Question 384 of 1,711
DEA-C01 Data Store Management Practice Question
A data engineer needs to store semi-structured JSON data that is accessed infrequently but requires immediate retrieval when needed. The data must be durable and cost-effective. Which Amazon S3 storage class should be used?
⚠ Common exam trap
Candidates often confuse 'infrequently accessed' with 'archival' and choose S3 Glacier, overlooking the 'immediate retrieval' requirement that rules out Glacier's multi-minute or multi-hour retrieval times.
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 is the correct choice because it offers the same durability and low-latency retrieval as S3 Standard but at a lower storage cost, making it ideal for infrequently accessed data that still needs immediate retrieval when requested. The scenario specifies 'infrequently accessed' and 'immediate retrieval,' which aligns with Standard-IA's design for data accessed less than once a month but with millisecond first-byte latency.
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-IA
Why this is correct
Standard-IA is for infrequent access with immediate retrieval.
- ✗
S3 Glacier
Why it's wrong here
Glacier has retrieval delays, not immediate.
- ✗
S3 Standard
Why it's wrong here
Standard is for frequent access, higher cost.
- ✗
S3 One Zone-IA
Why it's wrong here
One Zone-IA is less durable (single AZ).
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 |
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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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