- A
Configure the Lambda function to write to S3 via Kinesis Data Firehose.
Why wrong: Lambda writes directly to S3, not via Firehose.
- B
Configure the Kinesis stream to send records directly to S3.
Why wrong: Kinesis Data Streams cannot directly write to S3.
- C
Set up an SQS queue as a destination for Lambda errors.
Why wrong: SQS is not required for transformation.
- D
Create an event source mapping from the Kinesis stream to the Lambda function.
Event source mapping enables Lambda to poll from Kinesis.
- E
Assign an IAM role to Lambda with permissions to read from Kinesis and write to S3.
Lambda needs permissions to access both services.
Question 1,159 of 1,786
How to Configure Lambda Event Source Mapping for Kinesis Data Streams
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 company uses Amazon Kinesis Data Streams to ingest clickstream data. The data must be transformed and stored in Amazon S3 for batch analytics. The engineer wants to use AWS Lambda for transformation. Which TWO configurations are required? (Choose two.)
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
✓
Create an event source mapping from the Kinesis stream to the Lambda function.
The correct answers are D and E. D: An event source mapping is required for Lambda to poll records from Kinesis. E: Lambda needs an IAM role with permissions to read from Kinesis and write to S3. Option A is incorrect because Lambda does not write to S3 via Firehose; Firehose is a separate service that could directly write to S3, but in this scenario, Lambda is the transformation actor and writes directly to S3. Option B is incorrect because a Kinesis stream cannot send records directly to S3; it needs a consumer or Firehose. Option C is incorrect because Lambda errors can be sent to SQS but it is not required for this setup; the question asks for required configurations.
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 the Lambda function to write to S3 via Kinesis Data Firehose.
Why it's wrong here
Lambda writes directly to S3, not via Firehose.
- ✗
Configure the Kinesis stream to send records directly to S3.
Why it's wrong here
Kinesis Data Streams cannot directly write to S3.
- ✗
Set up an SQS queue as a destination for Lambda errors.
Why it's wrong here
SQS is not required for transformation.
- ✓
Create an event source mapping from the Kinesis stream to the Lambda function.
Why this is correct
Event source mapping enables Lambda to poll from Kinesis.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Assign an IAM role to Lambda with permissions to read from Kinesis and write to S3.
Why this is correct
Lambda needs permissions to access both services.
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.
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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Data Ingestion and Transformation — study guide chapter
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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: Create an event source mapping from the Kinesis stream to the Lambda function. — The correct answers are D and E. D: An event source mapping is required for Lambda to poll records from Kinesis. E: Lambda needs an IAM role with permissions to read from Kinesis and write to S3. Option A is incorrect because Lambda does not write to S3 via Firehose; Firehose is a separate service that could directly write to S3, but in this scenario, Lambda is the transformation actor and writes directly to S3. Option B is incorrect because a Kinesis stream cannot send records directly to S3; it needs a consumer or Firehose. Option C is incorrect because Lambda errors can be sent to SQS but it is not required for this setup; the question asks for required configurations.
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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Last reviewed: Jun 20, 2026
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