- A
Enable S3 Transfer Acceleration on the bucket.
Why wrong: Transfer Acceleration speeds up transfers but does not enforce encryption.
- B
Enable default encryption on the S3 bucket.
Why wrong: Default encryption applies to data at rest, not in transit.
- C
Use server-side encryption with S3 managed keys (SSE-S3).
Why wrong: SSE-S3 is for data at rest, not in transit.
- D
Use an S3 VPC Endpoint and enforce the use of HTTPS through bucket policies.
VPC Endpoint with HTTPS policy ensures encrypted transit.
- E
Use AWS Storage Gateway to mount S3 as a file system and configure it to use HTTPS.
Storage Gateway with HTTPS encrypts data in transit.
Question 1,514 of 1,786
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 security team requires that all data in transit between on-premises applications and S3 be encrypted. The data engineer must implement a solution that meets this requirement without changing the applications. Which TWO solutions should the engineer consider? (Choose two.)
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
✓
Use an S3 VPC Endpoint and enforce the use of HTTPS through bucket policies.
Option D is correct because using an S3 VPC Endpoint with a bucket policy that enforces HTTPS ensures all traffic to S3 is encrypted in transit, without any application changes. Option E is correct because AWS Storage Gateway can mount S3 as a file system and be configured to use HTTPS, enforcing encryption in transit. Option A is incorrect because S3 Transfer Acceleration only improves speed over long distances, it does not enforce encryption—it optionally uses HTTPS but the application must still use HTTPS. Option B is incorrect because default encryption (SSE-S3, SSE-KMS, DSSE-KMS) encrypts data at rest, not in transit. Option C is incorrect because server-side encryption with SSE-S3 also only encrypts data at rest.
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 S3 Transfer Acceleration on the bucket.
Why it's wrong here
Transfer Acceleration speeds up transfers but does not enforce encryption.
- ✗
Enable default encryption on the S3 bucket.
Why it's wrong here
Default encryption applies to data at rest, not in transit.
- ✗
Use server-side encryption with S3 managed keys (SSE-S3).
Why it's wrong here
SSE-S3 is for data at rest, not in transit.
- ✓
Use an S3 VPC Endpoint and enforce the use of HTTPS through bucket policies.
Why this is correct
VPC Endpoint with HTTPS policy ensures encrypted transit.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Use AWS Storage Gateway to mount S3 as a file system and configure it to use HTTPS.
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.
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.
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.
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FAQ
Questions learners often ask
What does this DEA-C01 question test?
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: Use an S3 VPC Endpoint and enforce the use of HTTPS through bucket policies. — Option D is correct because using an S3 VPC Endpoint with a bucket policy that enforces HTTPS ensures all traffic to S3 is encrypted in transit, without any application changes. Option E is correct because AWS Storage Gateway can mount S3 as a file system and be configured to use HTTPS, enforcing encryption in transit. Option A is incorrect because S3 Transfer Acceleration only improves speed over long distances, it does not enforce encryption—it optionally uses HTTPS but the application must still use HTTPS. Option B is incorrect because default encryption (SSE-S3, SSE-KMS, DSSE-KMS) encrypts data at rest, not in transit. Option C is incorrect because server-side encryption with SSE-S3 also only encrypts data at rest.
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
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Last reviewed: Jun 20, 2026
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