The answer is that the IAM role for the endpoint lacks the s3:PutObject permission. This is the most likely cause because when troubleshooting SageMaker data capture, you must verify that the execution role attached to the endpoint has explicit write access to the destination S3 bucket; the data capture configuration may show a Running status and a valid sampling percentage, but without s3:PutObject, the service cannot deliver the captured inference records. On the AWS Certified Machine Learning Engineer Associate MLA-C01 exam, this scenario tests your understanding that data capture is a two-part setup—configuration alone is insufficient if the underlying IAM permissions are missing. A common trap is assuming a Running status means data is being written, when in fact it only indicates the capture process is active. Remember the memory tip: "Running doesn't mean writing"—always check the role’s S3 write permissions first when no data appears in the bucket.
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.
Network Topology
Refer to the exhibit. A team has configured data capture for a SageMaker endpoint. The endpoint is returning predictions but no captured data appears in the S3 bucket. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The IAM role for the endpoint does not have s3:PutObject permission.
The data capture configuration shows CurrentCaptureStatus as 'Running' and sampling percentage at 50%. Most likely the IAM role attached to the endpoint does not have s3:PutObject permission for the destination bucket.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
The InitialSamplingPercentage is too low.
Why it's wrong here
50% sampling should produce some data unless no requests are captured.
✓
The IAM role for the endpoint does not have s3:PutObject permission.
Why this is correct
Without write permission, captured data cannot be written to S3.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
The capture status is 'Configured' but not 'Running'.
Why it's wrong here
The status shows 'Running', so it is active.
✗
The endpoint is not receiving any traffic.
Why it's wrong here
The endpoint is returning predictions, so it is receiving traffic.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Trap categories for this question
Command / output trap
The status shows 'Running', so it is active.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related MLA-C01 NAT questions on configuration and troubleshooting.
ML Solution Monitoring, Maintenance and Security — This question tests ML Solution Monitoring, Maintenance and Security — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: The IAM role for the endpoint does not have s3:PutObject permission. — The data capture configuration shows CurrentCaptureStatus as 'Running' and sampling percentage at 50%. Most likely the IAM role attached to the endpoint does not have s3:PutObject permission for the destination bucket.
What should I do if I get this MLA-C01 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related MLA-C01 NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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