The correct choice is to use Azure RBAC at the resource group level combined with ACLs on directories. This works because Azure Data Lake Storage Gen2 supports a two-tier access control model: Azure RBAC provides coarse-grained control at the subscription or resource group scope, while POSIX-like ACLs enable fine-grained, sensitivity-based access directly on directories and files. By applying ACLs to specific folders, you can enforce read, write, and execute permissions per directory, creating a logical separation of data by sensitivity level without compromising security. On the Microsoft Azure Data Engineer Associate DP-203 exam, this scenario tests your understanding of how to layer access controls in a data lake, often appearing as a distractor where candidates mistakenly choose only RBAC or only ACLs. A common trap is forgetting that RBAC alone cannot restrict access to individual directories. Memory tip: think “RBAC for the big picture, ACLs for the fine print.”
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.
Your company uses Azure Data Lake Storage Gen2 for a data lake. You need to implement a folder structure that separates data by sensitivity level. Which access control method should you use?
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 at the resource group level and ACLs on directories
Option C is correct because Azure Data Lake Storage Gen2 supports both Azure RBAC at the resource group level for coarse-grained control and POSIX-like ACLs on directories for fine-grained, sensitivity-based access. This combination allows you to assign read/write/execute permissions per directory, enabling a folder structure that separates data by sensitivity level without compromising security.
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 storage account firewall and virtual network service endpoints
Why it's wrong here
D is wrong because firewall restricts network access, not folder-level access.
✗
Use storage account keys for all access
Why it's wrong here
A is wrong because keys grant full access to the entire account.
✓
Use Azure RBAC at the resource group level and ACLs on directories
Why this is correct
C is correct because RBAC provides coarse control and ACLs provide fine-grained folder-level permissions.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use shared access signatures (SAS) for each folder
Why it's wrong here
B is wrong because SAS tokens apply to the entire container or directory, not easily per folder.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse network-level controls (firewall, VNet) or shared access signatures with the directory-level ACLs required for sensitivity-based folder separation, overlooking that only ACLs provide the POSIX-style granularity needed for hierarchical data lakes.
Detailed technical explanation
How to think about this question
Under the hood, Azure Data Lake Storage Gen2 implements a hierarchical namespace that supports POSIX-compliant ACLs (owner, owning group, and named users/groups) with standard permissions (read, write, execute). RBAC roles like Storage Blob Data Owner or Contributor apply at the resource group or storage account level, while ACLs override RBAC at the directory or file level, allowing fine-grained control. In a real-world scenario, you might assign RBAC to a data engineering team for broad access and use ACLs to restrict sensitive directories (e.g., PII) to specific security groups.
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 at the resource group level and ACLs on directories — Option C is correct because Azure Data Lake Storage Gen2 supports both Azure RBAC at the resource group level for coarse-grained control and POSIX-like ACLs on directories for fine-grained, sensitivity-based access. This combination allows you to assign read/write/execute permissions per directory, enabling a folder structure that separates data by sensitivity level without compromising security.
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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