The correct answer is that the training process is generating large temporary files that fill the instance's local storage. This happens because SageMaker training instances, like the ml.m5.large with only 8 GB of EBS storage, use that local space not just for your 500 MB training data and 200 MB model, but also for temporary artifacts such as intermediate checkpoints, cached datasets, or decompressed archives during training. On the AWS Certified Machine Learning Specialty MLS-C01 exam, this question tests your understanding of SageMaker’s storage architecture and the common pitfall of confusing instance storage with memory or S3 access. A frequent trap is assuming the error is due to insufficient memory (which would raise a MemoryError) or S3 permissions (which would show AccessDenied), but the log specifically points to disk space exhaustion. Remember the mnemonic: “Temp files fill the disk, not the RAM” to distinguish storage errors from memory errors.
MLS-C01 Practice Question: Machine Learning Implementation and Operations
This MLS-C01 practice question tests your understanding of machine learning implementation and operations. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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.
```
2024-01-15 10:23:45,123 - sagemaker - INFO - Training job created
2024-01-15 10:23:46,456 - sagemaker - INFO - Starting training...
2024-01-15 10:23:50,789 - root - ERROR - OSError: [Errno 28] No space left on device
```
A training job log shows this error. The training instance is an ml.m5.large with 8 GB EBS storage. The training data is 500 MB, and the model size is expected to be 200 MB. 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.
Refer to the exhibit.
```
2024-01-15 10:23:45,123 - sagemaker - INFO - Training job created
2024-01-15 10:23:46,456 - sagemaker - INFO - Starting training...
2024-01-15 10:23:50,789 - root - ERROR - OSError: [Errno 28] No space left on device
```
A
The training data is not fully downloaded from S3 before processing
Why wrong: Would cause data loading errors, not disk full.
B
The S3 bucket does not have write permissions
Why wrong: Would show access denied errors.
C
The training instance does not have enough RAM
Why wrong: RAM would show MemoryError, not disk space.
D
The training process is generating large temporary files that fill the instance's local storage
Intermediate files, checkpoints, or logs can exceed the 8 GB storage.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The training process is generating large temporary files that fill the instance's local storage
Option C is correct: the instance's local storage is full due to temporary files or checkpoints. Option A (insufficient memory) would show MemoryError. Option B (S3 permissions) would show AccessDenied. Option D (data download) would show download errors.
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 training data is not fully downloaded from S3 before processing
Why it's wrong here
Would cause data loading errors, not disk full.
✗
The S3 bucket does not have write permissions
Why it's wrong here
Would show access denied errors.
✗
The training instance does not have enough RAM
Why it's wrong here
RAM would show MemoryError, not disk space.
✓
The training process is generating large temporary files that fill the instance's local storage
Why this is correct
Intermediate files, checkpoints, or logs can exceed the 8 GB storage.
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.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Trap categories for this question
Command / output trap
Would show access denied errors.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 MLS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Machine Learning Implementation and Operations — This question tests Machine Learning Implementation and Operations — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The training process is generating large temporary files that fill the instance's local storage — Option C is correct: the instance's local storage is full due to temporary files or checkpoints. Option A (insufficient memory) would show MemoryError. Option B (S3 permissions) would show AccessDenied. Option D (data download) would show download errors.
What should I do if I get this MLS-C01 question wrong?
Identify which MLS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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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