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Security and Compliance →hardMultiple ChoiceObjective-mapped

SOA-C02 Security and Compliance Practice Question

This SOA-C02 practice question tests your understanding of security and compliance. 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 S3 bucket that stores sensitive customer data. The security team requires that all objects uploaded to the bucket must be encrypted at rest using AWS KMS with a specific customer managed key. Which bucket policy condition should be used to enforce this?

Question 1hardmultiple choice

Full question →

A
"Condition": {"StringEquals": {"s3:x-amz-server-side-encryption": "aws:kms"}}
Why wrong: This only enforces KMS encryption but does not restrict which KMS key can be used; any KMS key would be accepted.
B
"Condition": {"StringEquals": {"s3:x-amz-server-side-encryption": "aws:kms", "s3:x-amz-server-side-encryption-aws-kms-key-id": "arn:aws:kms:us-east-1:123456789012:key/abc123"}}
Combines both conditions to enforce KMS encryption and the specific customer managed key, meeting the requirement.
C
"Condition": {"StringEquals": {"s3:x-amz-server-side-encryption-aws-kms-key-id": "arn:aws:kms:us-east-1:123456789012:key/abc123"}}
Why wrong: This requires the specific key but does not enforce that the encryption is KMS; a request without encryption header would fail, but the condition alone is insufficient.
D
"Condition": {"Null": {"s3:x-amz-server-side-encryption": "false"}}
Why wrong: The Null condition checks if the header is absent; 'false' means the header must be present, but it doesn't enforce KMS specifically.

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

✓

"Condition": {"StringEquals": {"s3:x-amz-server-side-encryption": "aws:kms", "s3:x-amz-server-side-encryption-aws-kms-key-id": "arn:aws:kms:us-east-1:123456789012:key/abc123"}}

The condition 's3:x-amz-server-side-encryption':'aws:kms' ensures KMS encryption is used, and 's3:x-amz-server-side-encryption-aws-kms-key-id' with the specific key ARN ensures only that key is used. Option A enforces KMS encryption but does not specify the key; Option B allows any KMS key; Option C is incorrect because it uses 'Null' condition incorrectly; Option D correctly enforces both encryption and key.

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.

✗
"Condition": {"StringEquals": {"s3:x-amz-server-side-encryption": "aws:kms"}}
Why it's wrong here
This only enforces KMS encryption but does not restrict which KMS key can be used; any KMS key would be accepted.
✓
"Condition": {"StringEquals": {"s3:x-amz-server-side-encryption": "aws:kms", "s3:x-amz-server-side-encryption-aws-kms-key-id": "arn:aws:kms:us-east-1:123456789012:key/abc123"}}
Why this is correct
Combines both conditions to enforce KMS encryption and the specific customer managed key, meeting the requirement.
Related concept
Read the scenario before looking for a memorised answer.
✗
"Condition": {"StringEquals": {"s3:x-amz-server-side-encryption-aws-kms-key-id": "arn:aws:kms:us-east-1:123456789012:key/abc123"}}
Why it's wrong here
This requires the specific key but does not enforce that the encryption is KMS; a request without encryption header would fail, but the condition alone is insufficient.
✗
"Condition": {"Null": {"s3:x-amz-server-side-encryption": "false"}}
Why it's wrong here
The Null condition checks if the header is absent; 'false' means the header must be present, but it doesn't enforce KMS specifically.

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 SOA-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 SOA-C02 question test?

Security and Compliance — This question tests Security and Compliance — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: "Condition": {"StringEquals": {"s3:x-amz-server-side-encryption": "aws:kms", "s3:x-amz-server-side-encryption-aws-kms-key-id": "arn:aws:kms:us-east-1:123456789012:key/abc123"}} — The condition 's3:x-amz-server-side-encryption':'aws:kms' ensures KMS encryption is used, and 's3:x-amz-server-side-encryption-aws-kms-key-id' with the specific key ARN ensures only that key is used. Option A enforces KMS encryption but does not specify the key; Option B allows any KMS key; Option C is incorrect because it uses 'Null' condition incorrectly; Option D correctly enforces both encryption and key.

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

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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