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 of the following are valid methods to secure data at rest in Amazon S3? (Choose two.)
Use S3 server-side encryption with customer-provided keys (SSE-C).
SSE-C encrypts data at rest in S3 using keys provided by the customer.
B
Enable S3 Object Lock.
Why wrong: Object Lock is for WORM protection, not encryption.
C
Use client-side encryption before uploading objects to S3.
Why wrong: Client-side encryption is done before upload and is a valid method, but the question asks for methods to secure data at rest in S3; client-side encryption is done client-side, not in S3.
D
Enable S3 Transfer Acceleration.
Why wrong: Transfer Acceleration is a performance feature, not an encryption feature.
E
Use S3 server-side encryption with S3-managed keys (SSE-S3).
SSE-S3 encrypts data at rest in S3 using Amazon-managed keys.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use S3 server-side encryption with customer-provided keys (SSE-C).
The correct answers are A and C. Option A is correct because S3 SSE-S3 uses server-side encryption with Amazon S3-managed keys. Option C is correct because S3 SSE-C uses customer-provided encryption keys. Option B is wrong because client-side encryption is done before uploading, but it is not a server-side encryption method; however, it is a valid method to secure data at rest, but the question asks for methods to secure data at rest in S3, and client-side encryption is done before data reaches S3. Option D is wrong because S3 Transfer Acceleration is for faster uploads, not encryption. Option E is wrong because S3 Object Lock is for write-once-read-many (WORM) protection, 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.
✓
Use S3 server-side encryption with customer-provided keys (SSE-C).
Why this is correct
SSE-C encrypts data at rest in S3 using keys provided by the customer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable S3 Object Lock.
Why it's wrong here
Object Lock is for WORM protection, not encryption.
✗
Use client-side encryption before uploading objects to S3.
Why it's wrong here
Client-side encryption is done before upload and is a valid method, but the question asks for methods to secure data at rest in S3; client-side encryption is done client-side, not in S3.
✗
Enable S3 Transfer Acceleration.
Why it's wrong here
Transfer Acceleration is a performance feature, not an encryption feature.
✓
Use S3 server-side encryption with S3-managed keys (SSE-S3).
Why this is correct
SSE-S3 encrypts data at rest in S3 using Amazon-managed keys.
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: Use S3 server-side encryption with customer-provided keys (SSE-C). — The correct answers are A and C. Option A is correct because S3 SSE-S3 uses server-side encryption with Amazon S3-managed keys. Option C is correct because S3 SSE-C uses customer-provided encryption keys. Option B is wrong because client-side encryption is done before uploading, but it is not a server-side encryption method; however, it is a valid method to secure data at rest, but the question asks for methods to secure data at rest in S3, and client-side encryption is done before data reaches S3. Option D is wrong because S3 Transfer Acceleration is for faster uploads, not encryption. Option E is wrong because S3 Object Lock is for write-once-read-many (WORM) protection, 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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