MLS-C01 Exploratory Data Analysis Practice Question
This MLS-C01 practice question tests your understanding of exploratory data analysis. 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.
Exhibit
Refer to the exhibit. Consider the following IAM policy attached to a SageMaker notebook instance:
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": [
"s3:GetObject",
"s3:ListBucket"
],
"Resource": [
"arn:aws:s3:::my-training-data/*",
"arn:aws:s3:::my-training-data"
]
},
{
"Effect": "Allow",
"Action": [
"athena:StartQueryExecution",
"athena:GetQueryResults"
],
"Resource": "*"
}
]
}
The exhibit shows an IAM policy for a SageMaker notebook. A data scientist wants to use the notebook to run an Athena query and then load the results into a pandas DataFrame. Which action is NOT possible with this policy?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "NOT"
Why it matters: Negative qualifier — you are looking for the one option that does NOT apply. Most options will be true; only one is false for this scenario.
Exhibit
Refer to the exhibit. Consider the following IAM policy attached to a SageMaker notebook instance:
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": [
"s3:GetObject",
"s3:ListBucket"
],
"Resource": [
"arn:aws:s3:::my-training-data/*",
"arn:aws:s3:::my-training-data"
]
},
{
"Effect": "Allow",
"Action": [
"athena:StartQueryExecution",
"athena:GetQueryResults"
],
"Resource": "*"
}
]
}
A
Read the Athena query results from the output S3 location
The policy only allows read on my-training-data, not the Athena output bucket.
B
Start an Athena query execution
Why wrong: Athena actions are allowed.
C
Read a specific object from the my-training-data bucket
Why wrong: s3:GetObject is allowed on my-training-data.
D
List objects in the my-training-data bucket
Why wrong: s3:ListBucket is allowed on my-training-data.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Read the Athena query results from the output S3 location
The policy grants s3:GetObject on the 'my-training-data' bucket, so reading a specific object from that bucket (Option C) is possible. It also grants s3:ListBucket on that bucket, so listing objects (Option D) is possible. The policy includes Athena permissions, so starting a query execution (Option B) is allowed. However, to read Athena query results, the user needs s3:GetObject permission on the S3 location where Athena writes the results, which is typically a different bucket (the query output location). The policy does not grant s3:GetObject on that output bucket, so reading the results (Option A) is not possible.
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.
✓
Read the Athena query results from the output S3 location
Why this is correct
The policy only allows read on my-training-data, not the Athena output bucket.
Clue confirmation
The clue word "NOT" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Start an Athena query execution
Why it's wrong here
Athena actions are allowed.
✗
Read a specific object from the my-training-data bucket
Why it's wrong here
s3:GetObject is allowed on my-training-data.
✗
List objects in the my-training-data bucket
Why it's wrong here
s3:ListBucket is allowed on my-training-data.
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.
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.
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 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.
Exploratory Data Analysis — This question tests Exploratory Data Analysis — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Read the Athena query results from the output S3 location — The policy grants s3:GetObject on the 'my-training-data' bucket, so reading a specific object from that bucket (Option C) is possible. It also grants s3:ListBucket on that bucket, so listing objects (Option D) is possible. The policy includes Athena permissions, so starting a query execution (Option B) is allowed. However, to read Athena query results, the user needs s3:GetObject permission on the S3 location where Athena writes the results, which is typically a different bucket (the query output location). The policy does not grant s3:GetObject on that output bucket, so reading the results (Option A) is not possible.
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: "NOT". Negative qualifier — you are looking for the one option that does NOT apply. Most options will be true; only one is false for this scenario.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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