DEA-C01 Data Operations and Support Practice Question
A data engineer notices that an Amazon Kinesis Data Firehose delivery stream is failing to deliver data to an Amazon S3 bucket. The engineer verifies that the S3 bucket exists and that the IAM role attached to the delivery stream has the necessary permissions. What is the MOST likely cause of the failure?
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
✓
No data is being written to the Kinesis Data Firehose delivery stream.
If no data is written to the stream, Firehose has nothing to deliver. Option A is wrong because CloudWatch Logs is for monitoring, not for storing delivery data. Option B is wrong because insufficient permissions would cause an access denied error. Option D is wrong because delivery streams typically use S3 as a destination, not Kinesis Data Streams.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The delivery stream is configured to deliver to Amazon CloudWatch Logs.
Why it's wrong here
CloudWatch Logs is a destination, but the issue is no data being sent.
- ✗
The IAM role does not have permissions to write to the S3 bucket.
Why it's wrong here
The engineer verified permissions are correct.
- ✓
No data is being written to the Kinesis Data Firehose delivery stream.
Why this is correct
If no data is put into the stream, it cannot deliver to S3.
- ✗
The delivery stream is configured to deliver to Amazon Kinesis Data Streams instead of S3.
Why it's wrong here
Firehose can deliver to S3 directly.
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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JA
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.