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.
Exhibit
[ERROR] 2024-03-15 10:23:45,123 - sagemaker - 1321 - root - ERROR - InvocationException: Received response status code 404 from container. Error: ResourceNotFoundException: Model 'my-model-v2' is not found. You may be using an outdated endpoint configuration.
Refer to the exhibit. A data engineer investigates why a SageMaker endpoint is returning errors. The endpoint configuration has been updated to point to a new model version. What is the MOST likely cause of the error?
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.
Exhibit
[ERROR] 2024-03-15 10:23:45,123 - sagemaker - 1321 - root - ERROR - InvocationException: Received response status code 404 from container. Error: ResourceNotFoundException: Model 'my-model-v2' is not found. You may be using an outdated endpoint configuration.
A
The endpoint instance type is insufficient.
Why wrong: Insufficient instances would lead to timeouts or throttling, not a 404.
B
The container image for the new model is not compatible.
Why wrong: Incompatible image would cause a different error, such as container startup failure.
C
The IAM role does not have permission to invoke the endpoint.
Why wrong: Permission errors would result in 403 or 5xx, not 404.
D
The endpoint is still using the previous configuration.
Correct. The endpoint configuration likely still points to an older model name that does not exist.
E
The new model artifact is not properly uploaded to S3.
Why wrong: If the artifact were missing, the error would be about accessing S3, not a 404 from the container.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The endpoint is still using the previous configuration.
When a SageMaker endpoint configuration is updated to point to a new model version, the endpoint itself does not automatically switch to the new configuration unless a subsequent UpdateEndpoint or Deploy call is made. The endpoint continues serving the previous model until the update is explicitly applied, so the errors are most likely caused by the endpoint still using the old configuration.
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.
✗
The endpoint instance type is insufficient.
Why it's wrong here
Insufficient instances would lead to timeouts or throttling, not a 404.
✗
The container image for the new model is not compatible.
Why it's wrong here
Incompatible image would cause a different error, such as container startup failure.
✗
The IAM role does not have permission to invoke the endpoint.
Why it's wrong here
Permission errors would result in 403 or 5xx, not 404.
✓
The endpoint is still using the previous configuration.
Why this is correct
Correct. The endpoint configuration likely still points to an older model name that does not exist.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The new model artifact is not properly uploaded to S3.
Why it's wrong here
If the artifact were missing, the error would be about accessing S3, not a 404 from the container.
Common exam traps
Common exam trap: answer the scenario, not the keyword
AWS often tests the distinction between updating an endpoint configuration and actually deploying that configuration to the endpoint, leading candidates to assume that changing the configuration automatically updates the endpoint.
Detailed technical explanation
How to think about this question
SageMaker endpoints use a two-step process: first, you create or update an endpoint configuration (which defines the model, instance type, and other settings), then you must call UpdateEndpoint to apply that configuration to the running endpoint. Until UpdateEndpoint is invoked, the endpoint continues using the previous configuration, even if the new model artifact is valid and the container is compatible. This is a common source of confusion because the AWS console may show the new configuration as 'current' in the endpoint configuration list, but the endpoint's actual deployed configuration remains unchanged.
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.
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.
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: The endpoint is still using the previous configuration. — When a SageMaker endpoint configuration is updated to point to a new model version, the endpoint itself does not automatically switch to the new configuration unless a subsequent UpdateEndpoint or Deploy call is made. The endpoint continues serving the previous model until the update is explicitly applied, so the errors are most likely caused by the endpoint still using the old configuration.
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.
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?
Read the scenario before looking for a memorised answer.
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Question Discussion
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