DEA-C01 Data Operations and Support Practice Question
A data engineer needs to transfer 10 TB of data from an on-premises data center to Amazon S3. The network bandwidth is limited to 100 Mbps, and the data transfer must be completed within 5 days. What is the most cost-effective solution?
⚠ Common exam trap
A common mix-up: candidates assume S3 Transfer Acceleration or DataSync can magically overcome bandwidth limitations, but they only optimize the path, not increase the pipe size, so the math of bandwidth vs. data volume always dictates the minimum transfer time.
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
✓
Use AWS Snowball Edge to physically ship the data.
With 10 TB of data and a 100 Mbps link, the theoretical transfer time over the internet is approximately 10 days (10 TB * 8 / 100 Mbps = 800,000 seconds ≈ 9.26 days), which exceeds the 5-day requirement. AWS Snowball Edge is the most cost-effective solution because it bypasses the network bottleneck entirely by physically shipping the data, and it is designed for large-scale data transfers where network constraints make online transfer impractical.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Use AWS Snowball Edge to physically ship the data.
Why this is correct
Snowball bypasses network limitations and is cost-effective for large data volumes.
- ✗
Use S3 Transfer Acceleration to speed up the transfer over the internet.
Why it's wrong here
Transfer Acceleration improves speed but still limited by 100 Mbps.
- ✗
Use AWS DataSync over the internet to transfer the data.
Why it's wrong here
DataSync still uses network and would be too slow.
- ✗
Set up an AWS Direct Connect connection to increase bandwidth.
Why it's wrong here
Direct Connect provides dedicated connection but bandwidth is still limited by the on-premises link unless upgraded.
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
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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.