DEA-C01 Data Ingestion and Transformation Practice Question
A company uses Amazon Kinesis Data Firehose to deliver data to an Amazon S3 bucket. The data delivery is delayed by up to 5 minutes. The engineer wants to reduce the delay to under 1 minute. Which parameter should be adjusted?
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
✓
Decrease the buffer interval in Kinesis Data Firehose.
Decreasing the buffer interval reduces the time Kinesis Data Firehose waits before delivering a batch, thus lowering latency to under 1 minute. Option A is incorrect because error logging to CloudWatch does not affect delivery timing. Option B is incorrect because increasing the buffer size would actually increase the delay as Firehose waits for more data to accumulate. Option C is incorrect because enabling data compression reduces storage size but has no impact on delivery frequency.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enable error logging to CloudWatch.
Why it's wrong here
Logging does not reduce latency.
- ✗
Increase the buffer size in Kinesis Data Firehose.
Why it's wrong here
Increasing buffer size increases latency.
- ✗
Enable data compression.
Why it's wrong here
Compression affects storage size, not delivery timing.
- ✓
Decrease the buffer interval in Kinesis Data Firehose.
Why this is correct
Lower buffer interval triggers deliveries more frequently.
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
Related to this question
About these practice questions
Courseiva writes every DEA-C01 question from scratch — 1,711 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
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.