DP-900 Practice Question: Describe considerations for working with non-relational data on Azure
This DP-900 practice question tests your understanding of describe considerations for working with non-relational data on azure. 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.
Refer to the exhibit. You are reviewing an ARM template snippet for an Azure storage account. You need to ensure that the storage account supports POSIX-like permissions for data lake workloads. Which property must be enabled?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
"hierarchicalNamespace": {"enabled": true}
The exhibit shows that hierarchicalNamespace is enabled. This is required for Data Lake Storage Gen2, which supports POSIX ACLs. The question asks which property must be enabled; the answer is the hierarchical namespace. Option A is wrong because encryption key source is separate. Option C is wrong because data lake storage gen2 is not a property but the result. Option D is wrong because blob public access is unrelated.
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.
✗
"allowBlobPublicAccess": false
Why it's wrong here
This controls public access, not POSIX permissions.
✓
"hierarchicalNamespace": {"enabled": true}
Why this is correct
Enabling hierarchical namespace is required for Data Lake Storage Gen2 and POSIX ACLs.
Related concept
Standard ACLs match source addresses.
✗
"kind": "DataLakeStorageGen2"
Why it's wrong here
The kind is StorageV2 with hierarchical namespace enabled, not a separate kind.
✗
"keySource": "Microsoft.Storage"
Why it's wrong here
This controls encryption, not POSIX permissions.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this DP-900 question in full detail.
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-900 ACL questions on filtering logic and placement.
Describe considerations for working with non-relational data on Azure — This question tests Describe considerations for working with non-relational data on Azure — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: "hierarchicalNamespace": {"enabled": true} — The exhibit shows that hierarchicalNamespace is enabled. This is required for Data Lake Storage Gen2, which supports POSIX ACLs. The question asks which property must be enabled; the answer is the hierarchical namespace. Option A is wrong because encryption key source is separate. Option C is wrong because data lake storage gen2 is not a property but the result. Option D is wrong because blob public access is unrelated.
What should I do if I get this DP-900 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-900 ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
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Question Discussion
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