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Exam AWS Certified Data Engineer - Associate DEA-C01 All Questions

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Exam AWS Certified Data Engineer - Associate DEA-C01 topic 1 question 23 discussion

Exam question from Amazon's AWS Certified Data Engineer - Associate DEA-C01
Question #: 23
Topic #: 1
[All AWS Certified Data Engineer - Associate DEA-C01 Questions]

A company currently stores all of its data in Amazon S3 by using the S3 Standard storage class.
A data engineer examined data access patterns to identify trends. During the first 6 months, most data files are accessed several times each day. Between 6 months and 2 years, most data files are accessed once or twice each month. After 2 years, data files are accessed only once or twice each year.
The data engineer needs to use an S3 Lifecycle policy to develop new data storage rules. The new storage solution must continue to provide high availability.
Which solution will meet these requirements in the MOST cost-effective way?

  • A. Transition objects to S3 One Zone-Infrequent Access (S3 One Zone-IA) after 6 months. Transfer objects to S3 Glacier Flexible Retrieval after 2 years.
  • B. Transition objects to S3 Standard-Infrequent Access (S3 Standard-IA) after 6 months. Transfer objects to S3 Glacier Flexible Retrieval after 2 years.
  • C. Transition objects to S3 Standard-Infrequent Access (S3 Standard-IA) after 6 months. Transfer objects to S3 Glacier Deep Archive after 2 years.
  • D. Transition objects to S3 One Zone-Infrequent Access (S3 One Zone-IA) after 6 months. Transfer objects to S3 Glacier Deep Archive after 2 years.
Show Suggested Answer Hide Answer
Suggested Answer: C 🗳️
by TonyStark0122 at Feb. 1, 2024, 11:05 p.m.
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helpaws
Highly Voted 7 months ago
Selected Answer: B
"S3 Glacier Flexible Retrieval delivers low-cost storage, up to 10% lower cost (than S3 Glacier Instant Retrieval), for archive data that is accessed 1-2 times per year and is retrieved asynchronously" Source: https://aws.amazon.com/s3/storage-classes/glacier/
upvoted 19 times
ttpro1995
3 months, 3 weeks ago
The requirement does not state how fast data need to be retrieval. So, pick Glacier deep for even more cost saving.
upvoted 2 times
JimOGrady
3 weeks, 4 days ago
question states: "must continue to provide high availability." So NOT Deep Archive
upvoted 1 times
sam_pre
3 weeks, 1 day ago
High availability and fast retrieval are two different things
upvoted 1 times
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WarPig666
Highly Voted 4 months, 1 week ago
Selected Answer: C
Flexible retrieval will be higher cost than deep archive. If records only need to be retrieved once or twice a year, this doesn't mean they need to be instantly available.
upvoted 7 times
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Rpathak4
Most Recent 3 weeks, 6 days ago
Selected Answer: C
Why Not the Other Options? A. S3 One Zone-IA → Glacier Flexible Retrieval ❌ One Zone-IA is risky (data loss if the AZ fails). Glacier Flexible Retrieval is more expensive than Deep Archive. B. S3 Standard-IA → Glacier Flexible Retrieval ❌ Glacier Flexible Retrieval is not the cheapest long-term storage. Deep Archive costs much less. D. S3 One Zone-IA → Glacier Deep Archive ❌ One Zone-IA lacks high availability (single AZ failure = data loss). S3 Standard-IA is safer.
upvoted 1 times
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anonymous_learner_2
1 month, 4 weeks ago
Selected Answer: C
Glacier deep archive has the same availability as flexible retrieval and there's no retrieval time requirement so C is the most cost effective that meets the requirements.
upvoted 2 times
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luigiDDD
2 months, 3 weeks ago
Selected Answer: C
C is the most cost effective
upvoted 2 times
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plutonash
3 months, 1 week ago
Selected Answer: B
"data files are accessed only once or twice each year", this is "S3 Glacier Flexible Retrieval" definition
upvoted 1 times
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Udyan
3 months, 1 week ago
Selected Answer: C
Is it mentioned in question that Retrieval time is constraint, no, so, if any engineer need to access data, say May and November, so he/she can wait for 2-3 days to get data, as in the long run, they have an year to analyze the data so, deep archive will save costs only.
upvoted 2 times
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Udyan
3 months, 1 week ago
Selected Answer: C
This question was in Stephen Maarek Udemy practice questions too, here concern not given for extraction time so, just see cost friendlyness, thus, C over B
upvoted 2 times
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HagarTheHorrible
4 months ago
Selected Answer: B
deep archive doesn't make sense
upvoted 1 times
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Eleftheriia
4 months, 2 weeks ago
Selected Answer: B
For once or twice a year it is flexible retrieval.
upvoted 1 times
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jk15997
4 months, 2 weeks ago
Selected Answer: C
There is no requirement for the retrieval time.
upvoted 2 times
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altonh
4 months, 2 weeks ago
Selected Answer: C
There is no requirement for the retrieval time. So this is more cost-effective.
upvoted 4 times
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iamwatchingyoualways
4 months, 3 weeks ago
Selected Answer: C
No instant access is mentioned. Most Cost effective.
upvoted 3 times
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truongnguyen86
5 months ago
Selected Answer: B
Option B is the correct answer because it balances cost-effectiveness and availability: S3 Standard-IA offers cost savings for infrequently accessed data while maintaining high availability across multiple zones. S3 Glacier Flexible Retrieval is a good balance for archiving with occasional access needs.
upvoted 2 times
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lsj900605
5 months, 1 week ago
Selected Answer: B
B High availability means the need for readily available service. S3 Standard-IA deliver 99.9% availability vs S3 One Zone-IA deliver 99.5% availability S3 Glacier Flexible Retrieval has configurable retrieval times, from minutes to hours, with free bulk retrievals. But with S3 Glacier Deep Archive it's retrieval time is within 12 hours https://aws.amazon.com/s3/storage-classes/
upvoted 1 times
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LrdKanien
5 months, 3 weeks ago
Selected Answer: B
B due to flex
upvoted 1 times
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michele_scar
6 months, 2 weeks ago
Selected Answer: C
It's C, the request is about "High availability" not "Less time to retrieve the data". The other request is "most cost effective" so deleting A and D for the HA, remains B and C that both satisfy the HA. Now choose the most cost effective --> C
upvoted 3 times
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