The answer is AWS DataSync, the most suitable service to transfer many small files from on-premises to S3 because it is purpose-built for efficiently handling millions of small objects while minimizing operational overhead. DataSync automates the entire transfer process, including incremental replication and validation, directly from an FTP server to S3 without requiring custom scripts or additional infrastructure. On the AWS Certified Data Engineer Associate DEA-C01 exam, this scenario tests your ability to distinguish between network acceleration tools like S3 Transfer Acceleration, which only speeds up existing S3 API calls, and dedicated data movement services. A common trap is choosing Direct Connect, but that merely provides a private network link and still needs a transfer agent like DataSync to actually move the files. Remember the mnemonic: “DataSync does the heavy lifting for small files; other services just pave the road.”
DEA-C01 Data Ingestion and Transformation Practice Question
This DEA-C01 practice question tests your understanding of data ingestion and transformation. 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 is designing a data ingestion pipeline to load millions of small JSON files from an on-premises FTP server into Amazon S3. The pipeline should minimize cost and operational overhead. Which approach is most suitable?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Deploy AWS DataSync to transfer files from the FTP server to S3
Option C is correct because AWS DataSync can transfer data from on-premises to S3 efficiently, handling many small files. Option A is wrong because S3 Transfer Acceleration speeds up transfers over long distances but requires S3 API access. Option B is wrong because Direct Connect provides dedicated network but still needs a transfer mechanism. Option D is wrong because Snowball Edge is for large data volumes and incurs shipping delays.
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 S3 Transfer Acceleration to upload files directly from the FTP server
Deploy AWS DataSync to transfer files from the FTP server to S3
Why this is correct
AWS DataSync is designed for efficient data transfer from on-premises to AWS, handling small files well with minimal operational overhead.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use AWS Snowball Edge to ship the data to AWS
Why it's wrong here
Snowball is for large data volumes and has shipping delays; not suitable for ongoing ingestion.
✗
Set up an AWS Direct Connect connection and use AWS CLI to copy files
Why it's wrong here
Direct Connect requires network setup and CLI scripting; not the most cost-effective for small files.
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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
What to study next
Got this wrong? Here's your next step.
Identify which DEA-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 Ingestion and Transformation — This question tests Data Ingestion and Transformation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Deploy AWS DataSync to transfer files from the FTP server to S3 — Option C is correct because AWS DataSync can transfer data from on-premises to S3 efficiently, handling many small files. Option A is wrong because S3 Transfer Acceleration speeds up transfers over long distances but requires S3 API access. Option B is wrong because Direct Connect provides dedicated network but still needs a transfer mechanism. Option D is wrong because Snowball Edge is for large data volumes and incurs shipping delays.
What should I do if I get this DEA-C01 question wrong?
Identify which DEA-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.
Are there clue words in this question I should notice?
Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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