DP-203 Design and implement data storage Practice Question
You are designing a data storage solution for an Azure Data Lake Storage Gen2 account that will store sensitive customer data. The solution must enforce that all data is encrypted at rest using customer-managed keys (CMK) stored in Azure Key Vault. Additionally, you need to prevent data from being accessed by any Azure service except Azure Synapse Analytics. Which combination of configurations should you implement?
⚠ Common exam trap
Test-takers frequently confuse service endpoints with private endpoints or SAS tokens, thinking any network restriction or key management approach will suffice, but the question specifically requires both CMK and service-specific access control, which only a service endpoint for Azure Synapse Analytics combined with a firewall provides.
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 Azure Storage encryption with customer-managed keys stored in Azure Key Vault and configure a firewall with a service endpoint for Azure Synapse Analytics
It combines two essential controls: Azure Storage encryption with customer-managed keys (CMK) stored in Azure Key Vault ensures data is encrypted at rest using keys you control, and a firewall with a service endpoint for Azure Synapse Analytics restricts network access so that only traffic from Azure Synapse Analytics can reach the storage account. This meets both the encryption and access restriction requirements.
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 Storage encryption with customer-managed keys stored in Azure Key Vault and configure a firewall with a service endpoint for Azure Synapse Analytics
Why this is correct
This combination provides CMK encryption and restricts network access to Azure Synapse Analytics only.
- ✗
Enable Azure Storage encryption with customer-managed keys and use a shared access signature (SAS) token for Azure Synapse Analytics
Why it's wrong here
SAS tokens do not prevent other services from accessing the data if they have the token.
- ✗
Enable Azure Storage encryption with customer-managed keys and assign an Azure Policy denying public network access
Why it's wrong here
Azure Policy can deny public access but does not restrict access to a specific service like Azure Synapse Analytics.
- ✗
Enable Azure Storage encryption with Microsoft-managed keys and configure a private endpoint
Why it's wrong here
Microsoft-managed keys do not meet the requirement for customer-managed keys, and private endpoints do not restrict access to a specific service.
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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.