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Exam AWS Certified Data Analytics - Specialty topic 1 question 81 discussion

Exam question from Amazon's AWS Certified Data Analytics - Specialty
Question #: 81
Topic #: 1
[All AWS Certified Data Analytics - Specialty Questions]

An online retailer needs to deploy a product sales reporting solution. The source data is exported from an external online transaction processing (OLTP) system for reporting. Roll-up data is calculated each day for the previous day's activities. The reporting system has the following requirements:
✑ Have the daily roll-up data readily available for 1 year.
✑ After 1 year, archive the daily roll-up data for occasional but immediate access.
✑ The source data exports stored in the reporting system must be retained for 5 years. Query access will be needed only for re-evaluation, which may occur within the first 90 days.
Which combination of actions will meet these requirements while keeping storage costs to a minimum? (Choose two.)

  • A. Store the source data initially in the Amazon S3 Standard-Infrequent Access (S3 Standard-IA) storage class. Apply a lifecycle configuration that changes the storage class to Amazon S3 Glacier Deep Archive 90 days after creation, and then deletes the data 5 years after creation.
  • B. Store the source data initially in the Amazon S3 Glacier storage class. Apply a lifecycle configuration that changes the storage class from Amazon S3 Glacier to Amazon S3 Glacier Deep Archive 90 days after creation, and then deletes the data 5 years after creation.
  • C. Store the daily roll-up data initially in the Amazon S3 Standard storage class. Apply a lifecycle configuration that changes the storage class to Amazon S3 Glacier Deep Archive 1 year after data creation.
  • D. Store the daily roll-up data initially in the Amazon S3 Standard storage class. Apply a lifecycle configuration that changes the storage class to Amazon S3 Standard-Infrequent Access (S3 Standard-IA) 1 year after data creation.
  • E. Store the daily roll-up data initially in the Amazon S3 Standard-Infrequent Access (S3 Standard-IA) storage class. Apply a lifecycle configuration that changes the storage class to Amazon S3 Glacier 1 year after data creation.
Show Suggested Answer Hide Answer
Suggested Answer: BD 🗳️
by VikG12 at May 3, 2021, 5:37 p.m.
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bryankeb
Highly Voted 3 years, 8 months ago
A,D for sure
upvoted 28 times
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npt
Highly Voted 3 years, 5 months ago
B and D Have the daily roll-up data readily available for 1 year. After 1 year, archive the daily roll-up data for occasional but immediate access -> D: Standard and Standard IA after 1 year. Query access will be needed ONLY for re-evaluation, which MAY occur within the first 90 days -> Glacier is enough, there is no require for immediate access, and we also don't know it's frequency, but "ONLY" and "MAY" keywords can indicate that it's rare to do re-evaluation. Question asks for minimizing the cost, so B, not A
upvoted 14 times
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jerintom
Most Recent 1 year, 9 months ago
B and D, Objects cannot be directly transitioned to Amazon S3 Standard-Infrequent Access (S3 Standard-IA), objects must be stored for a minimum of 30 days before they can be transitioned to this storage class- So it has to be stored as Amazon S3 Standard storage class for the first year to satisfy immediate access requirement.
upvoted 1 times
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MLCL
1 year, 10 months ago
Selected Answer: BE
The right answer is BE. S3 Glacier has instant access.
upvoted 2 times
MLCL
1 year, 10 months ago
https://aws.amazon.com/s3/storage-classes/glacier/instant-retrieval/
upvoted 1 times
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MLCL
1 year, 10 months ago
But the occasional keyword points to S3 IA, so probable BD
upvoted 1 times
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pk349
2 years, 1 month ago
BD: I passed the test
upvoted 1 times
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rsn
2 years, 2 months ago
Selected Answer: BC
This seems more appropriate to me
upvoted 1 times
rsn
2 years, 2 months ago
I meant BD and not BC
upvoted 1 times
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Aina
2 years, 2 months ago
Selected Answer: BD
It is B instead of A because the source data is not really used for any immediate querying ever. It is processing to create the roll-up data and that's it. So it makes sense to store it in the cheapest storage, which is Glacier.
upvoted 4 times
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milofficial
2 years, 4 months ago
Selected Answer: BD
Two kinds of data. For the roll-up data everyone agrees on D instead of E. For the source data it is B not A because the source data does not have to be accessed immediately.
upvoted 2 times
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Ody__
2 years, 5 months ago
Selected Answer: BD
B & D https://aws.amazon.com/s3/pricing/ B because S3 Glacier Instant Retrieval - For long-lived archive data accessed once a quarter with instant retrieval in milliseconds
upvoted 3 times
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silvaa360
2 years, 5 months ago
As per Udemy preparation course, the Glacier that these questions mention must be the "Glacier Flexible Retrieval" that has 3 options: expedited (1 to 5 minutes), standard (3 to 5 hours) and bulk (5 to 12 hours). Only the bulk option is free. So, the question here about A vs B is the cost of possible retrievals vs cost of IA. I think that possibly the glacier can become costlier as we MAY have to access the data a uncertain number of times. Having this said I would pick A & D, but I'm still very doubtfull tbh...
upvoted 3 times
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SivaFawkes16
2 years, 6 months ago
Option E is obvious for roll-up data and seems clear from the comments here. Between A and B, I would choose B as it has lesser cost, which is clearly stated in the question. Refer here for cost structure: https://aws.amazon.com/s3/pricing/
upvoted 1 times
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cloudlearnerhere
2 years, 7 months ago
Selected Answer: AD
Correct answers are A & D Option A as the source data exports can be stored in (S3 Standard-IA) storage class for 90 days if needed, and then moved to S3 Glacier Deep Archive for 5 years before it is expired. Option D as the roll-up data can be stored in Standard class for a year and then moved to S3 Standard-IA to save cost but still provide immediate access. Option B is wrong as although you can transition the objects directly to the S3 Glacier storage class, the data would not be readily available for roll-up calculation and would cost more to perform the roll-up. Options C & E are wrong as S3 Glacier and Glacier Deep Archive would not be able to provide immediate access to the roll-up data.
upvoted 7 times
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b33f
2 years, 7 months ago
Selected Answer: BD
B and D B (S3 Glacier) instead of A (S3 Standard-IA) keeps storage costs to a minimum. Query access to the source data may or may not occur within the first 90 days. S3 Glacier will do.
upvoted 3 times
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JHJHJHJHJ
2 years, 8 months ago
✑ Have the daily roll-up data readily available for 1 year. ✑ After 1 year, archive the daily roll-up data for occasional but immediate access. Which combination of actions will meet these requirements while keeping storage costs to a minimum? Answer E - Cost is low and readily available Store the daily roll-up data initially in the Amazon S3 Standard-Infrequent Access (S3 Standard-IA) storage class. Apply a lifecycle configuration that changes the storage class to Amazon S3 Glacier 1 year after data creation.
upvoted 1 times
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lygf
2 years, 8 months ago
Selected Answer: AD
Even S3 Glacier can have instant retrieval https://aws.amazon.com/s3/storage-classes/glacier/ S3 Glacier Instant Retrieval delivers the lowest cost storage, up to 68% lower cost (than S3 Standard-Infrequent Access), for long-lived data that is accessed once per quarter and requires millisecond retrieval..
upvoted 1 times
lygf
2 years, 8 months ago
Sorry, should be B&D
upvoted 1 times
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he11ow0rId
2 years, 8 months ago
Selected Answer: BD
Between A and B, I think for the context of the exam, it should be B. 90 days is a keyword for Glacier as all Glacier tiers require 90 days min storage
upvoted 3 times
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rocky48
2 years, 10 months ago
Selected Answer: AD
upvoted 1 times
rocky48
2 years, 4 months ago
Selected Answer : B & D Link : https://aws.amazon.com/s3/pricing/ B because S3 Glacier Instant Retrieval - For long-lived archive data accessed once a quarter with instant retrieval in milliseconds.
upvoted 1 times
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