- A
Enable server access logging for the S3 bucket.
Why wrong: Logs are for auditing, not prevention.
- B
Create an S3 bucket policy that explicitly denies the s3:DeleteObject action.
Prevents any user from deleting objects.
- C
Configure a lifecycle policy to transition objects to Glacier.
Why wrong: This does not prevent deletion.
- D
Enable versioning on the S3 bucket.
Allows recovery of deleted objects.
- E
Enable MFA Delete on the S3 bucket.
Requires MFA to delete objects.
Question 1,610 of 1,786
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 company uses Amazon S3 to store data for analytics. The data engineer needs to ensure that the S3 bucket is protected against accidental deletion of objects. Which THREE actions should the engineer take? (Choose THREE.)
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
✓
Create an S3 bucket policy that explicitly denies the s3:DeleteObject action.
To protect against accidental deletion of objects in Amazon S3, three effective measures are: creating a bucket policy that explicitly denies the s3:DeleteObject action (option B), enabling versioning (option D), and enabling MFA Delete (option E). Option B ensures that no principal can delete objects unless an explicit allow overrides it. Option D preserves all object versions, allowing recovery of deleted objects. Option E requires multi-factor authentication for deletion operations, adding an extra security layer. Option A (server access logging) is for auditing, not prevention. Option C (lifecycle policy to Glacier) does not prevent deletion; it transitions objects to cheaper storage but objects can still be deleted by lifecycle rules or manually.
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 server access logging for the S3 bucket.
Why it's wrong here
Logs are for auditing, not prevention.
- ✓
Create an S3 bucket policy that explicitly denies the s3:DeleteObject action.
Why this is correct
Prevents any user from deleting objects.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Configure a lifecycle policy to transition objects to Glacier.
Why it's wrong here
This does not prevent deletion.
- ✓
Enable versioning on the S3 bucket.
Why this is correct
Allows recovery of deleted objects.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Enable MFA Delete on the S3 bucket.
Why this is correct
Requires MFA to delete objects.
Related concept
Read the scenario before looking for a memorised answer.
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: Create an S3 bucket policy that explicitly denies the s3:DeleteObject action. — To protect against accidental deletion of objects in Amazon S3, three effective measures are: creating a bucket policy that explicitly denies the s3:DeleteObject action (option B), enabling versioning (option D), and enabling MFA Delete (option E). Option B ensures that no principal can delete objects unless an explicit allow overrides it. Option D preserves all object versions, allowing recovery of deleted objects. Option E requires multi-factor authentication for deletion operations, adding an extra security layer. Option A (server access logging) is for auditing, not prevention. Option C (lifecycle policy to Glacier) does not prevent deletion; it transitions objects to cheaper storage but objects can still be deleted by lifecycle rules or manually.
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 →
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Last reviewed: Jun 20, 2026
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