MLS-C01 Data Engineering Practice Question
A company wants to use Amazon SageMaker to train a model using data stored in Amazon S3. The data is sensitive and must be encrypted at rest and in transit. Which THREE steps should be taken to ensure data security?
⚠ Common exam trap
The trap here is that candidates might think storing data in a different service like Redshift or enabling internet access for notebooks is necessary, but the exam tests the understanding that S3 with VPC endpoints and network isolation provide sufficient security without overcomplicating the architecture.
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
✓
Configure the SageMaker training job to use an IAM role with least privilege and enable network isolation
Configuring the SageMaker training job with an IAM role that follows least privilege ensures that only necessary permissions are granted, reducing the risk of unauthorized access. Enabling network isolation prevents the training job from accessing the internet, which mitigates data exfiltration risks and ensures that data remains within the controlled AWS environment.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Configure the SageMaker training job to use an IAM role with least privilege and enable network isolation
Why this is correct
Network isolation ensures no internet egress.
- ✓
Enable default encryption on the S3 bucket using AWS KMS
Why this is correct
Encrypts data at rest.
- ✓
Use an S3 VPC endpoint to keep traffic within the AWS network
Why this is correct
Avoids public internet.
- ✗
Store the data in Amazon Redshift instead of S3
Why it's wrong here
Redshift is not the source for SageMaker training directly.
- ✗
Allow internet access for the SageMaker notebook instance
Why it's wrong here
Internet access increases exposure.
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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JA
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.