The correct answer is that the upload fails with a 403 Access Denied error. This happens because the S3 bucket policy condition explicitly requires the `s3:x-amz-server-side-encryption` header to be present and set to `AES256`; when the application omits this encryption header, the condition evaluates to false, and the policy denies the request before any object is written. On the AWS Certified Data Engineer Associate DEA-C01 exam, this scenario tests your understanding of how bucket policy conditions enforce encryption at upload time, a common security control for compliance. A frequent trap is assuming the object is stored unencrypted or that a missing header defaults to allowed—neither is true when the condition is mandatory. Remember the memory tip: “No header, no entry—403 is the sentry.”
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 creates an IAM policy as shown in the exhibit. The engineer then attaches this policy to an IAM role used by an application that uploads objects to the S3 bucket 'my-bucket'. When the application uploads an object without specifying server-side encryption, what happens?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The upload fails with a 403 Access Denied error.
Option D is correct because the policy requires the s3:x-amz-server-side-encryption header to be set to AES256. If the request does not include that header, the condition is not met, and the request is denied with a 403 Access Denied error. Option A is wrong because the object is not uploaded. Option B is wrong because the condition requires AES256, not SSE-C. Option C is wrong because the condition is not met if the header is absent; the request is denied.
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.
✗
The object is uploaded with SSE-S3 encryption by default.
Why it's wrong here
Default encryption does not satisfy the condition if not specified in the request.
✓
The upload fails with a 403 Access Denied error.
Why this is correct
The condition is not met, so the request is denied.
Related concept
Read the scenario before looking for a memorised answer.
✗
The object is uploaded without encryption.
Why it's wrong here
The policy denies requests without encryption.
✗
The object is uploaded with SSE-C encryption.
Why it's wrong here
The condition requires AES256, not SSE-C.
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 DEA-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.
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: The upload fails with a 403 Access Denied error. — Option D is correct because the policy requires the s3:x-amz-server-side-encryption header to be set to AES256. If the request does not include that header, the condition is not met, and the request is denied with a 403 Access Denied error. Option A is wrong because the object is not uploaded. Option B is wrong because the condition requires AES256, not SSE-C. Option C is wrong because the condition is not met if the header is absent; the request is denied.
What should I do if I get this DEA-C01 question wrong?
Identify which DEA-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 →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This DEA-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 DEA-C01 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.