The correct answer is that S3 Block Public Access and server-side encryption are both valid methods to secure data at rest in Amazon S3. Server-side encryption, including SSE-S3, SSE-KMS, and SSE-C, protects data by encrypting it at the object level before it is written to disk, while S3 Block Public Access acts as a security guardrail that prevents any public access to buckets and objects, effectively securing data at rest by ensuring it is never exposed to unauthorized users. On the AWS Certified Security Specialty SCS-C02 exam, this question tests your ability to distinguish between access control mechanisms and encryption methods—a common trap is confusing bucket policies or versioning with data-at-rest security. Remember, encryption scrambles the data itself, while Block Public Access locks the door; both are needed for a defense-in-depth strategy. A helpful memory tip: “Encrypt the file, lock the bucket—data at rest is fully protected.”
SCS-C02 Infrastructure Security Practice Question
This SCS-C02 practice question tests your understanding of infrastructure security. 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.
Which TWO are valid methods to secure data at rest in Amazon S3? (Choose TWO.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enabling default encryption on the S3 bucket.
Options B and D are correct. Server-side encryption (SSE-S3, SSE-KMS, SSE-C) and S3 Block Public Access are both methods to secure data at rest. Option A is wrong because bucket policies control access but do not encrypt data. Option C is wrong because versioning helps with data recovery, not encryption. Option E is wrong because MFA Delete adds protection for deletion, not encryption.
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.
✓
Enabling default encryption on the S3 bucket.
Why this is correct
Default encryption ensures objects are encrypted at rest.
Related concept
Read the scenario before looking for a memorised answer.
Versioning protects against overwrites, not encryption.
✗
Configuring an S3 bucket policy to restrict access to specific IP addresses.
Why it's wrong here
This is access control, not encryption.
✓
Using S3 Block Public Access settings.
Why this is correct
Block Public Access prevents public access, securing data.
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.
What to study next
Got this wrong? Here's your next step.
Identify which SCS-C02 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.
Infrastructure Security — This question tests Infrastructure Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enabling default encryption on the S3 bucket. — Options B and D are correct. Server-side encryption (SSE-S3, SSE-KMS, SSE-C) and S3 Block Public Access are both methods to secure data at rest. Option A is wrong because bucket policies control access but do not encrypt data. Option C is wrong because versioning helps with data recovery, not encryption. Option E is wrong because MFA Delete adds protection for deletion, not encryption.
What should I do if I get this SCS-C02 question wrong?
Identify which SCS-C02 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 SCS-C02 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 SCS-C02 exam.
Question Discussion
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