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Exam AWS Certified Solutions Architect - Associate SAA-C02 topic 1 question 53 discussion

Exam question from Amazon's AWS Certified Solutions Architect - Associate SAA-C02
Question #: 53
Topic #: 1
[All AWS Certified Solutions Architect - Associate SAA-C02 Questions]

A company is running an ecommerce application on Amazon EC2. The application consists of a stateless web tier that requires a minimum of 10 instances, and a peak of 250 instances to support the application's usage. The application requires 50 instances 80% of the time.
Which solution should be used to minimize costs?

  • A. Purchase Reserved Instances to cover 250 instances.
  • B. Purchase Reserved Instances to cover 80 instances. Use Spot Instances to cover the remaining instances.
  • C. Purchase On-Demand Instances to cover 40 instances. Use Spot Instances to cover the remaining instances.
  • D. Purchase Reserved Instances to cover 50 instances. Use On-Demand and Spot Instances to cover the remaining instances.
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Suggested Answer: D 🗳️
by malefin280 at June 1, 2020, 9:47 p.m.
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foreverlearner
Highly Voted 3 years, 8 months ago
Agree with D. Reserved instances for the 50 that are up most of the time, Spot fleet (mix of on-demand and spot) for the others
upvoted 46 times
aguy9
3 years, 6 months ago
I agree, D is the answer
upvoted 2 times
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frizzo
Highly Voted 3 years, 8 months ago
I was thinking 'D' - 'C' seems arbitrary with the number 40 unless you do 80% of 50, which makes no sense to do.
upvoted 17 times
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tigerbaer
Most Recent 2 years, 9 months ago
Selected Answer: D
d is perfect
upvoted 1 times
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jj22222
3 years, 4 months ago
Selected Answer: D
D looks right
upvoted 2 times
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Vibes
3 years, 6 months ago
D is ok
upvoted 2 times
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PhilMultiCloud
3 years, 6 months ago
D for sure
upvoted 4 times
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woke
3 years, 6 months ago
d is correct
upvoted 4 times
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Toks2021
3 years, 6 months ago
D is the best answer
upvoted 3 times
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Abdullah777
3 years, 6 months ago
D in neal
upvoted 3 times
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KK_uniq
3 years, 6 months ago
D for sure
upvoted 2 times
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syu31svc
3 years, 6 months ago
D is the best bet here
upvoted 1 times
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Praps1
3 years, 6 months ago
looks like D
upvoted 1 times
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mryala
3 years, 6 months ago
it's D
upvoted 1 times
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Yogi
3 years, 6 months ago
Ans = D
upvoted 2 times
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Ankitrathi85
3 years, 6 months ago
D right
upvoted 1 times
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umjumasa
3 years, 6 months ago
I go for D. My though about C is that this option could fail to fulffill the price or EC2 quantity requirements because of the spot price at a given time or the compute capacity available in a region for spot instances.
upvoted 1 times
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AEN
3 years, 6 months ago
Ans is D
upvoted 1 times
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