MLS-C01 Practice Question: Machine Learning Implementation and Operations
A company is using Amazon SageMaker to train a machine learning model. The training job is configured to use the File mode to download data from S3 to the training instances. The training data is stored in a single S3 bucket with multiple prefixes. Which TWO actions are required to ensure the training job can access the data? (Choose TWO.)
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
✓
Grant the SageMaker execution role s3:GetObject permission for the data bucket.
Options A and C are correct. Option A: The SageMaker execution role must have the s3:GetObject permission for the data bucket to read the training data. Option C: When using File mode, the training job must specify the S3 data channel with the correct prefix to indicate the location of the data. Option B is incorrect because Pipe mode is not required for File mode. Option D is incorrect because concatenating all data into a single file is unnecessary for File mode. Option E is incorrect because File mode does not require RecordIO-protobuf format.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Grant the SageMaker execution role s3:GetObject permission for the data bucket.
Why this is correct
Needed to read objects.
- ✗
Configure the training job to use Pipe mode.
Why it's wrong here
Pipe mode is not required.
- ✓
Specify the S3 data channel with the correct prefix.
Why this is correct
Channel must point to the data location.
- ✗
Concatenate all data files into a single file.
Why it's wrong here
File mode can read multiple files.
- ✗
Convert the data to RecordIO-protobuf format.
Why it's wrong here
RecordIO is for Pipe mode, not File mode.
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.