The correct answer is to create an S3 bucket policy that denies requests where `aws:SecureTransport` is false. This works because the `aws:SecureTransport` condition key checks whether the request was sent over HTTPS; by explicitly denying access when this condition is false, the policy enforces HTTPS for all data in transit between clients and the bucket. On the AWS Certified Data Engineer Associate DEA-C01 exam, this question tests your ability to distinguish between encryption at rest (like SSE-S3 or SSE-C) and encryption in transit, which is a common trap—many candidates confuse default bucket encryption with transport security. A reliable memory tip is to think of the bucket policy as a bouncer: it only lets in requests that arrive over a secure HTTPS connection, blocking any HTTP traffic at the door.
DEA-C01 Data Operations and Support Practice Question
This DEA-C01 practice question tests your understanding of data operations and support. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 company uses Amazon S3 to store sensitive data. The data engineer needs to ensure that all data in transit between the S3 bucket and clients is encrypted. Which configuration should the engineer implement?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create an S3 bucket policy that denies requests where SecureTransport is false.
Option D is correct because a bucket policy that denies requests without the aws:SecureTransport condition enforces HTTPS for all access. Option A is wrong because S3 default encryption only encrypts data at rest, not in transit. Option B is wrong because CloudFront does not enforce HTTPS by default; it can be configured but is not the direct solution. Option C is wrong because SSE-C is server-side encryption at rest, not in transit.
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.
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Use Amazon CloudFront to serve the content and enable SSL.
Why it's wrong here
CloudFront can help but does not enforce HTTPS for direct S3 access.
✗
Enable default encryption on the S3 bucket using SSE-S3.
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: Create an S3 bucket policy that denies requests where SecureTransport is false. — Option D is correct because a bucket policy that denies requests without the aws:SecureTransport condition enforces HTTPS for all access. Option A is wrong because S3 default encryption only encrypts data at rest, not in transit. Option B is wrong because CloudFront does not enforce HTTPS by default; it can be configured but is not the direct solution. Option C is wrong because SSE-C is server-side encryption at rest, not in transit.
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.
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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
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