- A
Enable automatic key rotation for the CMK in AWS KMS.
When enabled, AWS KMS automatically rotates the backing key of a CMK once per year, satisfying the compliance requirement.
- B
Create a new CMK every year and update the S3 bucket policy to use the new key.
Why wrong: This approach is manual, error-prone, and requires updating all references to the key, leading to high operational overhead.
- C
Use an AWS managed key (aws/s3) which automatically rotates annually.
Why wrong: AWS managed keys rotate annually, but they are not customer managed keys and do not allow customization of key policies or auditing as required by the company.
- D
Use SSE-S3 encryption with automatically rotated keys instead of KMS.
Why wrong: SSE-S3 provides server-side encryption with Amazon-managed keys that are rotated, but it does not allow the use of customer-managed keys or compliance tracking requirements.
DVA-C02 Security Practice Question
This DVA-C02 practice question tests your understanding of 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.
A company uses AWS KMS customer master keys (CMKs) to encrypt sensitive data in Amazon S3. A compliance requirement mandates that the backing keys for the CMKs be automatically rotated every year. The developer must implement this with minimal operational overhead. Which solution meets the requirement?
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
Enable automatic key rotation for the CMK in AWS KMS.
Option A is correct because AWS KMS supports automatic key rotation for customer managed CMKs. When enabled, KMS automatically rotates the backing key annually (approximately every 365 days) with no additional operational overhead. This satisfies the compliance requirement for yearly rotation without manual intervention.
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 automatic key rotation for the CMK in AWS KMS.
Why this is correct
When enabled, AWS KMS automatically rotates the backing key of a CMK once per year, satisfying the compliance requirement.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Create a new CMK every year and update the S3 bucket policy to use the new key.
Why it's wrong here
This approach is manual, error-prone, and requires updating all references to the key, leading to high operational overhead.
- ✗
Use an AWS managed key (aws/s3) which automatically rotates annually.
Why it's wrong here
AWS managed keys rotate annually, but they are not customer managed keys and do not allow customization of key policies or auditing as required by the company.
- ✗
Use SSE-S3 encryption with automatically rotated keys instead of KMS.
Why it's wrong here
SSE-S3 provides server-side encryption with Amazon-managed keys that are rotated, but it does not allow the use of customer-managed keys or compliance tracking requirements.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse AWS managed keys (which rotate automatically but not on a customer-defined schedule) with customer managed CMKs, or assume that manual key rotation is required when automatic rotation is available.
Detailed technical explanation
How to think about this question
When automatic key rotation is enabled for a customer managed CMK, AWS KMS creates new backing key material each year while retaining the old backing key material for decryption of previously encrypted data. The CMK ID, key ARN, and key policy remain unchanged, so no application changes are needed. The rotation does not affect the CMK's key ID or alias, ensuring seamless access to encrypted objects.
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.
- →
Security — study guide chapter
Learn the concepts, then practise the questions
- →
Security practice questions
Targeted practice on this topic area only
- →
All DVA-C02 questions
1,616 questions across all exam domains
- →
AWS Certified Developer Associate DVA-C02 study guide
Full concept coverage aligned to exam objectives
- →
DVA-C02 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related DVA-C02 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Development with AWS Services practice questions
Practise DVA-C02 questions linked to Development with AWS Services.
Security practice questions
Practise DVA-C02 questions linked to Security.
Deployment practice questions
Practise DVA-C02 questions linked to Deployment.
Troubleshooting and Optimization practice questions
Practise DVA-C02 questions linked to Troubleshooting and Optimization.
DVA-C02 fundamentals practice questions
Practise DVA-C02 questions linked to DVA-C02 fundamentals.
DVA-C02 scenario practice questions
Practise DVA-C02 questions linked to DVA-C02 scenario.
DVA-C02 troubleshooting practice questions
Practise DVA-C02 questions linked to DVA-C02 troubleshooting.
Practice this exam
Start a free DVA-C02 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this DVA-C02 question test?
Security — This question tests Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable automatic key rotation for the CMK in AWS KMS. — Option A is correct because AWS KMS supports automatic key rotation for customer managed CMKs. When enabled, KMS automatically rotates the backing key annually (approximately every 365 days) with no additional operational overhead. This satisfies the compliance requirement for yearly rotation without manual intervention.
What should I do if I get this DVA-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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Keep practising
More DVA-C02 practice questions
- A developer is troubleshooting an AWS Lambda function that is triggered by an S3 event. The function occasionally fails…
- A developer needs to call AWS APIs from application code running on EC2. Which credential source should the AWS SDK use…
- A developer needs to allow an IAM user in a different AWS account to assume a role in the developer's account. The role…
- A developer needs to grant an IAM role in Account B read-only access to objects in an S3 bucket in Account A. The bucket…
- An API Gateway HTTP API should allow access only to users authenticated by an external OIDC provider. Which authorizer t…
- A developer needs to allow an EC2 instance to read from a DynamoDB table. Which is the best practice to grant permission…
Last reviewed: Jun 11, 2026
This DVA-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 DVA-C02 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.