DEA-C01 Data Operations and Support Practice Question
A data engineer needs to monitor the number of records processed by a Kinesis Data Firehose delivery stream and set an alarm if the count drops below a threshold. Which CloudWatch metric should be used?
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
✓
IncomingRecords
'IncomingRecords' counts records received by Firehose, which directly indicates processing volume. Option B is wrong because 'IncomingBytes' measures bytes, not records. Option C is wrong because 'DeliveryToS3.Success' is a success metric but measures successful deliveries, not record count. Option D is wrong because 'PutRecord.Success' is a per-API call metric for Kinesis Data Streams, not Firehose.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
IncomingRecords
Why this is correct
This metric counts the number of records sent to Firehose.
- ✗
PutRecord.Success
Why it's wrong here
This is for Kinesis Data Streams, not Firehose.
- ✗
DeliveryToS3.Success
Why it's wrong here
This indicates successful deliveries, not record count.
- ✗
IncomingBytes
Why it's wrong here
This measures bytes, not record count.
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.