- A
Use AWS DataSync to transfer data online
Why wrong: DataSync still uses the network and would be too slow.
- B
Use AWS Snowball Edge device to transfer data offline
Snowball Edge can transfer 10 TB offline within days.
- C
Use S3 Transfer Acceleration over the internet
Why wrong: Even with acceleration, 100 Mbps would take ~23 days for 10 TB.
- D
Set up AWS Direct Connect to increase bandwidth
Why wrong: Direct Connect setup may exceed 48 hours and still relies on bandwidth.
Question 620 of 1,786
DEA-C01 Data Store Management Practice Question
This DEA-C01 practice question tests your understanding of data store management. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A data engineer needs to transfer 10 TB of data from an on-premises Hadoop cluster to Amazon S3. The network bandwidth is limited to 100 Mbps, and the transfer must be completed within 48 hours. Which solution meets the requirements?
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 device to transfer data offline
The on-premises Hadoop cluster has 10 TB of data to transfer, but the network bandwidth is only 100 Mbps. At 100 Mbps, the theoretical maximum transfer rate is about 12.5 MB/s, which would take approximately 10 TB / 12.5 MB/s ≈ 800,000 seconds ≈ 222 hours — far exceeding the 48-hour window. AWS Snowball Edge is an offline, physical device that bypasses network constraints entirely, allowing you to transfer the data by shipping the device, which completes within days regardless of bandwidth.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 DataSync to transfer data online
Why it's wrong here
DataSync still uses the network and would be too slow.
- ✓
Use AWS Snowball Edge device to transfer data offline
Why this is correct
Snowball Edge can transfer 10 TB offline within days.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use S3 Transfer Acceleration over the internet
Why it's wrong here
Even with acceleration, 100 Mbps would take ~23 days for 10 TB.
- ✗
Set up AWS Direct Connect to increase bandwidth
Why it's wrong here
Direct Connect setup may exceed 48 hours and still relies on bandwidth.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may assume S3 Transfer Acceleration or Direct Connect can magically overcome a hard bandwidth cap, but neither increases the last-mile bandwidth; the only way to transfer 10 TB in under 48 hours with a 100 Mbps link is to use an offline physical device like Snowball Edge.
Detailed technical explanation
How to think about this question
Snowball Edge devices use AES-256 encryption for data at rest and in transit, with a 1 Gbps or 10 Gbps local network interface for data ingestion from the Hadoop cluster. The device is then shipped to AWS, where data is imported into S3 via the Snowball service, which automatically decrypts and validates the data. This approach is ideal for large datasets (over 10 TB) or when network constraints make online transfer impractical, as the physical shipping time (typically 2–3 days) is far less than the network transfer time.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
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 |
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this DEA-C01 question test?
Data Store Management — This question tests Data Store Management — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use AWS Snowball Edge device to transfer data offline — The on-premises Hadoop cluster has 10 TB of data to transfer, but the network bandwidth is only 100 Mbps. At 100 Mbps, the theoretical maximum transfer rate is about 12.5 MB/s, which would take approximately 10 TB / 12.5 MB/s ≈ 800,000 seconds ≈ 222 hours — far exceeding the 48-hour window. AWS Snowball Edge is an offline, physical device that bypasses network constraints entirely, allowing you to transfer the data by shipping the device, which completes within days regardless of bandwidth.
What should I do if I get this DEA-C01 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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