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Data Protection →mediumMultiple ChoiceObjective-mapped

SCS-C02 Data Protection Practice Question

This SCS-C02 practice question tests your understanding of data protection. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 uses Amazon S3 to store sensitive documents. The security policy requires that all objects in the bucket are encrypted at rest. The bucket currently has default encryption configured with SSE-S3. A new requirement mandates that all objects must be encrypted with SSE-KMS using a specific customer-managed key. What is the MOST efficient way to enforce this without re-uploading existing objects?

A
Use S3 Inventory to list objects and a script to copy each object to itself with new encryption
Why wrong: Wrong: You cannot copy an object to itself; you need a different key or location.
B
Use S3 Lifecycle policy to transition objects and re-encrypt them
Why wrong: Wrong: Lifecycle policies do not re-encrypt objects.
C
Update the bucket default encryption to SSE-KMS and enable automatic re-encryption
Why wrong: Wrong: Default encryption only applies to new objects, not existing ones.
D
Update the bucket default encryption to SSE-KMS and use S3 Batch Operations to re-encrypt existing objects
Correct: S3 Batch Operations can copy objects with new encryption settings.

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

✓

Update the bucket default encryption to SSE-KMS and use S3 Batch Operations to re-encrypt existing objects

Option D is correct because updating the bucket default encryption to SSE-KMS only affects new objects, not existing ones. To enforce the new encryption requirement on existing objects without re-uploading, you can use S3 Batch Operations to copy objects in place with new encryption settings (e.g., using the --copy-source-s3-encryption-headers or a manifest to re-encrypt). Option A is inefficient for large datasets. Option B is incorrect because S3 Lifecycle policies do not re-encrypt objects; they only transition storage classes or expire objects. Option C is incorrect because changing default encryption does not automatically re-encrypt existing objects; you must use Batch Operations or a similar mechanism.

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 Inventory to list objects and a script to copy each object to itself with new encryption
Why it's wrong here
Wrong: You cannot copy an object to itself; you need a different key or location.
✗
Use S3 Lifecycle policy to transition objects and re-encrypt them
Why it's wrong here
Wrong: Lifecycle policies do not re-encrypt objects.
✗
Update the bucket default encryption to SSE-KMS and enable automatic re-encryption
Why it's wrong here
Wrong: Default encryption only applies to new objects, not existing ones.
✓
Update the bucket default encryption to SSE-KMS and use S3 Batch Operations to re-encrypt existing objects
Why this is correct
Correct: S3 Batch Operations can copy objects with new encryption settings.
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.

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?

Data Protection — This question tests Data Protection — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Update the bucket default encryption to SSE-KMS and use S3 Batch Operations to re-encrypt existing objects — Option D is correct because updating the bucket default encryption to SSE-KMS only affects new objects, not existing ones. To enforce the new encryption requirement on existing objects without re-uploading, you can use S3 Batch Operations to copy objects in place with new encryption settings (e.g., using the --copy-source-s3-encryption-headers or a manifest to re-encrypt). Option A is inefficient for large datasets. Option B is incorrect because S3 Lifecycle policies do not re-encrypt objects; they only transition storage classes or expire objects. Option C is incorrect because changing default encryption does not automatically re-encrypt existing objects; you must use Batch Operations or a similar mechanism.

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.