MLS-C01 Exploratory Data Analysis Practice Question
Network Topology
A data scientist runs the AWS CLI command shown in the exhibit to list objects larger than 100 KB in an S3 bucket. The data scientist wants to understand the size distribution of these files. What is the most significant limitation of this approach for EDA?
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
✓
The command may return incomplete results if there are more than 1000 objects.
The AWS CLI `list-objects` command returns a maximum of 1000 objects by default. If the bucket contains more than 1000 objects larger than 100 KB, the command will only return the first 1000, leading to incomplete results for EDA. Option A is incorrect because the command uses `> 100000` which excludes objects exactly 100 KB, but that is not the most significant limitation. Option C is incorrect because the query syntax is valid. Option D is incorrect because the command does return the object keys (file names) as well as sizes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The command only returns objects larger than 100 KB, not equal to.
Why it's wrong here
The condition uses `>`, so it excludes exactly 100 KB, but that is not the most significant limitation.
- ✓
The command may return incomplete results if there are more than 1000 objects.
Why this is correct
S3 list-objects returns up to 1000 objects per call; pagination is required for more.
- ✗
The command uses the wrong query syntax and will fail.
Why it's wrong here
The syntax is valid for filtering with JMESPath.
- ✗
The command does not return the file names, only sizes.
Why it's wrong here
The command returns both key and size.
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.