The correct answer is that the command lists objects larger than 1,000,000 bytes under the data/ prefix. This is because the AWS CLI `s3api list-objects` command with `--query` uses JMESPath to filter results, and the expression `Size > '1000000'` compares the object size in bytes, not in binary megabytes (where 1 MB equals 1,048,576 bytes). On the AWS Certified Machine Learning Specialty MLS-C01 exam, this tests your ability to parse CLI output and understand that S3 object sizes are always returned in bytes, a common trap where candidates confuse decimal megabytes with binary megabytes. The command returns only the object keys, not counts or dates, making it essential for data scientists to efficiently locate large files for preprocessing. A helpful memory tip: think of the filter as "greater than one million bytes" rather than "greater than one megabyte" to avoid the 48,576-byte gap.
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.
Network Topology
A data scientist runs the above AWS CLI command. What does the command do?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
It lists objects larger than 1,000,000 bytes under the data/ prefix.
Option B is correct. The command lists objects in the bucket under prefix 'data/' that are greater than 1,000,000 bytes (Size > '1000000') and returns their keys. Option A is wrong because size is in bytes, not 1 MB (1 MB = 1,048,576 bytes). Option C is wrong because it returns keys, not counts. Option D is wrong because it filters by size, not date.
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.
✓
It lists objects larger than 1,000,000 bytes under the data/ prefix.
Why this is correct
The --query filters Size > '1000000', which is 1,000,000 bytes.
Related concept
Read the scenario before looking for a memorised answer.
✗
It counts the number of objects larger than 1 MB.
Why it's wrong here
It returns keys, not counts.
✗
It lists objects created after January 2023.
Why it's wrong here
No date filtering is applied.
✗
It lists objects larger than 1 MB in size.
Why it's wrong here
1 MB is 1,048,576 bytes; the filter uses 1,000,000 bytes, which is ~0.95 MB.
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.
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: It lists objects larger than 1,000,000 bytes under the data/ prefix. — Option B is correct. The command lists objects in the bucket under prefix 'data/' that are greater than 1,000,000 bytes (Size > '1000000') and returns their keys. Option A is wrong because size is in bytes, not 1 MB (1 MB = 1,048,576 bytes). Option C is wrong because it returns keys, not counts. Option D is wrong because it filters by size, not date.
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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A data scientist is exploring log files stored in S3. They ran the above AWS CLI command. What does the output indicate about the data, and what EDA step should be taken next?
medium
A.All log files are about 150KB-200KB in size.
B.There are 3 objects in the bucket under the prefix.
✓ C.There are 3 log files larger than 100KB in the specified prefix.
Why C: Option B is correct because the command filters objects larger than 100000 bytes, and the output shows three large files. Option A is wrong because the command does not count all objects; it filters by size. Option C is wrong because the output shows three files, not all files. Option D is wrong because the command explicitly filters by size, so the output is not all objects.
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This MLS-C01 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the MLS-C01 exam.
Question Discussion
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