DP-203 Practice Question: Secure, monitor, and optimize data storage and data processing
You need to secure data at rest for an Azure Data Lake Storage Gen2 account that contains sensitive financial data. Which configuration should you enable to ensure that data is encrypted using a customer-managed key stored in Azure Key Vault, and that access to the key is logged?
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
✓
Configure Azure Storage encryption with customer-managed keys in Azure Key Vault and enable Key Vault logging
Azure Storage encryption with customer-managed keys in Key Vault provides control and logging. Option A is wrong because Microsoft-managed keys are the default but do not provide customer control. Option B is wrong because client-side encryption requires managing keys on the client side. Option C is wrong because infrastructure encryption adds a second layer but does not use customer-managed keys.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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Enable Azure Storage encryption with Microsoft-managed keys
Why it's wrong here
Microsoft-managed keys encrypt the account, but the customer cannot supply or audit a key held in Azure Key Vault, so the customer-managed key and key-access logging requirements go unmet. It is tempting because it is the default at-rest encryption for storage accounts, and it would be correct where no customer key control or key audit trail is mandated.
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Implement client-side encryption using Azure Key Vault
Why it's wrong here
Client-side encryption protects blobs before upload, but the storage service itself still encrypts at rest with platform-managed keys, so the account is not configured to use a customer-managed key with logged key access. It is tempting because it gives the customer key ownership, and it would be correct when data must be encrypted before reaching Azure.
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Enable infrastructure encryption for double encryption
Why it's wrong here
Infrastructure encryption adds a second encryption layer at the hardware level, yet both layers can remain platform-managed, so no customer-managed key in Azure Key Vault is used and key access is not logged. It is tempting because it strengthens at-rest protection, and it would be correct where regulation demands double encryption rather than customer key control.
- ✓
Configure Azure Storage encryption with customer-managed keys in Azure Key Vault and enable Key Vault logging
Why this is correct
Customer-managed keys in Azure Key Vault replace Microsoft-managed keys for storage encryption, and enabling Key Vault logging records every key access. Together these satisfy both the CMK encryption requirement and the key-access auditing constraint for the financial data.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DP-203 practice question is part of Courseiva's free Microsoft 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 DP-203 exam.