- A
Amazon S3 Glacier Deep Archive
Why wrong: Designed for long-term archival, not suitable for 30-day access.
- B
Amazon S3 One Zone-Infrequent Access (S3 One Zone-IA)
Why wrong: Less durable; logs may need cross-AZ resilience.
- C
Amazon S3 Standard
Why wrong: More expensive for infrequent access patterns.
- D
Amazon S3 Standard-Infrequent Access (S3 Standard-IA)
Cost-effective for infrequently accessed data with rapid access needs.
Question 552 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 data engineer needs to store semi-structured JSON logs from an application for up to 30 days, with infrequent access. Which storage solution is the most cost-effective?
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
✓
Amazon S3 Standard-Infrequent Access (S3 Standard-IA)
Amazon S3 Standard-Infrequent Access (S3 Standard-IA) is the most cost-effective choice for storing semi-structured JSON logs for up to 30 days with infrequent access. It offers low storage cost (compared to S3 Standard) while providing low-latency retrieval and high durability (99.999999999%) across multiple Availability Zones, making it ideal for data that is accessed less frequently but needs immediate availability when requested.
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.
- ✗
Amazon S3 Glacier Deep Archive
Why it's wrong here
Designed for long-term archival, not suitable for 30-day access.
- ✗
Amazon S3 One Zone-Infrequent Access (S3 One Zone-IA)
Why it's wrong here
Less durable; logs may need cross-AZ resilience.
- ✗
Amazon S3 Standard
Why it's wrong here
More expensive for infrequent access patterns.
- ✓
Amazon S3 Standard-Infrequent Access (S3 Standard-IA)
Why this is correct
Cost-effective for infrequently accessed data with rapid access needs.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often choose S3 One Zone-IA (Option B) thinking it is cheaper due to single-AZ storage, but they overlook the durability and availability requirements for logs that may need to be recovered from an AZ failure, and the fact that S3 Standard-IA is actually more cost-effective for this 30-day retention scenario when considering retrieval costs and minimum storage charges.
Detailed technical explanation
How to think about this question
S3 Standard-IA charges a per-GB storage fee that is roughly half that of S3 Standard, but adds a per-GB retrieval fee, which is cost-effective when access frequency is low. The 30-day minimum storage duration charge for S3 Standard-IA (and S3 One Zone-IA) means that if you delete objects before 30 days, you still pay for the full 30 days, which aligns perfectly with the 30-day retention requirement. Under the hood, S3 Standard-IA uses the same 99.999999999% durability and 99.99% availability as S3 Standard, but with a different pricing model that penalizes frequent access via retrieval costs.
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: Amazon S3 Standard-Infrequent Access (S3 Standard-IA) — Amazon S3 Standard-Infrequent Access (S3 Standard-IA) is the most cost-effective choice for storing semi-structured JSON logs for up to 30 days with infrequent access. It offers low storage cost (compared to S3 Standard) while providing low-latency retrieval and high durability (99.999999999%) across multiple Availability Zones, making it ideal for data that is accessed less frequently but needs immediate availability when requested.
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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 24, 2026
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