Quick Answer
The answer is AWS Database Migration Service (DMS). This service is specifically designed to migrate databases to AWS with minimal impact on the source, using a continuous change data capture (CDC) mechanism that allows it to perform a full load of several terabytes while keeping the source database online and responsive. On the AWS Certified Data Engineer Associate DEA-C01 exam, this question tests your ability to distinguish between data transfer services: DMS handles live database replication, whereas S3 Transfer Acceleration only speeds up uploads, Direct Connect is a dedicated network link, and Snowball is an offline physical device. A common trap is confusing DMS with a simple file transfer tool, but remember that DMS is purpose-built for schema conversion and ongoing replication from databases to S3. Memory tip: DMS = Database Migration Service, so if the source is a database, DMS is your answer.
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 company needs to ingest data from an on-premises database to Amazon S3 with minimal impact on the source database. The data volume is several TB. Which AWS service is best suited for this task?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
AWS Direct Connect
Why wrong: Direct Connect provides a dedicated network connection, not data ingestion.
AWS Snowball Edge
Why wrong: Snowball is for offline data transfer, not minimal impact on source.
AWS Database Migration Service (DMS)
DMS can migrate data from on-premises to S3 with minimal impact using CDC.
Amazon S3 Transfer Acceleration
Why wrong: Transfer Acceleration speeds up uploads but does not handle database extraction.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
AWS Database Migration Service (DMS)
AWS DMS can perform a full load with minimal impact on source. Option B (S3 Transfer Acceleration) is for speeding up uploads; Option C (Direct Connect) is a network connection; Option D (Snowball) is for offline transfer.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
AWS Direct Connect
Why it's wrong here
Direct Connect provides a dedicated network connection, not data ingestion.
AWS Snowball Edge
Why it's wrong here
Snowball is for offline data transfer, not minimal impact on source.
AWS Database Migration Service (DMS)
Why this is correct
DMS can migrate data from on-premises to S3 with minimal impact using CDC.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Amazon S3 Transfer Acceleration
Why it's wrong here
Transfer Acceleration speeds up uploads but does not handle database extraction.
Common exam traps
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
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.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
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.
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FAQ
Data Ingestion and Transformation — This question tests Data Ingestion and Transformation — Read the scenario before looking for a memorised answer..
The correct answer is: AWS Database Migration Service (DMS) — AWS DMS can perform a full load with minimal impact on source. Option B (S3 Transfer Acceleration) is for speeding up uploads; Option C (Direct Connect) is a network connection; Option D (Snowball) is for offline transfer.
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.
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 20, 2026
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.
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