The answer is S3 Object Lock with retention mode set to COMPLIANCE, as this is the only feature that enforces a strict, immutable retention period to prevent any data overwrites or deletions for a fixed duration. This works by applying a retention date to each object; once set, not even the root AWS account can delete or overwrite the object until the retention period expires, making it the definitive solution for regulatory requirements like holding data for seven years. On the AWS Certified Data Engineer Associate DEA-C01 exam, this question tests your understanding of data protection mechanisms versus governance controls—a common trap is confusing COMPLIANCE mode with GOVERNANCE mode, which allows privileged users to shorten retention periods. Remember that COMPLIANCE is absolute and irreversible, while GOVERNANCE offers flexibility for testing. For a memory tip, think “COMPLIANCE = Concrete, Unchangeable, Mandatory Protection” to recall that it locks objects with no override possible.
DEA-C01 Data Security and Governance Practice Question
This DEA-C01 practice question tests your understanding of data security and governance. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 is designing a data lake on Amazon S3 that must comply with a regulatory requirement to prevent any data from being overwritten or deleted for 7 years after creation. Which S3 feature should be used?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
S3 Object Lock with retention mode set to COMPLIANCE
Option A is correct because S3 Object Lock with retention mode COMPLIANCE prevents any deletion or overwrite for the specified period. Option B is wrong because MFA Delete requires a token but can still be disabled. Option C is wrong because bucket policies can be changed. Option D is wrong because versioning alone does not prevent deletion; objects can still be deleted with delete markers.
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.
✗
S3 bucket policy that denies s3:DeleteObject
Why it's wrong here
Bucket policy can be changed or bypassed by root.
✗
S3 bucket versioning with MFA Delete
Why it's wrong here
MFA Delete can be disabled by the root user, not fully compliant.
✓
S3 Object Lock with retention mode set to COMPLIANCE
Why this is correct
COMPLIANCE retention prevents any deletion or overwrite during the retention period.
Related concept
Read the scenario before looking for a memorised answer.
✗
S3 bucket versioning only
Why it's wrong here
Versioning does not prevent deletion; delete markers can be added.
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 Security and Governance — This question tests Data Security and Governance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: S3 Object Lock with retention mode set to COMPLIANCE — Option A is correct because S3 Object Lock with retention mode COMPLIANCE prevents any deletion or overwrite for the specified period. Option B is wrong because MFA Delete requires a token but can still be disabled. Option C is wrong because bucket policies can be changed. Option D is wrong because versioning alone does not prevent deletion; objects can still be deleted with delete markers.
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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