DEA-C01 S3 Bucket Policy Conditions Practice Question
This DEA-C01 practice question tests your understanding of data security and governance. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. A key principle to apply: s3 Bucket Policy Conditions. 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. An S3 bucket policy is shown. A data engineer using the DataEngineerRole tries to upload an object to s3://example-bucket/data/report.csv with SSE-S3 encryption. The upload fails. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The condition requires SSE-S3 encryption header, but the upload did not include it.
The bucket policy includes a condition that the request must include the `x-amz-server-side-encryption` header with value `AES256` (SSE-S3). The upload did not include this header, so the policy condition was not met, resulting in a failed upload. Option A is incorrect because the resource ARN matches the object path. Option B is incorrect because the role has the `s3:PutObject` permission. Option D is incorrect because the principal (DataEngineerRole) is allowed by the policy.
Key principle: S3 Bucket Policy Conditions
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
The resource ARN does not match the object.
Why it's wrong here
The ARN matches the object path.
✗
The role does not have s3:PutObject permission.
Why it's wrong here
The policy grants s3:PutObject.
✓
The condition requires SSE-S3 encryption header, but the upload did not include it.
Why this is correct
The condition requires the encryption header to be present and set to AES256.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
S3 Bucket Policy Conditions
✗
The principal is not authorized.
Why it's wrong here
The principal is the DataEngineerRole.
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
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
S3 Bucket Policy Conditions
SSE-S3 Encryption
s3:PutObject
Resource ARN in Bucket Policy
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
S3 Bucket Policy Conditions
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.
Review s3 Bucket Policy Conditions, then practise related DEA-C01 questions on the same topic to reinforce the concept.
Data Security and Governance — This question tests Data Security and Governance — S3 Bucket Policy Conditions.
What is the correct answer to this question?
The correct answer is: The condition requires SSE-S3 encryption header, but the upload did not include it. — The bucket policy includes a condition that the request must include the `x-amz-server-side-encryption` header with value `AES256` (SSE-S3). The upload did not include this header, so the policy condition was not met, resulting in a failed upload. Option A is incorrect because the resource ARN matches the object path. Option B is incorrect because the role has the `s3:PutObject` permission. Option D is incorrect because the principal (DataEngineerRole) is allowed by the policy.
What should I do if I get this DEA-C01 question wrong?
Review s3 Bucket Policy Conditions, then practise related DEA-C01 questions on the same topic to reinforce the concept.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
S3 Bucket Policy Conditions
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Question Discussion
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