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Quick Answer
The answer is to enable default encryption with SSE-KMS and enable S3 Block Public Access. SSE-KMS encrypts data at rest using AWS Key Management Service, giving you control over encryption keys and audit trails, which is essential for protecting PII in an S3 data lake from unauthorized access. S3 Block Public Access acts as a safety net, preventing any accidental public exposure of sensitive data, regardless of bucket policies or object ACLs. On the AWS Certified Data Engineer Associate DEA-C01 exam, this question tests your understanding of data protection fundamentals versus performance or cost features—common traps include confusing Transfer Acceleration (speed) or Requester Pays (cost control) with security. Remember the memory tip: "Encrypt and block" for PII protection; encryption handles the data itself, while Block Public Access locks the door.
DEA-C01 Data Store Management Practice Question
This DEA-C01 practice question tests your understanding of data store management. 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 company is designing a data lake on Amazon S3 for analytics. The data includes sensitive personally identifiable information (PII). Which TWO actions should the company take to protect the data? (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
✓
Enable S3 Block Public Access.
Options A and D are correct. Option A is correct because encrypting at rest with SSE-KMS provides encryption and key management. Option D is correct because S3 Block Public Access prevents accidental public exposure. Option B is wrong because S3 Transfer Acceleration is for speed, not security. Option C is wrong because cross-region replication does not protect data in the source bucket. Option E is wrong because Requester Pays does not control access.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
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Data Store Management — study guide chapter
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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 S3 Block Public Access. — Options A and D are correct. Option A is correct because encrypting at rest with SSE-KMS provides encryption and key management. Option D is correct because S3 Block Public Access prevents accidental public exposure. Option B is wrong because S3 Transfer Acceleration is for speed, not security. Option C is wrong because cross-region replication does not protect data in the source bucket. Option E is wrong because Requester Pays does not control access.
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
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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