DEA-C01 Data Ingestion and Transformation Practice Question
This DEA-C01 practice question tests your understanding of data ingestion and transformation. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 is building a data lake on S3. They have a large volume of CSV files (hundreds of GB) in a source bucket. They need to convert them to Parquet, partition by date, and ensure the data is encrypted at rest with SSE-KMS. The pipeline must be triggered automatically when new files arrive. Which THREE steps should be part of the solution? (Choose THREE.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure S3 Event Notification to send events to an SQS queue
Option A (S3 Event Notification to SQS) can trigger the pipeline. Option C (Glue ETL with partition pruning) can convert to Parquet and partition. Option D (KMS key with s3:PutObject) ensures SSE-KMS. Option B (Athena CTAS) is not triggered by events. Option E (Kinesis) is for streaming.
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.
✓
Configure S3 Event Notification to send events to an SQS queue
Why this is correct
SQS can buffer events and trigger a Lambda or Step Functions workflow.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use Amazon Kinesis Data Firehose to ingest new files
Why it's wrong here
Firehose is for streaming data, not for processing existing CSV files.
✓
Create an AWS Glue ETL job that converts to Parquet and partitions by date
Why this is correct
Glue ETL can handle the conversion and partitioning.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use Amazon Athena CTAS query to convert files in batch
Why it's wrong here
CTAS is not event-driven; it requires manual or scheduled execution.
✓
Configure the Glue job to use a KMS key for server-side encryption in S3
Why this is correct
The job should write with SSE-KMS enabled via the S3 client configuration.
Related concept
Read the scenario before looking for a memorised answer.
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: Configure S3 Event Notification to send events to an SQS queue — Option A (S3 Event Notification to SQS) can trigger the pipeline. Option C (Glue ETL with partition pruning) can convert to Parquet and partition. Option D (KMS key with s3:PutObject) ensures SSE-KMS. Option B (Athena CTAS) is not triggered by events. Option E (Kinesis) is for streaming.
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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Question Discussion
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