Quick Answer
The correct answer is to use access control lists (ACLs) on the folder. ACLs in Azure Data Lake Storage Gen2 allow you to set granular, POSIX-compliant permissions at the directory level, enabling you to control exactly which users or groups can read specific folders within a container while blocking access to others. This is distinct from RBAC roles, which apply broadly to the entire container, and from SAS tokens or shared keys, which operate at the container, file, or account level and lack folder-level granularity. On the DP-203 exam, this question tests your understanding of the layered security model in ADLS Gen2, where RBAC controls high-level access (e.g., storage account or container) and ACLs provide fine-grained control over directories and files. A common trap is confusing container-level RBAC with folder-level ACLs—remember that RBAC is for the “big picture,” while ACLs handle the “small print.” Memory tip: think of ACLs as “directory door locks” that let you open only specific rooms, not the whole building.
This DP-203 practice question tests your understanding of secure, monitor, and optimize data storage and data processing. 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 organization uses Azure Data Lake Storage Gen2 with hierarchical namespace enabled. You need to implement a security strategy that allows users to read only specific folders within a container. Which authorization method should you use?
Storage account shared key
Why wrong: Account-level access, not granular
Azure RBAC roles (e.g., Storage Blob Data Contributor) at the container level
Why wrong: Applies to entire container, not folder-level
Shared access signatures (SAS) with folder-level permissions
Why wrong: SAS cannot scope to a folder in ADLS Gen2
Access control lists (ACLs) on the folder
ACLs allow granular permissions at directory level
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Access control lists (ACLs) on the folder
Option C is correct because ACLs (Access Control Lists) can be set at the folder level in ADLS Gen2 to grant granular permissions to specific directories. Option A is wrong because RBAC roles at the container level apply to the entire container. Option B is wrong because SAS tokens grant access at the container or file level, not folder level. Option D is wrong because shared key is account-level access.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Storage account shared key
Why it's wrong here
Account-level access, not granular
Azure RBAC roles (e.g., Storage Blob Data Contributor) at the container level
Why it's wrong here
Applies to entire container, not folder-level
Shared access signatures (SAS) with folder-level permissions
Why it's wrong here
SAS cannot scope to a folder in ADLS Gen2
Access control lists (ACLs) on the folder
Why this is correct
ACLs allow granular permissions at directory level
Related concept
Authentication checks who the user is.
Common exam traps
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Detailed technical explanation
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Real-world example
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.
What to study next
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related DP-203 questions on access control and AAA configuration.
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FAQ
Secure, monitor, and optimize data storage and data processing — This question tests Secure, monitor, and optimize data storage and data processing — Authentication checks who the user is..
The correct answer is: Access control lists (ACLs) on the folder — Option C is correct because ACLs (Access Control Lists) can be set at the folder level in ADLS Gen2 to grant granular permissions to specific directories. Option A is wrong because RBAC roles at the container level apply to the entire container. Option B is wrong because SAS tokens grant access at the container or file level, not folder level. Option D is wrong because shared key is account-level access.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related DP-203 questions on access control and AAA configuration.
Authentication checks who the user is.
About these practice questions
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Same concept, more angles
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. You use Azure Data Lake Storage Gen2 with a hierarchical namespace. You need to delegate permissions to a group of data scientists so they can create folders and upload files only within a specific directory path. What is the best way to achieve this?
easyWhy B: Option B is correct because Azure Data Lake Storage Gen2 supports POSIX-like ACLs that can be set on directory paths to grant granular permissions. Option A is wrong because RBAC roles are scoped to the entire storage account or container, not subdirectories. Option C is wrong because SAS tokens are scoped to the entire storage account or container. Option D is wrong because access policies are for shared access signatures, not granular directory permissions.
Last reviewed: Jun 21, 2026
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.
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