- A
Configure the SageMaker training job to use an IAM role with least privilege and enable network isolation
Network isolation ensures no internet egress.
- B
Enable default encryption on the S3 bucket using AWS KMS
Encrypts data at rest.
- C
Use an S3 VPC endpoint to keep traffic within the AWS network
Avoids public internet.
- D
Store the data in Amazon Redshift instead of S3
Why wrong: Redshift is not the source for SageMaker training directly.
- E
Allow internet access for the SageMaker notebook instance
Why wrong: Internet access increases exposure.
Question 439 of 1,755
MLS-C01 Data Engineering Practice Question
This MLS-C01 practice question tests your understanding of data engineering. 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.
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?
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
Option A is correct because 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.
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.
- ✓
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.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Enable default encryption on the S3 bucket using AWS KMS
Why this is correct
Encrypts data at rest.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Use an S3 VPC endpoint to keep traffic within the AWS network
Why this is correct
Avoids public internet.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
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.
Common exam traps
Common exam trap: answer the scenario, not the keyword
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.
Detailed technical explanation
How to think about this question
Under the hood, SageMaker training jobs use VPC networking to route traffic; enabling network isolation sets the EnableNetworkIsolation parameter to true, which disables internet access and forces all traffic through the VPC. When combined with an S3 VPC endpoint, data flows over the AWS backbone using AWS PrivateLink, avoiding the public internet and ensuring encryption in transit via TLS. For encryption at rest, enabling default S3 bucket encryption with AWS KMS (SSE-KMS) automatically encrypts objects upon upload, and SageMaker can access them using the IAM role's kms:Decrypt permission.
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?
Data Engineering — This question tests Data Engineering — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Configure the SageMaker training job to use an IAM role with least privilege and enable network isolation — Option A is correct because 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.
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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