The answer is to increase the bandwidth limit in the DataSync task settings. This is correct because AWS DataSync uses a default bandwidth limit to prevent saturating your network, but when you need faster datasync transfer speed optimization for a tight nightly window, raising that cap allows the service to consume more available network capacity, directly accelerating the data flow from your on-premises database to Amazon S3. On the AWS Certified Data Engineer Associate DEA-C01 exam, this question tests your understanding of DataSync’s throttling controls versus alternative solutions like S3 Transfer Acceleration, which only optimizes the cloud-side path and does not address an on-premises bandwidth bottleneck. A common trap is confusing schedule frequency with transfer speed—reducing the interval does not make each transfer finish faster. Remember the memory tip: “Limit up, speed up” to recall that increasing the bandwidth limit is the direct lever for faster completion.
DEA-C01 Data Ingestion and Transformation Practice Question
This DEA-C01 practice question tests your understanding of data ingestion and transformation. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 ingesting data from an on-premises database to Amazon S3 using AWS DataSync. The data transfer is scheduled to run daily at midnight. The engineer notices that the transfer takes longer than expected and sometimes does not complete before the next scheduled task. What should the engineer do to ensure the transfer completes within the window?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Increase the bandwidth limit in the DataSync task settings.
Option C is correct because increasing the bandwidth limit allows DataSync to use more network capacity, speeding up the transfer. Option A is wrong because reducing the schedule frequency does not solve the completion time issue. Option B is wrong because changing to S3 Transfer Acceleration adds cost but may not help if the bottleneck is on-premises bandwidth. Option D is wrong because decreasing the limit would make it slower.
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.
✓
Increase the bandwidth limit in the DataSync task settings.
Why this is correct
Higher bandwidth limit allows faster data transfer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Decrease the bandwidth limit to reduce network congestion.
Why it's wrong here
Decreasing limit would make transfer slower.
✗
Increase the schedule frequency to every 12 hours.
Why it's wrong here
More frequent schedules could overlap and worsen the issue.
✗
Use S3 Transfer Acceleration instead of DataSync.
Why it's wrong here
Transfer Acceleration improves speed over long distances but not on-premises bandwidth.
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: Increase the bandwidth limit in the DataSync task settings. — Option C is correct because increasing the bandwidth limit allows DataSync to use more network capacity, speeding up the transfer. Option A is wrong because reducing the schedule frequency does not solve the completion time issue. Option B is wrong because changing to S3 Transfer Acceleration adds cost but may not help if the bottleneck is on-premises bandwidth. Option D is wrong because decreasing the limit would make it slower.
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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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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.
Question Discussion
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