MLS-C01 Exploratory Data Analysis Practice Question
A data analyst needs to visualize the distribution of a numerical feature in a dataset. Which AWS service can be used to create a histogram directly from data stored in S3 without writing code?
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 QuickSight
Mazon QuickSight (Option C) because it is a business intelligence (BI) service that can connect directly to data stored in Amazon S3 and create visualizations such as histograms without requiring any coding. Amazon Athena (Option A) is an interactive query service that returns raw query results, not visualizations. Amazon SageMaker Studio (Option B) is a machine learning IDE that typically requires writing code or using notebooks to generate plots. AWS Glue (Option D) is a serverless data integration service for ETL operations, not for visualization.
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 engine, not a visualization tool.
- ✗
Amazon SageMaker Studio
Why it's wrong here
SageMaker Studio requires coding for visualizations.
- ✓
Amazon QuickSight
Why this is correct
QuickSight provides no-code visualizations like histograms.
- ✗
AWS Glue
Why it's wrong here
Glue is for ETL, not visualization.
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 |
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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.