6 months ago
it's B
upvoted 7 times
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SkyZeroZx
Most Recent 1 year, 10 months ago
Selected Answer: B
B is correct as it uses C4 and C5 (compute intensive instances) while D uses R4 and R5 (memory intensive instances) even if beanstalk auto-scaling is taken into account.
upvoted 1 times
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romiao106
2 years ago
Eliminate C, D because the question says to keep the current solution, just reduce costs.
upvoted 1 times
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AzureDP900
3 years, 4 months ago
B is correct
upvoted 2 times
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cldy
3 years, 4 months ago
B. Keep the website on T2 instances. Determine the minimum number of website instances required during off-peak times and use Reserved Instances to cover them while using On-Demand Instances to cover peak demand. Use Spot Fleet for the video analysis application comprised of Amazon EC2 C4 and Amazon EC2 C5 Spot Instances.
upvoted 2 times
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AzureDP900
3 years, 5 months ago
B is right.. use Reserved Instances to cover them while using On-Demand Instances to cover peak demand. Use Spot Fleet
upvoted 2 times
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WhyIronMan
3 years, 6 months ago
I'll go with B
upvoted 1 times
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hezll
3 years, 6 months ago
why not D. Beanstalk has auto-scalling,
upvoted 2 times
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Ebi
3 years, 6 months ago
I go with B
upvoted 3 times
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T14102020
3 years, 6 months ago
Correct is B. T2 + RI for off-peak + without Beanstalk
upvoted 2 times
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jackdryan
3 years, 6 months ago
I'll go with B
upvoted 2 times
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CYL
3 years, 6 months ago
B. Correct usage of reserved, on-demand and spot instances.
upvoted 1 times
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NikkyDicky
3 years, 6 months ago
B. Dup of Q159
upvoted 3 times
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meenu2225
3 years, 6 months ago
B seems right
upvoted 2 times
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Mkumar
3 years, 6 months ago
Answer is B
upvoted 4 times
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LunchTime
3 years, 7 months ago
This is a replication of Question #159Topic 2
upvoted 1 times
shyamexamprep
2 years, 6 months ago
where is topic 2 questions pls confirm? I am preparing for solution architect professional exam ,kindly confirm examtopics questions from 390-953 are enough to pass the exam.
upvoted 2 times
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Community vote distribution
A (35%)
C (25%)
B (20%)
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