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SCS-C02 Infrastructure Security Practice Question

This SCS-C02 practice question tests your understanding of infrastructure security. 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.

Match each AWS Storage service encryption feature to its description.

A
SSE-S3: Encryption keys are managed by Amazon S3.
SSE-S3 uses server-side encryption where Amazon S3 manages the encryption keys, providing a simple encryption solution without customer key management.
B
SSE-KMS: Encryption keys are managed by the customer using AWS KMS.
SSE-KMS allows customers to use AWS Key Management Service (KMS) to manage their own encryption keys, offering more control and audit capabilities.
C
Client-side encryption: Encryption is performed on the client side before data is sent to S3.
Client-side encryption requires the customer to encrypt data locally before uploading it to Amazon S3, ensuring no plaintext data is transmitted to AWS.
D
EBS encryption: Encryption is applied at the application level.
Why wrong: EBS encryption is applied at the block level, not the application level. It transparently encrypts volumes using AWS KMS keys.
E
Glacier encryption: Encryption is optional for data at rest.
Why wrong: Amazon S3 Glacier encrypts all data at rest by default using AES-256; encryption is not optional.

Full breakdown with real-world context →

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

✓

SSE-S3: Encryption keys are managed by Amazon S3.

AWS storage services offer various encryption options. S3 SSE-S3 and SSE-KMS are server-side encryption methods with different key management approaches. Client-side encryption occurs before data upload. EBS encryption is transparent block-level encryption, and Glacier automatically encrypts data at rest.

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.

✓
SSE-S3: Encryption keys are managed by Amazon S3.
Why this is correct
SSE-S3 uses server-side encryption where Amazon S3 manages the encryption keys, providing a simple encryption solution without customer key management.
Related concept
Read the scenario before looking for a memorised answer.
✓
SSE-KMS: Encryption keys are managed by the customer using AWS KMS.
Why this is correct
SSE-KMS allows customers to use AWS Key Management Service (KMS) to manage their own encryption keys, offering more control and audit capabilities.
Related concept
Read the scenario before looking for a memorised answer.
✓
Client-side encryption: Encryption is performed on the client side before data is sent to S3.
Why this is correct
Client-side encryption requires the customer to encrypt data locally before uploading it to Amazon S3, ensuring no plaintext data is transmitted to AWS.
Related concept
Read the scenario before looking for a memorised answer.
✗
EBS encryption: Encryption is applied at the application level.
Why it's wrong here
EBS encryption is applied at the block level, not the application level. It transparently encrypts volumes using AWS KMS keys.
✗
Glacier encryption: Encryption is optional for data at rest.
Why it's wrong here
Amazon S3 Glacier encrypts all data at rest by default using AES-256; encryption is not optional.

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 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.

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FAQ

Questions learners often ask

What does this SCS-C02 question test?

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: SSE-S3: Encryption keys are managed by Amazon S3. — AWS storage services offer various encryption options. S3 SSE-S3 and SSE-KMS are server-side encryption methods with different key management approaches. Client-side encryption occurs before data upload. EBS encryption is transparent block-level encryption, and Glacier automatically encrypts data at rest.

What should I do if I get this SCS-C02 question wrong?

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.