- A
Use a VPC to isolate the SageMaker training job
Network isolation.
- B
Apply an S3 bucket policy that denies all access except from the SageMaker service
Why wrong: SageMaker uses IAM roles, not bucket policies directly.
- C
Attach an EBS volume for storing training data
Why wrong: Training data comes from S3, not EBS.
- D
Enable server-side encryption on the S3 bucket
Encrypts data at rest.
- E
Use an IAM role with least privilege permissions
Minimizes access.
Question 84 of 1,755
Ensuring Data Security in SageMaker Training with S3
This MLS-C01 practice question tests your understanding of machine learning implementation and operations. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which THREE actions should be taken to ensure data security when training a model using Amazon SageMaker with data stored in Amazon S3? (Choose 3.)
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
✓
Use a VPC to isolate the SageMaker training job
Option A is correct because using a VPC to isolate the SageMaker training job ensures that the training instance runs within a private network, preventing direct internet access and allowing traffic to flow only through controlled network interfaces. This reduces the attack surface and helps meet compliance requirements for data security.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Use a VPC to isolate the SageMaker training job
Why this is correct
Network isolation.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Apply an S3 bucket policy that denies all access except from the SageMaker service
Why it's wrong here
SageMaker uses IAM roles, not bucket policies directly.
- ✗
Attach an EBS volume for storing training data
Why it's wrong here
Training data comes from S3, not EBS.
- ✓
Enable server-side encryption on the S3 bucket
Why this is correct
Encrypts data at rest.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Use an IAM role with least privilege permissions
Why this is correct
Minimizes access.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse service-level bucket policies (like 'Deny all except SageMaker service') with IAM role-based access, leading them to select option B, which is technically invalid because SageMaker does not have a service principal for S3 access.
Detailed technical explanation
How to think about this question
Under the hood, SageMaker training jobs use the VPC's subnet and security group to route traffic to S3 via VPC endpoints (Gateway or Interface endpoints), which keeps traffic within the AWS network and avoids the public internet. Server-side encryption (SSE-S3 or SSE-KMS) ensures data at rest is encrypted, and IAM roles with least privilege enforce the principle of minimal permissions, which is critical for audit trails and reducing blast radius in multi-tenant environments.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
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 |
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this MLS-C01 question test?
Machine Learning Implementation and Operations — This question tests Machine Learning Implementation and Operations — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use a VPC to isolate the SageMaker training job — Option A is correct because using a VPC to isolate the SageMaker training job ensures that the training instance runs within a private network, preventing direct internet access and allowing traffic to flow only through controlled network interfaces. This reduces the attack surface and helps meet compliance requirements for data security.
What should I do if I get this MLS-C01 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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.
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