The answer is to use an AWS Snowball Edge device for physically transferring the data. This is correct because transferring 50 TB over a 100 Mbps connection would take approximately 50 days, far exceeding the one-week requirement, whereas Snowball Edge bypasses network limitations entirely by shipping the data on a ruggedized storage appliance. On the AWS Certified Machine Learning Specialty MLS-C01 exam, this scenario tests your understanding of when to choose offline data transfer over online methods, often appearing in questions about migrating large historical datasets for model training. A common trap is assuming DataSync or S3 Transfer Acceleration can compensate for severe bandwidth constraints, but neither can overcome the fundamental physics of a slow pipe. Remember the memory tip: “When the pipe is too slow, let the truck roll”—if bandwidth cannot meet the deadline, Snowball is the only viable solution.
MLS-C01 Data Engineering Practice Question
This MLS-C01 practice question tests your understanding of data engineering. 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 50 TB of historical data from an on-premises Hadoop cluster to Amazon S3. The on-premises network has a 100 Mbps connection to AWS. The transfer must be completed within one week. Which approach should the engineer use?
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 physically transfer the data.
AWS Snowball Edge is a physical device that can handle large data volumes over slow networks. 50 TB over 100 Mbps would take about 50 days, exceeding the one-week requirement. Option B is wrong because AWS DataSync still uses the network. Option C is wrong because S3 Transfer Acceleration improves speed but not enough. Option D is wrong because VPN is not designed for bulk data transfer.
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 Snowball Edge device to physically transfer the data.
Why this is correct
Snowball Edge can handle large data volumes without network limitations.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use Amazon S3 Transfer Acceleration.
Why it's wrong here
Acceleration improves speed but not enough for 50 TB in a week.
✗
Use AWS DataSync to transfer the data over the network.
Why it's wrong here
DataSync uses network; 50 TB over 100 Mbps would take ~50 days.
✗
Use multiple concurrent AWS CLI copy commands over VPN.
Why it's wrong here
Still limited by network bandwidth; not sufficient.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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.
What to study next
Got this wrong? Here's your next step.
Identify which MLS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Data Engineering — This question tests Data Engineering — 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 physically transfer the data. — AWS Snowball Edge is a physical device that can handle large data volumes over slow networks. 50 TB over 100 Mbps would take about 50 days, exceeding the one-week requirement. Option B is wrong because AWS DataSync still uses the network. Option C is wrong because S3 Transfer Acceleration improves speed but not enough. Option D is wrong because VPN is not designed for bulk data transfer.
What should I do if I get this MLS-C01 question wrong?
Identify which MLS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A data engineer needs to transfer 50 TB of historical data from an on-premises HDFS cluster to Amazon S3. The company has a 1 Gbps internet connection. Which service would complete the transfer in the shortest time?
easy
✓ A.AWS Snowball
B.Amazon S3 Transfer Acceleration
C.AWS Direct Connect
D.AWS DataSync
Why A: AWS Snowball is a physical device that can transfer large amounts of data faster than internet due to bandwidth limitations. DataSync is for network transfers. Direct Connect helps but still limited by bandwidth. S3 Transfer Acceleration speeds up internet transfers but cannot match physical shipment for 50 TB.
Variation 2. A data engineer needs to transfer 50 TB of historical data from an on-premises Hadoop cluster to Amazon S3. The on-premises network has a 1 Gbps connection to AWS. The transfer must be completed within 10 days. What is the MOST efficient approach?
easy
✓ A.Use AWS Snowball Edge to physically ship the data.
B.Use Amazon S3 Transfer Acceleration to speed up the upload.
C.Use AWS DataSync over the existing network connection.
D.Set up a VPN connection and use multi-part upload directly to S3.
Why A: Option C is correct because AWS Snowball Edge can transfer large volumes faster than a network, especially with limited bandwidth. Option A is wrong because a 1 Gbps line would take over 5 days for 50 TB, but may be unreliable. Option B is wrong because 50 TB over VPN would be very slow. Option D is wrong because AWS DataSync is network-based and limited by bandwidth.
Variation 3. A data engineer needs to transfer 50 TB of historical data from an on-premises Hadoop cluster to Amazon S3. The company has a 1 Gbps internet connection and wants to complete the transfer within 5 days. What is the MOST cost-effective and reliable solution?
medium
✓ A.Use AWS Snowball Edge device to physically ship the data
B.Use S3 multipart upload over the internet
C.Set up AWS Direct Connect and transfer over the dedicated line
D.Use S3 Transfer Acceleration to speed up the transfer
Why A: AWS Snowball Edge is a physical device that can transfer large amounts of data faster than over the internet. Option A is wrong because the internet connection would take about 5 days at full bandwidth, but is unreliable and may incur high costs. Option B is wrong because Direct Connect requires setup time and ongoing costs. Option D is wrong because S3 Transfer Acceleration may help but still relies on internet.
Variation 4. A data engineer needs to transfer 50 TB of historical data from an on-premises Hadoop cluster to Amazon S3. The company has a 100 Mbps internet connection and a tight deadline of two weeks. Which AWS service should the engineer use to transfer the data most efficiently?
easy
A.AWS Storage Gateway (Volume Gateway)
✓ B.AWS Snowball Edge
C.Amazon S3 Transfer Acceleration
D.AWS DataSync over the internet
Why B: Option B is correct. AWS Snowball Edge is a physical device that can transfer large amounts of data faster than over the internet. Option A is wrong because AWS DataSync over internet would be too slow (100 Mbps). Option C is wrong because AWS Storage Gateway is for ongoing hybrid storage, not bulk transfer. Option D is wrong because Amazon S3 Transfer Acceleration improves speed but still over internet, not enough for 50 TB in two weeks over 100 Mbps.
Variation 5. A data engineer needs to transfer 50 TB of historical data from an on-premises Hadoop cluster to Amazon S3. The company has a 100 Mbps internet connection and the data must be transferred within 5 days. Which AWS service is best suited for this task?
easy
A.AWS DataSync
✓ B.AWS Snowball Edge
C.Amazon S3 Transfer Acceleration
D.AWS Storage Gateway
Why B: Option C is correct because AWS Snowball Edge is a physical device that can transfer large amounts of data over a network faster than a 100 Mbps connection. Option A is wrong because AWS DataSync is designed for network transfers, but 100 Mbps would take much longer than 5 days. Option B is wrong because AWS Storage Gateway is for ongoing hybrid cloud storage, not large-scale data migration. Option D is wrong because S3 Transfer Acceleration speeds up internet transfers but still limited by the 100 Mbps connection.
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