DEA-C01 Data Ingestion and Transformation Practice Question
A data engineer needs to ingest streaming data from thousands of devices sending JSON messages via HTTP POST. The data should be stored in Amazon S3 with minimal latency and also be available for real-time analytics. Which combination of services is MOST appropriate?
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
✓
Amazon API Gateway, Amazon Kinesis Data Streams, and Kinesis Data Firehose.
It combines Amazon API Gateway to ingest HTTP POST messages, Amazon Kinesis Data Streams for real-time analytics, and Kinesis Data Firehose to deliver the data to Amazon S3 with minimal latency. Option A (DynamoDB with Streams) is meant for database change tracking, not direct HTTP streaming. Option B (SQS + Lambda) introduces latency and lacks native streaming analytics. Option C (Lambda directly via API Gateway) does not provide the buffering and streaming analytics capabilities needed.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Amazon DynamoDB with DynamoDB Streams and Lambda.
Why it's wrong here
DynamoDB is a database, not a streaming ingestion service for HTTP POST.
- ✗
Amazon SQS and AWS Lambda to write to S3.
Why it's wrong here
SQS is for decoupling, not real-time streaming analytics.
- ✗
AWS Lambda directly writing to S3 via API Gateway.
Why it's wrong here
Lambda may have concurrency limits and does not provide real-time analytics capabilities.
- ✓
Amazon API Gateway, Amazon Kinesis Data Streams, and Kinesis Data Firehose.
Why this is correct
API Gateway receives POST, sends to Kinesis for real-time analytics, and Firehose batches to S3.
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.