This DVA-C02 practice question tests your understanding of security. 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 wants to use AWS KMS to encrypt data in an S3 bucket. They need to rotate the CMK annually. Which key type should they use to enable automatic rotation?
AWS managed key (aws/s3)
Automatic rotation annually.
Customer managed key (CMK)
Why wrong: Manual rotation needed.
Custom key store
Why wrong: No automatic rotation.
AWS owned key
Why wrong: Not visible to customers.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
AWS managed key (aws/s3)
AWS managed keys (aws/s3) support automatic annual rotation automatically without any configuration. When you use an AWS managed key for S3, AWS KMS rotates the key material once every year, which satisfies the requirement for annual 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
For each option: why learners choose it and why it is or isn't the right answer here.
AWS managed key (aws/s3)
Why this is correct
Automatic rotation annually.
Related concept
Read the scenario before looking for a memorised answer.
Customer managed key (CMK)
Why it's wrong here
Manual rotation needed.
Custom key store
Why it's wrong here
No automatic rotation.
AWS owned key
Why it's wrong here
Not visible to customers.
Common exam traps
The trap here is that candidates often assume customer managed keys (CMKs) are the only way to get automatic rotation, but AWS managed keys (aws/s3) already provide automatic annual rotation without any setup, making them the correct choice for this specific requirement.
Detailed technical explanation
AWS KMS automatic rotation for AWS managed keys (aws/s3) creates new cryptographic material annually while retaining the old material for decryption of previously encrypted data. The key ID, ARN, and key policy remain unchanged, so applications using the key do not need modification. Under the hood, KMS uses a backing key that is rotated, and the old backing key is marked for deletion after a configurable waiting period, ensuring seamless transition.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
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FAQ
Security — This question tests Security — Read the scenario before looking for a memorised answer..
The correct answer is: AWS managed key (aws/s3) — AWS managed keys (aws/s3) support automatic annual rotation automatically without any configuration. When you use an AWS managed key for S3, AWS KMS rotates the key material once every year, which satisfies the requirement for annual rotation without manual intervention.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 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.
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