DEA-C01 Data Operations and Support Practice Question
This DEA-C01 practice question tests your understanding of data operations and support. 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.
A data engineer needs to grant an IAM user read-only access to an S3 bucket named 'data-lake-bucket'. Which IAM policy statement should be attached to the user?
Option A is correct because it grants read-only access by allowing only the s3:GetObject action, which permits downloading objects from the bucket. The resource ARN includes the wildcard /* to cover all objects within 'data-lake-bucket', ensuring the user can read but not list or modify data.
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 all S3 actions, including write and delete.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse 'read-only access' with just s3:GetObject, forgetting that listing objects (s3:ListBucket) is typically needed for practical read-only use, but the question specifically asks for read-only access to the bucket, not listing, so s3:GetObject alone suffices for the stated requirement.
Detailed technical explanation
How to think about this question
For true read-only access, a policy should combine s3:ListBucket on the bucket ARN (arn:aws:s3:::data-lake-bucket) and s3:GetObject on the object ARN (arn:aws:s3:::data-lake-bucket/*) to allow both listing and reading objects. Without s3:ListBucket, the user cannot enumerate objects via the console or CLI, even though they can access known object keys directly with s3:GetObject.
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 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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Data Operations and Support — This question tests Data Operations and Support — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: {"Effect":"Allow","Action":"s3:GetObject","Resource":"arn:aws:s3:::data-lake-bucket/*"} — Option A is correct because it grants read-only access by allowing only the s3:GetObject action, which permits downloading objects from the bucket. The resource ARN includes the wildcard /* to cover all objects within 'data-lake-bucket', ensuring the user can read but not list or modify data.
What should I do if I get this DEA-C01 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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