The answer is AWS Snowball, because it physically transfers large database files to bypass network bandwidth limitations entirely. When migrating a 2 TB PostgreSQL database to Aurora PostgreSQL, the initial load over the internet or even a dedicated connection like Direct Connect still depends on network throughput, which can bottleneck the transfer. Snowball accelerates the DMS initial load by shipping the data on a ruggedized storage device, allowing you to load it directly into Amazon S3 and then into Aurora, sidestepping slow WAN links. On the AWS Certified Data Engineer Associate DEA-C01 exam, this question tests your understanding of hybrid migration strategies and when to use offline data transfer over online options. A common trap is choosing S3 Transfer Acceleration or Direct Connect, which still rely on network speed—Snowball is the only answer that removes the network from the equation entirely. Memory tip: think “Snowball = slow network? No ball!”
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 company uses AWS DMS to migrate a 2 TB PostgreSQL database to Amazon Aurora PostgreSQL. The migration is taking longer than expected due to the initial load. Which AWS service can be used to accelerate the initial load by transferring the database files directly?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
AWS Snowball
Option C is correct because AWS Snowball can be used to transfer large datasets physically, bypassing network constraints. Option A is wrong because S3 Transfer Acceleration speeds up uploads to S3 over the internet, but the data still goes over the network. Option B is wrong because Direct Connect provides a dedicated network connection, but the data still traverses the network. Option D is wrong because Kinesis Data Firehose is for streaming, not 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.
✓
AWS Snowball
Why this is correct
Snowball allows physical transfer of data, which can be faster than network transfer for very large datasets.
Related concept
Read the scenario before looking for a memorised answer.
✗
Amazon S3 Transfer Acceleration
Why it's wrong here
S3 Transfer Acceleration speeds up S3 uploads over the internet, but does not bypass network bandwidth limits for large datasets.
✗
AWS Direct Connect
Why it's wrong here
Direct Connect provides a dedicated network connection, but the data still transfers over the network, which may still be slow for 2 TB.
✗
Amazon Kinesis Data Firehose
Why it's wrong here
Kinesis Data Firehose is for streaming data, not for bulk database migration.
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 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: AWS Snowball — Option C is correct because AWS Snowball can be used to transfer large datasets physically, bypassing network constraints. Option A is wrong because S3 Transfer Acceleration speeds up uploads to S3 over the internet, but the data still goes over the network. Option B is wrong because Direct Connect provides a dedicated network connection, but the data still traverses the network. Option D is wrong because Kinesis Data Firehose is for streaming, not bulk data transfer.
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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