The answer is to enable default encryption on the S3 bucket using SSE-S3 or SSE-KMS. This works because default encryption automatically applies server-side encryption to every new object written to the bucket, enforcing encryption at rest without requiring any client-side changes or bucket policy conditions. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this scenario tests your understanding that bucket policies can be circumvented by pre-signed URLs or direct PUTs without the required headers, making default encryption the only reliable, server-enforced mechanism. A common trap is choosing a bucket policy with a condition for encryption headers, but that can be bypassed, whereas default encryption is unconditional. Remember the mnemonic: "Default is Definite" — default encryption is the definitive way to enforce S3 bucket encryption at rest, while policies are porous.
SAP-C02 Continuous Improvement for Existing Solutions Practice Question
This SAP-C02 practice question tests your understanding of continuous improvement for existing solutions. 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.
A company has an Amazon S3 bucket that stores sensitive data. They want to ensure that all objects in the bucket are encrypted at rest. What should they do?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable default encryption on the S3 bucket using SSE-S3 or SSE-KMS.
Option B is correct because enabling default encryption on the bucket ensures all new objects are encrypted. Option A is wrong because bucket policy can be circumvented. Option C is wrong because CloudTrail only logs. Option D is wrong because versioning does not enforce 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 AWS CloudTrail to monitor for unencrypted objects.
Why it's wrong here
CloudTrail logs but does not enforce encryption.
✓
Enable default encryption on the S3 bucket using SSE-S3 or SSE-KMS.
Why this is correct
Default encryption automatically encrypts all new objects.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable S3 Versioning to protect objects.
Why it's wrong here
Versioning does not encrypt objects.
✗
Create a bucket policy that denies PutObject if the object is not encrypted.
Why it's wrong here
This policy is good but can be bypassed if not properly written; default encryption is simpler.
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 SAP-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.
Continuous Improvement for Existing Solutions — This question tests Continuous Improvement for Existing Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable default encryption on the S3 bucket using SSE-S3 or SSE-KMS. — Option B is correct because enabling default encryption on the bucket ensures all new objects are encrypted. Option A is wrong because bucket policy can be circumvented. Option C is wrong because CloudTrail only logs. Option D is wrong because versioning does not enforce encryption.
What should I do if I get this SAP-C02 question wrong?
Identify which SAP-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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Question Discussion
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