The correct answer is a layered combination of Azure RBAC and ACLs for authorization, a firewall with virtual network service endpoints, and diagnostic settings for auditing. This approach works because RBAC controls coarse access at the storage account level (e.g., who can manage the account), while ACLs provide fine-grained POSIX-style permissions on directories and files, together enforcing least privilege. The firewall and VNet service endpoints block all traffic from public endpoints and unauthorized Azure services, ensuring only traffic from approved virtual networks reaches the data. On the DP-203 exam, this scenario tests your understanding of defense-in-depth for ADLS Gen2, often appearing as a multi-select question where a common trap is choosing only RBAC or only ACLs, missing the need for both to cover control and data plane access. Remember the mnemonic “RAF” for this layered security: RBAC, ACLs, Firewall/VNet, plus Audit logs.
DP-203 Design and implement data storage Practice Question
This DP-203 practice question tests your understanding of design and implement data storage. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
A healthcare company stores sensitive patient data in Azure Data Lake Storage Gen2. They need to ensure that only authorized users can access data and that all access is audited. They also need to prevent data from being accessed by unauthorized Azure services. Which combination of security features should be used?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Azure RBAC and ACLs for authorization, enable firewall and virtual network service endpoints, and enable diagnostic settings for auditing.
Option B is correct because it combines Azure RBAC and ACLs for fine-grained authorization, a firewall with virtual network service endpoints to restrict access to authorized networks, and diagnostic settings to capture audit logs. This layered approach ensures that only authorized users can access the data, all access is audited, and unauthorized Azure services are blocked by the firewall and service endpoints.
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.
✗
Use a private endpoint and Azure AD authentication, disable public access.
Why it's wrong here
Private endpoint secures network but doesn't provide fine-grained access control.
✓
Use Azure RBAC and ACLs for authorization, enable firewall and virtual network service endpoints, and enable diagnostic settings for auditing.
Why this is correct
Combination provides layered security and full audit.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use managed identity for service access and disable public access.
Why it's wrong here
Doesn't restrict unauthorized Azure services unless combined with firewall.
✗
Use Azure AD authentication and SAS tokens for access, enabling diagnostic logs for auditing.
Why it's wrong here
SAS tokens are not fully auditable for individual user actions.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Microsoft often tests the misconception that disabling public access alone is sufficient to block unauthorized Azure services, when in fact service endpoints or private endpoints are required to prevent access from other Azure services within the same region.
Detailed technical explanation
How to think about this question
Azure Data Lake Storage Gen2 supports both RBAC (for control plane operations like listing containers) and POSIX-like ACLs (for data plane operations on files and directories). The firewall and virtual network service endpoints work together to restrict access to traffic from specific virtual networks, effectively blocking other Azure services that are not explicitly allowed. Diagnostic settings can be configured to send logs to a Log Analytics workspace or storage account for auditing, capturing details like the identity, IP address, and operation performed.
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.
Design and implement data storage — This question tests Design and implement data storage — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use Azure RBAC and ACLs for authorization, enable firewall and virtual network service endpoints, and enable diagnostic settings for auditing. — Option B is correct because it combines Azure RBAC and ACLs for fine-grained authorization, a firewall with virtual network service endpoints to restrict access to authorized networks, and diagnostic settings to capture audit logs. This layered approach ensures that only authorized users can access the data, all access is audited, and unauthorized Azure services are blocked by the firewall and service endpoints.
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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