- A
AWS Lambda
Lambda can be triggered directly by S3 events.
- B
AWS Step Functions
Why wrong: Step Functions would need an event source; Lambda is more direct.
- C
Amazon EventBridge
Why wrong: EventBridge can receive S3 events but requires a rule; Lambda direct trigger is simpler.
- D
Amazon Simple Queue Service (SQS)
Why wrong: SQS requires an S3 event notification to send messages, then Lambda polls SQS; extra complexity.
Question 1,207 of 1,786
DEA-C01 Data Ingestion and Transformation Practice Question
This DEA-C01 practice question tests your understanding of data ingestion and transformation. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 needs to design a data ingestion pipeline that ingests CSV files from an Amazon S3 bucket, transforms the data by adding a timestamp column, and loads it into an Amazon Redshift table. The pipeline should run automatically whenever a new file is uploaded to the S3 bucket. Which AWS service should be used to trigger the transformation?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
AWS Lambda
Option A is correct because Amazon S3 can be configured to send events directly to AWS Lambda when a new CSV file is uploaded. Lambda then executes the transformation (adding a timestamp column) and loads the data into Redshift. Option B (Step Functions) is not triggered directly by S3 events without an intermediate service like Lambda. Option C (EventBridge) can route S3 events to Lambda, but a direct S3 event notification to Lambda is simpler and more common; however, the key point is that Lambda is the direct trigger. Option D (SQS) requires a separate process to poll the queue and invoke Lambda; it is not a direct trigger.
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 Lambda
Why this is correct
Lambda can be triggered directly by S3 events.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
AWS Step Functions
Why it's wrong here
Step Functions would need an event source; Lambda is more direct.
- ✗
Amazon EventBridge
Why it's wrong here
EventBridge can receive S3 events but requires a rule; Lambda direct trigger is simpler.
- ✗
Amazon Simple Queue Service (SQS)
Why it's wrong here
SQS requires an S3 event notification to send messages, then Lambda polls SQS; extra complexity.
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.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
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.
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FAQ
Questions learners often ask
What does this DEA-C01 question test?
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 Lambda — Option A is correct because Amazon S3 can be configured to send events directly to AWS Lambda when a new CSV file is uploaded. Lambda then executes the transformation (adding a timestamp column) and loads the data into Redshift. Option B (Step Functions) is not triggered directly by S3 events without an intermediate service like Lambda. Option C (EventBridge) can route S3 events to Lambda, but a direct S3 event notification to Lambda is simpler and more common; however, the key point is that Lambda is the direct trigger. Option D (SQS) requires a separate process to poll the queue and invoke Lambda; it is not a direct trigger.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
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Last reviewed: Jun 20, 2026
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