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 (B) is correct because it is an infrequent-access class that stores data in a single Availability Zone while still providing millisecond retrieval latency. S3 Intelligent-Tiering (D) is correct because it automatically moves objects between access tiers based on changing access patterns, and its Frequent and Infrequent Access tiers both deliver millisecond retrieval times. S3 Standard-IA (E) is correct because it is explicitly designed for infrequently accessed data and provides the same low-latency, millisecond retrieval performance as S3 Standard. S3 Glacier Flexible Retrieval (A) is not correct here because its retrieval options range from minutes to hours, not milliseconds, and S3 Glacier Deep Archive (C) is not correct because it is the lowest-cost archive class with retrieval times typically within 12 hours.
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 returns data in minutes to hours, not milliseconds, so it fails the retrieval-time requirement despite being built for infrequent access. It is tempting because it genuinely targets archival, infrequently accessed data, and would be correct where retrieval latency of minutes or hours is acceptable.
- ✓
S3 One Zone-IA
Why this is correct
S3 One Zone-IA stores data in a single Availability Zone, delivering millisecond retrieval while suiting infrequently accessed data. It satisfies the stem's latency constraint because retrieval remains immediate, unlike Glacier tiers requiring minutes to hours. Lower durability than Standard-IA is the trade-off, but the millisecond requirement is met.
- ✗
S3 Glacier Deep Archive
Why it's wrong here
Glacier Deep Archive retrieves within 12 hours, so it cannot meet millisecond retrieval for infrequent data. It is tempting because it is the lowest-cost class for long-term archival of rarely accessed data, and would be correct for compliance archives where retrieval delays of many hours are tolerable.
- ✓
S3 Intelligent-Tiering
Why this is correct
S3 Intelligent-Tiering automatically moves objects between frequent and infrequent access tiers based on changing access patterns, while always delivering millisecond retrieval. This satisfies the stem's requirement for infrequently accessed data with millisecond latency, since its infrequent access tier retains the same low-latency performance as S3 Standard.
- ✓
S3 Standard-IA
Why this is correct
S3 Standard-IA suits infrequent access while preserving millisecond latency, satisfying the stem's retrieval-speed constraint. Unlike Glacier classes, which incur minutes-to-hours restore delays, Standard-IA retrieves objects immediately from the same replicated infrastructure as S3 Standard, merely charging a lower storage rate with a retrieval fee and 30-day minimum duration.
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 |
Go deeper
Related to this question
About these practice questions
This DEA-C01 question is part of Courseiva's 1,321-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
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.