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Exam AWS Certified Solutions Architect - Professional topic 1 question 779 discussion

Exam question from Amazon's AWS Certified Solutions Architect - Professional
Question #: 779
Topic #: 1
[All AWS Certified Solutions Architect - Professional Questions]

A medical company is running an application in the AWS Cloud. The application simulates the effect of medical drugs in development.
The application consists of two parts: configuration and simulation. The configuration part runs in AWS Fargate containers in an Amazon Elastic Container Service
(Amazon ECS) cluster. The simulation part runs on large, compute optimized Amazon EC2 instances. Simulations can restart if they are interrupted.
The configuration part runs 24 hours a day with a steady load. The simulation part runs only for a few hours each night with a variable load. The company stores simulation results in Amazon S3, and researchers use the results for 30 days. The company must store simulations for 10 years and must be able to retrieve the simulations within 5 hours.
Which solution meets these requirements MOST cost-effectively?

  • A. Purchase an EC2 Instance Savings Plan to cover the usage for the configuration part. Run the simulation part by using EC2 Spot Instances. Create an S3 Lifecycle policy to transition objects that are older than 30 days to S3 Intelligent-Tiering.
  • B. Purchase an EC2 Instance Savings Plan to cover the usage for the configuration part and the simulation part. Create an S3 Lifecycle policy to transition objects that are older than 30 days to S3 Glacier.
  • C. Purchase Compute Savings Plans to cover the usage for the configuration part. Run the simulation part by using EC2 Spot Instances. Create an S3 Lifecycle policy to transition objects that are older than 30 days to S3 Glacier.
  • D. Purchase Compute Savings Plans to cover the usage for the configuration part. Purchase EC2 Reserved Instances for the simulation part. Create an S3 Lifecycle policy to transition objects that are older than 30 days to S3 Glacier Deep Archive.
Show Suggested Answer Hide Answer
Suggested Answer: C 🗳️
by techn00b at Dec. 29, 2021, 2:50 a.m.
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AndySH
Highly Voted 2 years, 7 months ago
C is correct. A is wrong: "older than 30 days to S3 Intelligent-Tiering."- Good for unpredictable retrieval requirements. Not cost effective. B is wrong: Savings Plan to cover also for simulation part which can be interrupted and restarted - Not cost effective. D is wrong: "be able to recover them within five hours". Glacier Deep Archive retrieval time within 12 hours. Does not meet the requirements.
upvoted 11 times
Yamchi
2 years, 5 months ago
C is correct.
upvoted 1 times
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Anhdd
2 years, 4 months ago
agree with you, C should be the best option here
upvoted 1 times
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wassb
1 year, 11 months ago
C is correct. A,B are automatically ruled out since EC2 instance savings plans doesnt apply to Fargate
upvoted 1 times
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SkyZeroZx
Most Recent 1 year, 3 months ago
Selected Answer: C
A , B Saving Plan for EC2 fargate not apply in this case , is incorrect for Most cost effectively C) Compute saving plans sounds good for save cost in fargate , spot instance for ec2 is good option because simulations can restart if they are interrupted. S3 Glacier is correct for retrieve data in 5 hours D) S3 Glacier Deep Archive take 24-48h retrieve data
upvoted 1 times
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yama234
1 year, 5 months ago
C configuration part runs in AWS Fargate containers → Compute Savings Plans to cover the usage for the configuration part = Simulations can restart if they are interrupted　→ EC2 Spot Instances researchers use the results for 30 days, store simulations for 10 years and must be able to retrieve the simulations within 5 hours → S3 Lifecycle policy of S3 Glacier
upvoted 1 times
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hilft
2 years, 2 months ago
C. spot/s3 glacier
upvoted 1 times
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aandc
2 years, 3 months ago
C can be interrupted and restarted -> Spot Instances
upvoted 1 times
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kangtamo
2 years, 3 months ago
Selected Answer: C
Agree with C: 30 days / S3 Glacier
upvoted 1 times
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Anhdd
2 years, 4 months ago
Selected Answer: C
C is good for simulation part which can be interrupted and restarted + data retrieve within 5 hours -> best cost-effective
upvoted 1 times
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JYZ
2 years, 5 months ago
No option is good. (see s3 glacier retrieval time from https://docs.aws.amazon.com/prescriptive-guidance/latest/backup-recovery/amazon-s3-glacier.html
upvoted 1 times
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Milind
2 years, 8 months ago
B is correct, C mentioned spot instance D mentioned deep archive that requires 11 hours for retrieval.
upvoted 1 times
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gm
2 years, 8 months ago
Correct answer is C,
upvoted 3 times
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tkanmani76
2 years, 9 months ago
C is correct - https://aws.amazon.com/about-aws/whats-new/2019/03/S3-glacier-deep-archive/ takes 12 hr so D is not right.
upvoted 2 times
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Soumyashree
2 years, 9 months ago
If a simulation is interrupted, it may be restarted. -- C mentions Spot Instances, I go for D
upvoted 2 times
Student1950
2 years, 8 months ago
I believe simulation can be restarted if interrupted with the selection of spot instances. I would go with C
upvoted 2 times
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techn00b
2 years, 9 months ago
Answer is C - 5 hours of retrieval time https://docs.aws.amazon.com/prescriptive-guidance/latest/backup-recovery/amazon-s3-glacier.html
upvoted 1 times
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