Question 1,726 of 1,711
DEA-C01 Data Store Management Practice Question
A data engineer is evaluating storage options for a new application that requires low-latency access to unstructured blobs (up to 5 TB each) with high throughput. The data will be accessed frequently for the first 30 days and then rarely. Which TWO storage solutions meet these requirements? (Choose TWO)
⚠ Common exam trap
A common mix-up: candidates confuse block storage (EBS) or file storage (EFS) with object storage (S3), or overlook that lifecycle policies are the key to handling the 'frequent then rare' access pattern, leading them to choose EBS or EFS for blob storage.
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 with lifecycle policies
Amazon S3 with lifecycle policies is correct because S3 provides low-latency access to unstructured blobs (up to 5 TB each) with high throughput, and lifecycle policies can automatically transition objects to colder storage tiers (e.g., S3 Glacier Deep Archive) after 30 days, matching the access pattern of frequent then rare access.
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 with lifecycle policies
Why this is correct
S3 can handle large objects and lifecycle policies automate transitions to cost-optimized storage.
- ✗
Amazon EBS with io2 Block Express volumes
Why it's wrong here
EBS volumes are attached to a single EC2 instance and not ideal for shared access to large blobs.
- ✗
Amazon EFS
Why it's wrong here
EFS is a file system for Linux, but throughput may not be as high as FSx for Lustre for very large objects.
- ✗
Amazon RDS for PostgreSQL
Why it's wrong here
RDS is a relational database, not for unstructured blobs.
- ✓
Amazon FSx for Lustre
Why this is correct
FSx for Lustre provides high throughput and low latency for large files and can be integrated with S3.
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: Jun 24, 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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