- A
Use an IAM role with sts:AssumeRole for invocation.
Why wrong: Invocation typically uses IAM permissions on the user/role directly, not sts:AssumeRole.
- B
Attach a resource-based policy to the endpoint.
Resource-based policies on SageMaker endpoints allow you to specify which IAM principals can invoke the endpoint.
- C
Enable AWS WAF on the endpoint.
Why wrong: AWS WAF is not supported directly on SageMaker endpoints.
- D
Use AWS CloudTrail to log all invocations.
Why wrong: CloudTrail provides auditing, not access control.
- E
Configure the endpoint to be private within a VPC and use VPC endpoints.
Placing the endpoint in a private subnet and using VPC endpoints reduces exposure to the public internet.
Question 180 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. 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 secure access to a SageMaker real-time endpoint. Which TWO actions should be taken? (Select 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
✓
Attach a resource-based policy to the endpoint.
Option B is correct because SageMaker real-time endpoints support resource-based policies, which allow you to control access at the endpoint level by specifying which IAM principals can invoke the endpoint. This is similar to how you attach a policy to an S3 bucket or an SQS queue, providing granular access control without requiring the caller to assume a role.
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 an IAM role with sts:AssumeRole for invocation.
Why it's wrong here
Invocation typically uses IAM permissions on the user/role directly, not sts:AssumeRole.
- ✓
Attach a resource-based policy to the endpoint.
Why this is correct
Resource-based policies on SageMaker endpoints allow you to specify which IAM principals can invoke the endpoint.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Enable AWS WAF on the endpoint.
Why it's wrong here
AWS WAF is not supported directly on SageMaker endpoints.
- ✗
Use AWS CloudTrail to log all invocations.
Why it's wrong here
CloudTrail provides auditing, not access control.
- ✓
Configure the endpoint to be private within a VPC and use VPC endpoints.
Why this is correct
Placing the endpoint in a private subnet and using VPC endpoints reduces exposure to the public internet.
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 sts:AssumeRole with direct invocation permissions, or think that AWS WAF can be applied to any AWS service endpoint, when in fact SageMaker endpoints are not supported by WAF.
Detailed technical explanation
How to think about this question
Resource-based policies on SageMaker endpoints are evaluated at the time of invocation, allowing you to grant cross-account access without needing to create IAM roles in the caller's account. Under the hood, the endpoint's policy is attached to the endpoint resource and is evaluated by the SageMaker service when an InvokeEndpoint request is made, using the caller's IAM principal identity. In a real-world scenario, a company might use a resource-based policy to allow a partner's AWS account to invoke an endpoint for inference while keeping the endpoint private within a VPC.
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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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ML Solution Monitoring, Maintenance and Security — study guide chapter
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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: Attach a resource-based policy to the endpoint. — Option B is correct because SageMaker real-time endpoints support resource-based policies, which allow you to control access at the endpoint level by specifying which IAM principals can invoke the endpoint. This is similar to how you attach a policy to an S3 bucket or an SQS queue, providing granular access control without requiring the caller to assume a role.
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.
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Last reviewed: Jul 4, 2026
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