MLS-C01 Data Engineering Practice Question
Which TWO AWS services are suitable for real-time stream processing?
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 Kinesis Data Analytics
Amazon Kinesis Data Analytics and AWS Lambda can process streams in real-time. AWS Glue is batch-oriented, Amazon EMR can process streams but is more batch, and Amazon Athena is for ad-hoc SQL queries on S3.
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 Athena
Why it's wrong here
Athena is for querying data at rest.
- ✗
AWS Glue
Why it's wrong here
Glue is a batch ETL service.
- ✗
Amazon EMR
Why it's wrong here
EMR typically processes batches, though it can do streaming with Spark Streaming.
- ✓
Amazon Kinesis Data Analytics
Why this is correct
Kinesis Data Analytics processes streaming data in real-time.
- ✓
AWS Lambda
Why this is correct
Lambda can process streaming data via Kinesis triggers.
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 MLS-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 MLS-C01 exam.