The correct answer is to enable Azure Storage encryption with a customer-managed key and configure a key rotation policy in Azure Key Vault. This works because Azure Storage encryption natively supports customer-managed keys (CMKs) for encrypting data at rest, and when you store the CMK in Azure Key Vault, you can set a key rotation policy that automatically rotates the key every 90 days without any manual intervention or application downtime. On the Microsoft Azure Security Engineer Associate AZ-500 exam, this scenario tests your understanding of the separation between encryption responsibilities: Azure Storage encryption with CMK is the only option that combines server-side encryption with your own key and automated lifecycle management. A common trap is confusing this with Azure Disk Encryption, which encrypts VM disks, not storage account blobs, or with client-side encryption, which offloads rotation to your application. Memory tip: think “Storage + Key Vault policy = automatic rotation,” and remember that platform-managed keys cannot be rotated on your schedule.
AZ-500 Secure compute, storage, and databases Practice Question
This AZ-500 practice question tests your understanding of secure compute, storage, and databases. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
Your organization uses Azure Storage for sensitive customer data. You need to ensure that data at rest is encrypted using a customer-managed key (CMK) stored in Azure Key Vault. Additionally, you want to automatically rotate the key every 90 days. What should you configure?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable Azure Storage encryption with a customer-managed key and configure a key rotation policy in Azure Key Vault.
Option A is correct because Azure Storage encryption with CMK supports automatic key rotation via Key Vault key rotation policy. Option B is wrong because SSE with platform-managed key cannot use CMK. Option C is wrong because Azure Disk Encryption is for VMs, not storage accounts. Option D is wrong because client-side encryption shifts responsibility to the client and does not leverage Azure Key Vault automatic rotation.
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 Azure Disk Encryption on the storage account and store the key in Key Vault with rotation policy.
Why it's wrong here
Azure Disk Encryption applies to VM disks, not Azure Storage blobs.
✗
Enable server-side encryption with a platform-managed key and use Azure Policy to enforce rotation.
Why it's wrong here
Platform-managed keys cannot be customer-managed and Azure Policy cannot rotate keys.
✗
Use client-side encryption with .NET client library and implement custom rotation logic.
Why it's wrong here
Client-side encryption does not use Azure Key Vault rotation automatically.
✓
Enable Azure Storage encryption with a customer-managed key and configure a key rotation policy in Azure Key Vault.
Why this is correct
Azure Storage supports CMK from Key Vault with automatic rotation policy.
Related concept
Read the scenario before looking for a memorised answer.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-500 question in full detail.
Identify which AZ-500 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.
Secure compute, storage, and databases — This question tests Secure compute, storage, and databases — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable Azure Storage encryption with a customer-managed key and configure a key rotation policy in Azure Key Vault. — Option A is correct because Azure Storage encryption with CMK supports automatic key rotation via Key Vault key rotation policy. Option B is wrong because SSE with platform-managed key cannot use CMK. Option C is wrong because Azure Disk Encryption is for VMs, not storage accounts. Option D is wrong because client-side encryption shifts responsibility to the client and does not leverage Azure Key Vault automatic rotation.
What should I do if I get this AZ-500 question wrong?
Identify which AZ-500 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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