MLA-C01 The most likely cause of this error? Practice Question
This MLA-C01 practice question tests your understanding of the most likely cause of this error?. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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
Refer to the exhibit. You are investigating a failed SageMaker training job. The following message appears in the training job's CloudWatch Logs:
2024-08-15 14:30:45,212 sagemaker-training-toolkit ERROR ClientError:
An error occurred (ResourceLimitExceeded) when calling the CreateTrainingJob operation:
The account-level service limit for 'ml.p3.16xlarge for training job usage' is 0.
What is the most likely cause of this 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
Refer to the exhibit. You are investigating a failed SageMaker training job. The following message appears in the training job's CloudWatch Logs:
2024-08-15 14:30:45,212 sagemaker-training-toolkit ERROR ClientError:
An error occurred (ResourceLimitExceeded) when calling the CreateTrainingJob operation:
The account-level service limit for 'ml.p3.16xlarge for training job usage' is 0.
A
The account has not requested a service limit increase for the specified instance type.
A ResourceLimitExceeded error with a limit of 0 means the account needs to request a service limit increase from AWS Support.
B
The training job is configured to use Managed Spot Training and the spot market is unavailable.
Why wrong: Spot market unavailability would give a 'SpotCapacityNotAvailable' error, not a resource limit error.
C
The IAM role used for the training job does not have sufficient permissions to launch the instance.
Why wrong: An IAM permission issue would result in an 'AccessDenied' error, not 'ResourceLimitExceeded'.
D
The instance type specified is not available in the current AWS Region.
Why wrong: If the instance were unavailable, the error would be different (e.g., 'InvalidInstanceType').
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The account has not requested a service limit increase for the specified instance type.
The error indicates that the requested instance type is not available due to insufficient capacity or quota. AWS accounts have default service limits (quotas) for each instance type per region. If the account has not requested a service limit increase for the specified instance type, SageMaker cannot provision the instance for the training job, resulting in this error. This is the most common cause when the instance type is otherwise available in the region.
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 account has not requested a service limit increase for the specified instance type.
Why this is correct
A ResourceLimitExceeded error with a limit of 0 means the account needs to request a service limit increase from AWS Support.
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 training job is configured to use Managed Spot Training and the spot market is unavailable.
Why it's wrong here
Spot market unavailability would give a 'SpotCapacityNotAvailable' error, not a resource limit error.
✗
The IAM role used for the training job does not have sufficient permissions to launch the instance.
Why it's wrong here
An IAM permission issue would result in an 'AccessDenied' error, not 'ResourceLimitExceeded'.
✗
The instance type specified is not available in the current AWS Region.
Why it's wrong here
If the instance were unavailable, the error would be different (e.g., 'InvalidInstanceType').
Common exam traps
Common exam trap: answer the scenario, not the keyword
AWS often tests the distinction between 'instance type not available in region' (a regional availability issue) and 'service limit not increased' (a quota issue), leading candidates to mistakenly choose the region-based option when the error is actually due to insufficient quota.
Detailed technical explanation
How to think about this question
AWS service quotas are enforced per account per region, and SageMaker training jobs require a specific number of vCPUs and memory from the instance type. The error arises when the account's running or pending usage would exceed the quota for that instance family. This is distinct from AWS Outposts or Local Zones scenarios where instance types may genuinely be unavailable; here, the instance type exists in the region but the account lacks the quota to launch 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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
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.
Read the scenario before looking for a memorised answer.
What is the correct answer to this question?
The correct answer is: The account has not requested a service limit increase for the specified instance type. — The error indicates that the requested instance type is not available due to insufficient capacity or quota. AWS accounts have default service limits (quotas) for each instance type per region. If the account has not requested a service limit increase for the specified instance type, SageMaker cannot provision the instance for the training job, resulting in this error. This is the most common cause when the instance type is otherwise available in the region.
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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