DEA-C01 Data Store Management Practice Question
Which THREE storage classes in Amazon S3 are designed for infrequently accessed data with millisecond retrieval times? (Select THREE.)
⚠ Common exam trap
Candidates often confuse S3 Glacier Flexible Retrieval or S3 Glacier Deep Archive as having millisecond retrieval times, but these classes are designed for archival access with retrieval times measured in minutes or hours, not milliseconds.
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 One Zone-IA
S3 One Zone-IA is designed for infrequently accessed data that requires millisecond retrieval times, but does not require the resilience of multiple Availability Zones. It stores data in a single AZ and offers the same low-latency performance as S3 Standard, making it suitable for non-critical, infrequently accessed data.
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 Glacier Flexible Retrieval
Why it's wrong here
Glacier Flexible Retrieval has retrieval times of minutes to hours.
- ✓
S3 One Zone-IA
Why this is correct
One Zone-IA also provides millisecond retrieval for infrequently accessed data.
- ✗
S3 Glacier Deep Archive
Why it's wrong here
Deep Archive has retrieval times of 12 hours or more.
- ✓
S3 Intelligent-Tiering
Why this is correct
Intelligent-Tiering automatically moves data between access tiers, including IA, with millisecond retrieval.
- ✓
S3 Standard-IA
Why this is correct
Standard-IA is for infrequently accessed data with millisecond retrieval.
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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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.