DEA-C01 Data Operations and Support Practice Question
A data engineer is setting up a data pipeline using Amazon Kinesis Data Firehose to deliver data to Amazon S3. The data must be transformed using an AWS Lambda function before delivery. Which THREE steps are required to configure this?
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 AWS Lambda function that transforms the data.
Options B, C, and E are correct. To configure Kinesis Data Firehose with Lambda transformation, you need to create a Lambda function that transforms the data (B), attach an IAM role to the Firehose delivery stream that allows Firehose to invoke the Lambda function (C), and configure the Firehose delivery stream to use the Lambda function as a data transformation source (E). Option A is wrong because Lambda@Edge is used with CloudFront, not Firehose. Option D is wrong because S3 event notifications are not used for Firehose transformation; they are used for other purposes like triggering Lambda on new S3 objects.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Create a Lambda@Edge function in the same Region.
Why it's wrong here
Lambda@Edge is for CloudFront, not for Firehose data transformation.
- ✓
Create an AWS Lambda function that transforms the data.
Why this is correct
A Lambda function is needed to perform the transformation logic.
- ✓
Attach an IAM role to the Firehose delivery stream that grants permission to invoke the Lambda function.
Why this is correct
Firehose needs permission to invoke the Lambda function.
- ✗
Configure an S3 event notification to trigger the Lambda function when new data arrives.
Why it's wrong here
S3 event notifications are not used for Firehose transformation; the transformation happens before delivery.
- ✓
Configure the Kinesis Data Firehose delivery stream to use the Lambda function as a data transformation source.
Why this is correct
Firehose must be configured to invoke the Lambda function for transformation.
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 |
Go deeper
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.