DP-203 Develop data processing Practice Question
You are designing a data processing solution in Azure Databricks. The data is stored in Azure Data Lake Storage Gen2 and you need to perform transformations using Apache Spark. The security requirements mandate that all data in transit must be encrypted and that the storage account must not be accessible from the public internet. What should you configure?
⚠ Common exam trap
Watch out — candidates often confuse service endpoints (which still use public endpoints) with private endpoints (which use private IPs and fully isolate the resource from the internet), leading candidates to pick Option C thinking VNet injection plus service endpoints provides complete public internet isolation.
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 the storage account firewall and add a private endpoint for Azure Databricks to use.
It satisfies both security requirements: encrypting data in transit and preventing public internet access. A private endpoint uses Azure Private Link to connect Azure Databricks to the storage account over the Microsoft backbone network, ensuring all traffic stays within the Azure network and is encrypted via TLS. The storage account firewall is then configured to deny all public traffic, so only the private endpoint can access the storage account, meeting the 'not accessible from the public internet' mandate.
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 the storage account firewall and add a private endpoint for Azure Databricks to use.
Why this is correct
A private endpoint gives Azure Databricks a private IP path to the storage account, removing public internet exposure, while the storage firewall blocks all other networks. Traffic over this private link is encrypted in transit, satisfying both stated requirements.
- ✗
Disable TLS on the storage account and use a shared access signature (SAS) token for authentication.
Why it's wrong here
Disabling TLS removes encryption in transit outright, breaching the mandate, and a SAS token authenticates without restricting network exposure. It is tempting because SAS tokens scope access granularly, but they operate at the authorisation layer and cannot substitute for transport encryption or private endpoint isolation.
- ✗
Use Azure Databricks with VNet injection and configure a service endpoint for the storage account.
Why it's wrong here
A service endpoint still routes traffic over the Azure backbone with the storage account's public endpoint enabled, so public network access is not disabled. It is tempting because service endpoints restrict subnet access, but private endpoints, which assign a private IP and remove public exposure, are required here.
- ✗
Configure the storage account to use HTTPS only and enable firewall rules to allow only Azure services.
Why it's wrong here
HTTPS-only plus allowing all Azure services leaves the storage account reachable from the public internet via its public endpoint, failing the isolation requirement. It is tempting because HTTPS satisfies encryption in transit, but Azure-services firewall rules are broad and do not provide private connectivity from the Databricks VNet.
Go deeper
Related to this question
Learn chapter
Implement Data Encryption and Access Control
Key term
Azure Databricks
Azure Databricks is a fast, easy, and collaborative Apache Spark-based analytics platform optimized for Azure that lets data teams prepare data, run machine learning models, and build data pipelines using a single workspace.
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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.