- A
S3 Standard
Why wrong: Higher cost for infrequent access.
- B
S3 Standard-IA
Designed for infrequently accessed data with immediate retrieval.
- C
S3 Glacier Deep Archive
Why wrong: Has retrieval delays (12 hours).
- D
S3 Intelligent-Tiering
Why wrong: Good for unknown patterns, but not best for known infrequent access.
Question 196 of 1,786
DEA-C01 Data Store Management Practice Question
This DEA-C01 practice question tests your understanding of data store management. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company is using Amazon S3 to store large amounts of archival data. The data is accessed infrequently but must be immediately retrievable when needed. Which storage class is the most cost-effective choice?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"immediately / without restart"Why it matters: Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
S3 Standard-IA
S3 Standard-IA (Infrequent Access) is the most cost-effective choice because it offers lower storage costs than S3 Standard while still providing millisecond first-byte latency for immediate retrieval. The data is accessed infrequently but requires instant availability, which matches the IA use case exactly.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
S3 Standard
Why it's wrong here
Higher cost for infrequent access.
- ✓
S3 Standard-IA
Why this is correct
Designed for infrequently accessed data with immediate retrieval.
Clue confirmation
The clue word "immediately / without restart" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
S3 Glacier Deep Archive
Why it's wrong here
Has retrieval delays (12 hours).
- ✗
S3 Intelligent-Tiering
Why it's wrong here
Good for unknown patterns, but not best for known infrequent access.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse 'immediately retrievable' with 'lowest cost' and choose Glacier Deep Archive, overlooking the critical requirement for instant access versus the 12-48 hour retrieval time of Deep Archive.
Detailed technical explanation
How to think about this question
S3 Standard-IA uses the same low-latency, high-throughput performance as S3 Standard but with a 30-day minimum storage duration charge and a per-GB retrieval fee to offset the lower storage price. Under the hood, data is stored on the same redundant hardware but with a different pricing model that penalizes frequent access, making it ideal for data accessed once per quarter or less. A real-world scenario is storing backup logs that must be available within seconds for compliance audits but are rarely accessed otherwise.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this DEA-C01 question test?
Data Store Management — This question tests Data Store Management — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: S3 Standard-IA — S3 Standard-IA (Infrequent Access) is the most cost-effective choice because it offers lower storage costs than S3 Standard while still providing millisecond first-byte latency for immediate retrieval. The data is accessed infrequently but requires instant availability, which matches the IA use case exactly.
What should I do if I get this DEA-C01 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "immediately / without restart". Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
This DEA-C01 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DEA-C01 exam.
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