- A
Enable versioning on the S3 bucket.
Why wrong: Versioning does not enforce encryption; it only keeps multiple versions.
- B
Configure the S3 bucket policy to require HTTPS for all uploads.
Why wrong: This enforces encryption in transit, not server-side encryption.
- C
In the buildspec.yaml, set the 'artifacts' section to include 'encryptionDisabled: false' and specify the KMS key ID.
This configures CodeBuild to encrypt the artifacts with the specified KMS key.
- D
Enable default encryption on the S3 bucket using SSE-KMS.
Why wrong: Default encryption applies only if the upload does not specify encryption; CodeBuild can override it.
- E
Grant the CodeBuild service role permission to use the KMS key via the key policy.
Without permission, CodeBuild cannot use the KMS key to encrypt artifacts.
How to Encrypt CodeBuild Artifacts in S3 Using AWS KMS
This DOP-C02 practice question tests your understanding of sdlc automation. 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.
Which TWO actions should a DevOps engineer take to ensure that an AWS CodeBuild project's artifacts are automatically deployed to an Amazon S3 bucket with server-side encryption using AWS KMS? (Choose 2.)
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
In the buildspec.yaml, set the 'artifacts' section to include 'encryptionDisabled: false' and specify the KMS key ID.
Option C is correct because setting 'encryptionDisabled: false' in the buildspec.yaml artifacts section explicitly enables encryption for the build output, and specifying the KMS key ID ensures that the artifacts are encrypted with that specific AWS KMS key. This configuration directly instructs CodeBuild to use server-side encryption with AWS KMS when uploading artifacts to S3.
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.
- ✗
Enable versioning on the S3 bucket.
Why it's wrong here
Versioning does not enforce encryption; it only keeps multiple versions.
- ✗
Configure the S3 bucket policy to require HTTPS for all uploads.
Why it's wrong here
This enforces encryption in transit, not server-side encryption.
- ✓
In the buildspec.yaml, set the 'artifacts' section to include 'encryptionDisabled: false' and specify the KMS key ID.
Why this is correct
This configures CodeBuild to encrypt the artifacts with the specified KMS key.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Enable default encryption on the S3 bucket using SSE-KMS.
Why it's wrong here
Default encryption applies only if the upload does not specify encryption; CodeBuild can override it.
- ✓
Grant the CodeBuild service role permission to use the KMS key via the key policy.
Why this is correct
Without permission, CodeBuild cannot use the KMS key to encrypt artifacts.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse default bucket encryption (Option D) with explicit artifact encryption in CodeBuild, not realizing that CodeBuild's buildspec encryption settings override bucket defaults and that the service role must have explicit KMS key permissions.
Detailed technical explanation
How to think about this question
Under the hood, CodeBuild uses the PutObject API call with the x-amz-server-side-encryption header set to 'aws:kms' and the x-amz-server-side-encryption-aws-kms-key-id header set to the specified KMS key ID. If the CodeBuild service role lacks kms:GenerateDataKey and kms:Decrypt permissions on the KMS key, the upload fails with an access denied error, making the key policy configuration in Option E essential.
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.
TExam Day Tips
- 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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this DOP-C02 question test?
SDLC Automation — This question tests SDLC Automation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: In the buildspec.yaml, set the 'artifacts' section to include 'encryptionDisabled: false' and specify the KMS key ID. — Option C is correct because setting 'encryptionDisabled: false' in the buildspec.yaml artifacts section explicitly enables encryption for the build output, and specifying the KMS key ID ensures that the artifacts are encrypted with that specific AWS KMS key. This configuration directly instructs CodeBuild to use server-side encryption with AWS KMS when uploading artifacts to S3.
What should I do if I get this DOP-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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