The correct answer is that the JSON policy allows read access to objects from the bucket. This is because the policy explicitly grants the `s3:GetObject` action, which is the AWS API call used to retrieve or read an object stored in an S3 bucket. In the context of a data lake, this permission enables a data engineer to fetch files, such as raw data or analytics outputs, without allowing write or delete operations. On the CompTIA Data+ DA0-001 exam, this concept tests your understanding of how IAM policies control access to cloud storage resources, often appearing in scenario-based questions where you must identify which action corresponds to a specific data operation. A common trap is confusing `s3:GetObject` with `s3:ListBucket`—the former reads the object itself, while the latter only lists object names. To remember, think of "Get" as "Grab the file," not just "Glance at the names."
DA0-001 Mining and Acquiring Data Practice Question
This DA0-001 practice question tests your understanding of mining and acquiring 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.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Read objects from the bucket
The JSON policy shown grants the `s3:GetObject` action, which allows reading objects from the specified S3 bucket. This is a standard AWS IAM policy that explicitly permits the `GetObject` API call, enabling the data engineer to retrieve objects from the data lake.
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.
✗
Change user permissions
Why it's wrong here
The policy is a resource-based policy, not about user permissions.
✓
Read objects from the bucket
Why this is correct
GetObject allows reading.
Related concept
Read the scenario before looking for a memorised answer.
✗
Delete objects from the bucket
Why it's wrong here
DeleteObject is not included.
✗
Write objects to the bucket
Why it's wrong here
The action is GetObject, not PutObject.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse `s3:GetObject` with broader permissions like `s3:PutObject` or `s3:DeleteObject`, or assume that any S3 policy allows all actions, when in fact each action must be explicitly listed.
Detailed technical explanation
How to think about this question
Under the hood, AWS S3 access control evaluates the `Effect`, `Action`, and `Resource` fields in the policy. The `s3:GetObject` action corresponds to the HTTP GET request to the S3 REST API, and the `arn:aws:s3:::bucket-name/*` resource specifies all objects within the bucket. In real-world scenarios, this policy is often attached to an IAM role for read-only data lake access, ensuring that users cannot inadvertently modify or delete critical datasets.
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.
Mining and Acquiring Data — This question tests Mining and Acquiring Data — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Read objects from the bucket — The JSON policy shown grants the `s3:GetObject` action, which allows reading objects from the specified S3 bucket. This is a standard AWS IAM policy that explicitly permits the `GetObject` API call, enabling the data engineer to retrieve objects from the data lake.
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.
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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