Question 1,643 of 1,711
DEA-C01 Data Store Management Practice Question
A data engineer needs to store clickstream data from a web application in Amazon S3. Each event is about 5 KB, and the application generates 1 million events per hour. The data is used for real-time analytics and also for batch processing. The engineer wants to minimize storage costs while ensuring that data is available for real-time queries as soon as it is written. Which storage class should the engineer use for the S3 bucket?
⚠ Common exam trap
The DEA-C01 exam often tests the misconception that S3 Intelligent-Tiering automatically optimizes costs for all workloads, but the trap here is that the per-object monitoring fee and potential tier transitions make it more expensive than S3 Standard for high-volume, small-object, frequently accessed data like clickstream events.
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.
S3 Standard is the correct choice because it offers low-latency (milliseconds) first-byte-out performance, making data available for real-time queries immediately after writing. It also supports both real-time analytics and batch processing without retrieval fees, and at 5 KB per event with 1 million events per hour (approximately 5 GB/hour or 120 GB/day), the storage cost is manageable compared to the frequent access pattern. S3 Standard is optimized for frequently accessed data and provides the durability and availability needed for clickstream analytics.
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.
Why this is correct
Standard offers the best performance for frequently accessed data and no retrieval fees.
- ✗
S3 Intelligent-Tiering.
Why it's wrong here
Intelligent-Tiering has a per-object monitoring cost; Standard is cheaper for frequent access.
- ✗
S3 Standard-IA.
Why it's wrong here
Standard-IA incurs retrieval fees and is not cost-effective for frequent access.
- ✗
S3 Glacier Instant Retrieval.
Why it's wrong here
Glacier Instant Retrieval is for rarely accessed data and has higher storage cost than Standard.
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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