- A
Enable default encryption with SSE-S3, enforce HTTPS only via bucket policy, and enable S3 Block Public Access.
SSE-S3 encrypts at rest, bucket policy enforces HTTPS, Block Public Access prevents public access.
- B
Enable default encryption with SSE-KMS, allow both HTTP and HTTPS, and set bucket ACLs to private.
Why wrong: Allowing HTTP violates in-transit encryption requirement.
- C
Use client-side encryption, enforce HTTPS via bucket policy, and enable S3 Block Public Access.
Why wrong: Client-side encryption is not managed by S3, but works; however, bucket policy enforcement is correct, but option A is simpler.
- D
Enable default encryption with SSE-S3, allow HTTP and HTTPS, and use bucket ACLs to block public access.
Why wrong: Allowing HTTP violates in-transit encryption.
DEA-C01 Data Store Management Practice Question
This DEA-C01 practice question tests your understanding of data store management. 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 company is using Amazon S3 to store sensitive customer data. The security team requires that all data be encrypted in transit and at rest. Additionally, they want to prevent any accidental public access. Which combination of actions should the data engineer take?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Enable default encryption with SSE-S3, enforce HTTPS only via bucket policy, and enable S3 Block Public Access.
Option A is correct because enabling default encryption with SSE-S3 ensures data is encrypted at rest automatically, enforcing HTTPS only via bucket policy ensures encryption in transit by rejecting HTTP requests, and enabling S3 Block Public Access prevents any accidental public exposure regardless of bucket policies or ACLs. This combination satisfies all security requirements: encryption in transit, encryption at rest, and prevention of public access.
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.
- ✓
Enable default encryption with SSE-S3, enforce HTTPS only via bucket policy, and enable S3 Block Public Access.
- ✗
Enable default encryption with SSE-KMS, allow both HTTP and HTTPS, and set bucket ACLs to private.
Why it's wrong here
Allowing HTTP violates in-transit encryption requirement.
- ✗
Use client-side encryption, enforce HTTPS via bucket policy, and enable S3 Block Public Access.
Why it's wrong here
Client-side encryption is not managed by S3, but works; however, bucket policy enforcement is correct, but option A is simpler.
- ✗
Enable default encryption with SSE-S3, allow HTTP and HTTPS, and use bucket ACLs to block public access.
Why it's wrong here
Allowing HTTP violates in-transit encryption.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may think bucket ACLs or client-side encryption alone satisfy the requirements, but the exam tests that S3 Block Public Access is needed to fully prevent accidental public access and that HTTPS enforcement is mandatory for encryption in transit.
Detailed technical explanation
How to think about this question
S3 Block Public Access provides four settings that override any bucket policies or ACLs to prevent public access, making it a stronger safeguard than ACLs alone. Enforcing HTTPS via bucket policy uses a condition like `aws:SecureTransport`: false to deny requests, ensuring all traffic uses TLS. SSE-S3 uses AES-256 encryption managed by Amazon S3, which is transparent and meets at-rest encryption requirements without key management overhead.
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.
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.
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FAQ
Questions learners often ask
What does this DEA-C01 question test?
Data Store Management — This question tests Data Store Management — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable default encryption with SSE-S3, enforce HTTPS only via bucket policy, and enable S3 Block Public Access. — Option A is correct because enabling default encryption with SSE-S3 ensures data is encrypted at rest automatically, enforcing HTTPS only via bucket policy ensures encryption in transit by rejecting HTTP requests, and enabling S3 Block Public Access prevents any accidental public exposure regardless of bucket policies or ACLs. This combination satisfies all security requirements: encryption in transit, encryption at rest, and prevention of public access.
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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Last reviewed: Jul 4, 2026
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.
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