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Exam AWS Certified Solutions Architect - Professional topic 1 question 24 discussion

Exam question from Amazon's AWS Certified Solutions Architect - Professional
Question #: 24
Topic #: 1
[All AWS Certified Solutions Architect - Professional Questions]

Your company is storing millions of sensitive transactions across thousands of 100-GB files that must be encrypted in transit and at rest. Analysts concurrently depend on subsets of files, which can consume up to 5 TB of space, to generate simulations that can be used to steer business decisions.
You are required to design an AWS solution that can cost effectively accommodate the long-term storage and in-flight subsets of data.
Which approach can satisfy these objectives?

  • A. Use Amazon Simple Storage Service (S3) with server-side encryption, and run simulations on subsets in ephemeral drives on Amazon EC2.
  • B. Use Amazon S3 with server-side encryption, and run simulations on subsets in-memory on Amazon EC2.
  • C. Use HDFS on Amazon EMR, and run simulations on subsets in ephemeral drives on Amazon EC2.
  • D. Use HDFS on Amazon Elastic MapReduce (EMR), and run simulations on subsets in-memory on Amazon Elastic Compute Cloud (EC2).
  • E. Store the full data set in encrypted Amazon Elastic Block Store (EBS) volumes, and regularly capture snapshots that can be cloned to EC2 workstations.
Show Suggested Answer Hide Answer
Suggested Answer: A 🗳️
by nitinz at March 18, 2021, 10:10 p.m.
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amministrazione
1 year ago
A. Use Amazon Simple Storage Service (S3) with server-side encryption, and run simulations on subsets in ephemeral drives on Amazon EC2.
upvoted 1 times
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KevinYao
1 year, 9 months ago
Selected Answer: A
S3 is best option for long term storage.
upvoted 1 times
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sr987654
2 years, 6 months ago
Selected Answer: A
many explanations below, long term storage + 5TB capacity needed makes A the best option
upvoted 2 times
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TigerInTheCloud
2 years, 8 months ago
Selected Answer: A
A is the best one among the answers S3 (storage) + Anthan or Redshift Spectrum could be a better solution. HDFS is expensive non-long-term storage. 5TB in-memory (RAM) is expensive. EBS expensive than S3
upvoted 2 times
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hobokabobo
2 years, 9 months ago
Selected Answer: A
That said HDFS cached on local EBS is the most reasonable approach of the given approaches: A. HDFS vrs S3: small files and store only nectling EMR features. Store on disk because 5TB in ram would be huge. A
upvoted 1 times
hobokabobo
2 years, 7 months ago
It should read s3 cached on EBS. Hence the selection of A.
upvoted 1 times
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LeoExam
2 years, 11 months ago
why not B, the u-24tb1.metal can provide 24TB memory, and data handled in memory will be more secure than in EBS
upvoted 3 times
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davideccc
2 years, 11 months ago
Selected Answer: A
the only reasonable options are A and C (5TB in memory? no way). However C does not mention any long-term storage service, leaving A as the only reasonable answer (not the best approach though - which would be have the processing in EMR and the storage in S3. The EMR cluster can get subset data directly from S3 using EMRFS)
upvoted 1 times
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virtual
3 years, 3 months ago
Selected Answer: A
Because of "long term storage" specified. EMR is not a service designed for that. So S3 seems to be accurate.
upvoted 3 times
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jj22222
3 years, 4 months ago
Selected Answer: A
A. Use Amazon Simple Storage Service (S3) with server-side encryption, and run simulations on subsets in ephemeral drives on Amazon EC2.
upvoted 1 times
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Alvindo
3 years, 5 months ago
Selected Answer: A
https://docs.aws.amazon.com/emr/latest/ManagementGuide/emr-plan-file-systems.html this link tells us hdfs isn't long-term which by itself cancels out c and d, leaving a as only practical answer
upvoted 1 times
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pititcu667
3 years, 7 months ago
Selected Answer: D
because of emr
upvoted 1 times
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Vendu
3 years, 7 months ago
Selected Answer: A
S3 would be cist effective compare to EMR
upvoted 1 times
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wahlbergusa
3 years, 7 months ago
Asks for a cost effective solution. S3 is better than EMR.
upvoted 1 times
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dv1
3 years, 8 months ago
EMR can do encryption at rest and in transit: https://docs.aws.amazon.com/emr/latest/ManagementGuide/emr-data-encryption.html Also, you can combine EMR with EC2 for running simulations: https://aws.amazon.com/getting-started/hands-on/optimize-amazon-emr-clusters-with-ec2-spot/
upvoted 3 times
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Bhagirathi
3 years, 9 months ago
can someone pls help explain - why / how it should be A?
upvoted 1 times
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Akhil254
3 years, 9 months ago
A Correct
upvoted 1 times
ciberado
3 years, 9 months ago
The question does not explictly says the ephemeral storage is going to be encrypted in any way, so I would discard this option.
upvoted 1 times
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backfringe
3 years, 9 months ago
I go with A as it says cost-effective
upvoted 3 times
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