The correct answer is that this policy allows read access to all objects in the data-lake bucket. This is because the S3 bucket policy grants the s3:GetObject action without any resource restriction, meaning it applies to the entire bucket and every object within it, rather than a specific prefix or folder. On the CompTIA Data+ DA0-001 exam, this tests your understanding of how bucket-level policies control access at the object level—a common trap is confusing a bucket policy that allows ListBucket (listing keys) with one that allows GetObject (reading data). Remember, for read access to the actual content, you need the s3:GetObject permission; a policy that only allows s3:ListBucket lets you see the filenames but not download the files. A quick memory tip: "Get the object, get the data; list the bucket, list the names."
DA0-001 Analyzing and Modeling Data Practice Question
This DA0-001 practice question tests your understanding of analyzing and modeling data. 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.
Refer to the exhibit. A data analyst wants to grant read access to an entire S3 bucket named 'data-lake'. Which of the following best describes what this policy does?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Allows read access to all objects in the data-lake bucket
This policy grants read access to all objects within the 'data-lake' S3 bucket. In AWS S3, a bucket-level policy that allows the 's3:GetObject' action without a condition restricting the resource to a specific prefix or folder effectively permits reading every object in the bucket. Option D correctly identifies this behavior.
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.
✗
Allows both read and write access to the bucket
Why it's wrong here
Only s3:GetObject is allowed; no write actions are included.
✗
Allows only specific users to read objects
Why it's wrong here
The policy does not specify which users; it is attached to a principal to grant permissions.
✗
Allows read access to a specific folder within the bucket
Why it's wrong here
The resource arn:aws:s3:::data-lake/* covers all objects in the bucket, not just a folder.
✓
Allows read access to all objects in the data-lake bucket
Why this is correct
The policy grants s3:GetObject on the entire bucket, enabling read access to all objects.
Clue confirmation
The clue word "best" 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
The trap here is that candidates often confuse a bucket-level policy that grants access to all objects with one that restricts access to a specific folder or user, overlooking the absence of a condition or principal specification in the policy statement.
Detailed technical explanation
How to think about this question
In AWS S3, bucket policies are evaluated at the resource level, and the 'Resource' element in the policy statement determines which objects are affected. Using 'arn:aws:s3:::data-lake/*' as the resource includes all objects in the bucket. To restrict access to a specific folder, you would need to specify a prefix like 'arn:aws:s3:::data-lake/folder/*'. Additionally, S3 bucket policies support conditions such as 's3:prefix' or 's3:object-lock-mode' for finer-grained control.
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 security administrator must allow nursing staff to reach a patient records server while blocking access from the guest Wi-Fi VLAN. After applying an extended ACL, traffic is still blocked from nursing workstations. The ACL was applied outbound instead of inbound on the wrong interface. Questions like this test ACL direction and placement rules.
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.
Analyzing and Modeling Data — This question tests Analyzing and Modeling Data — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Allows read access to all objects in the data-lake bucket — This policy grants read access to all objects within the 'data-lake' S3 bucket. In AWS S3, a bucket-level policy that allows the 's3:GetObject' action without a condition restricting the resource to a specific prefix or folder effectively permits reading every object in the bucket. Option D correctly identifies this behavior.
What should I do if I get this DA0-001 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: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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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