The correct configuration is to enable the storage account firewall and add a private endpoint for Azure Databricks to use. This satisfies both security requirements by ensuring all data in transit is encrypted via TLS over the Microsoft backbone network, while the private endpoint, which uses Azure Private Link, keeps traffic entirely within the Azure network and prevents any public internet exposure. On the DP-203 exam, this scenario tests your understanding of how to secure Azure Databricks connectivity to ADLS Gen2, often appearing as a distractor where candidates mistakenly choose a service endpoint or VNet injection alone—both of which fail to fully block public access. The key trap is forgetting that a private endpoint is required to completely isolate the storage account, while the firewall then denies all other traffic. Remember the mnemonic: "Private blocks the public, firewall locks the door."
DP-203 Develop data processing Practice Question
This DP-203 practice question tests your understanding of develop data processing. 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.
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?
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.
Option A is correct because 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.
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 the storage account firewall and add a private endpoint for Azure Databricks to use.
Why this is correct
Private endpoint ensures private connectivity and encryption in transit.
Related concept
Read the scenario before looking for a memorised answer.
✗
Disable TLS on the storage account and use a shared access signature (SAS) token for authentication.
Use Azure Databricks with VNet injection and configure a service endpoint for the storage account.
Why it's wrong here
Azure Databricks does not support VNet service endpoints for storage; it requires private endpoints.
✗
Configure the storage account to use HTTPS only and enable firewall rules to allow only Azure services.
Why it's wrong here
This still allows access from the public internet via Azure services.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is confusing 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.
Detailed technical explanation
How to think about this question
Azure Private Endpoint uses a network interface with a private IP from your VNet, mapping to the storage account's blob or DFS endpoint. Traffic flows over the Microsoft backbone, bypassing the public internet entirely, and is encrypted with TLS 1.2+ by default. In contrast, service endpoints rely on public endpoints with route optimization, meaning the storage account's public DNS name resolves to a public IP, even if traffic is forced through the Azure backbone via the service endpoint policy.
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.
TExam Day Tips
→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 DP-203 question in full detail.
Develop data processing — This question tests Develop data processing — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable the storage account firewall and add a private endpoint for Azure Databricks to use. — Option A is correct because 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.
What should I do if I get this DP-203 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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