- A
Create a private endpoint for the storage account and assign the data-scientists group to the private endpoint's access policy
Why wrong: Private endpoints control network access, not data permissions.
- B
Assign the Storage Blob Data Reader role to the data-scientists group at the storage account level and add a deny assignment for all other users
Why wrong: Deny assignments are not recommended for granular access; RBAC at storage account level would apply to all containers.
- C
Use a managed identity for the data-scientists group and assign the Storage Blob Data Contributor role to the managed identity
Why wrong: Managed identities are for applications, not user groups.
- D
Configure access control lists (ACLs) on the 'processed' container to grant read and execute permissions to the data-scientists group and set the default ACL to deny all
ACLs provide fine-grained access control at the container or directory level, suitable for this requirement.
DP-203 Practice Question: Secure, monitor, and optimize data storage and data processing
This DP-203 practice question tests your understanding of secure, monitor, and optimize data storage and 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.
Your company uses Azure Data Lake Storage Gen2 with hierarchical namespace enabled. You need to ensure that only the 'data-scientists' group can read files in the 'processed' container, while denying access to all other users. You have already configured the storage account firewall to allow access only from your corporate network. What should you do next?
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
Configure access control lists (ACLs) on the 'processed' container to grant read and execute permissions to the data-scientists group and set the default ACL to deny all
Option B is correct because ACLs are the mechanism to grant granular permissions to specific users/groups in ADLS Gen2 with hierarchical namespace. Option A is wrong because RBAC roles grant access at the storage account or container level, and a single deny assignment would block everyone. Option C is wrong because private endpoints control network access, not identity-based permissions. Option D is wrong because managed identity is used for service-to-service authentication, not for granting read access to a specific group.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Create a private endpoint for the storage account and assign the data-scientists group to the private endpoint's access policy
Why it's wrong here
Private endpoints control network access, not data permissions.
- ✗
Assign the Storage Blob Data Reader role to the data-scientists group at the storage account level and add a deny assignment for all other users
Why it's wrong here
Deny assignments are not recommended for granular access; RBAC at storage account level would apply to all containers.
- ✗
Use a managed identity for the data-scientists group and assign the Storage Blob Data Contributor role to the managed identity
Why it's wrong here
Managed identities are for applications, not user groups.
- ✓
Configure access control lists (ACLs) on the 'processed' container to grant read and execute permissions to the data-scientists group and set the default ACL to deny all
Why this is correct
ACLs provide fine-grained access control at the container or directory level, suitable for this requirement.
Related concept
Standard ACLs match source addresses.
Common exam traps
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
- Standard ACLs match source addresses.
- Extended ACLs can match source, destination, protocol and ports.
- The first matching ACL entry is used.
- There is usually an implicit deny at the end.
TExam Day Tips
- Check inbound versus outbound direction.
- Read the ACL from top to bottom.
- Look for a broader permit or deny above the intended line.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
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.
What to study next
Got this wrong? Here's your next step.
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related DP-203 ACL questions on filtering logic and placement.
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FAQ
Questions learners often ask
What does this DP-203 question test?
Secure, monitor, and optimize data storage and data processing — This question tests Secure, monitor, and optimize data storage and data processing — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Configure access control lists (ACLs) on the 'processed' container to grant read and execute permissions to the data-scientists group and set the default ACL to deny all — Option B is correct because ACLs are the mechanism to grant granular permissions to specific users/groups in ADLS Gen2 with hierarchical namespace. Option A is wrong because RBAC roles grant access at the storage account or container level, and a single deny assignment would block everyone. Option C is wrong because private endpoints control network access, not identity-based permissions. Option D is wrong because managed identity is used for service-to-service authentication, not for granting read access to a specific group.
What should I do if I get this DP-203 question wrong?
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related DP-203 ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
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Last reviewed: Jun 21, 2026
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