MLS-C01 Exploratory Data Analysis Practice Question
A data scientist needs to profile a large dataset in Amazon S3 to understand its schema, data types, and quality. Which AWS service can automatically generate a data profile with statistics and visualizations?
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
✓
AWS Glue DataBrew
AWS Glue DataBrew provides data profiling capabilities, automatically generating a data profile with statistics and visualizations. Option A (Amazon Athena) is an interactive query service for analyzing data in S3 using standard SQL, but it does not generate data profiles. Option C (Amazon QuickSight) is a business analytics service for creating visualizations and dashboards, but it does not profile data automatically. Option D (Amazon Redshift) is a data warehouse, not a data profiling service.
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 a query service, not profiling.
- ✓
AWS Glue DataBrew
Why this is correct
DataBrew can profile data and generate statistics.
- ✗
Amazon QuickSight
Why it's wrong here
QuickSight is for visualization after data is prepared.
- ✗
Amazon Redshift
Why it's wrong here
Redshift is a data warehouse.
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
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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.