- A
Use AWS DataSync to copy data to the training account's S3.
Why wrong: DataSync is for large data transfers, not for providing real-time access.
- B
Create an IAM role in the source account and assume it from the training account.
Why wrong: This handles cross-account access but doesn't satisfy the VPC condition.
- C
Use an S3 VPC endpoint in the training job's VPC and attach a bucket policy that allows the VPC.
Why wrong: This addresses the VPC condition but not the cross-account IAM permission.
- D
Use cross-account access with an IAM role and add a bucket policy allowing the training job's VPC.
This combines IAM role assumption and VPC condition to meet both requirements.
Question 687 of 1,000
MLA-C01 Practice Question: ML Solution Monitoring, Maintenance and Security
This MLA-C01 practice question tests your understanding of ml solution monitoring, maintenance and security. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 uses SageMaker training jobs that need to access data in an S3 bucket in a different AWS account. The bucket uses a bucket policy that allows access only from a specific VPC. How should they configure the training job?
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 cross-account access with an IAM role and add a bucket policy allowing the training job's VPC.
Option D is correct because the training job in Account A needs to access an S3 bucket in Account B that is restricted to a specific VPC. This requires both cross-account IAM role trust (so the training job can assume a role in Account B) and a bucket policy that explicitly allows access from the VPC where the training job runs. Without the VPC condition in the bucket policy, the S3 service would deny requests even if the IAM role is valid, because the bucket policy enforces the VPC restriction.
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 AWS DataSync to copy data to the training account's S3.
Why it's wrong here
DataSync is for large data transfers, not for providing real-time access.
- ✗
Create an IAM role in the source account and assume it from the training account.
Why it's wrong here
This handles cross-account access but doesn't satisfy the VPC condition.
- ✗
Use an S3 VPC endpoint in the training job's VPC and attach a bucket policy that allows the VPC.
Why it's wrong here
This addresses the VPC condition but not the cross-account IAM permission.
- ✓
Use cross-account access with an IAM role and add a bucket policy allowing the training job's VPC.
Why this is correct
This combines IAM role assumption and VPC condition to meet both requirements.
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 think a cross-account IAM role alone is sufficient, forgetting that the bucket policy's VPC restriction is a separate, mandatory condition that must be explicitly satisfied, and that the VPC endpoint alone does not grant cross-account permissions.
Detailed technical explanation
How to think about this question
Under the hood, S3 bucket policies with VPC conditions use the `aws:SourceVpc` condition key, which checks the VPC ID from which the request originates. When a SageMaker training job runs in a VPC, its traffic to S3 goes through the VPC endpoint, and the source VPC ID is included in the request context. For cross-account access, the training account's IAM role must be trusted by the source account's IAM role (via a trust policy), and the bucket policy must grant `s3:GetObject` (or other actions) with a condition that `aws:SourceVpc` equals the training job's VPC ID. A common subtlety is that the VPC endpoint itself must have a policy that allows the training account's principal, or the endpoint policy might block the request even if the bucket policy allows it.
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
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FAQ
Questions learners often ask
What does this MLA-C01 question test?
ML Solution Monitoring, Maintenance and Security — This question tests ML Solution Monitoring, Maintenance and Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use cross-account access with an IAM role and add a bucket policy allowing the training job's VPC. — Option D is correct because the training job in Account A needs to access an S3 bucket in Account B that is restricted to a specific VPC. This requires both cross-account IAM role trust (so the training job can assume a role in Account B) and a bucket policy that explicitly allows access from the VPC where the training job runs. Without the VPC condition in the bucket policy, the S3 service would deny requests even if the IAM role is valid, because the bucket policy enforces the VPC restriction.
What should I do if I get this MLA-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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
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Last reviewed: Jul 4, 2026
This MLA-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 MLA-C01 exam.
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