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Describe core data concepts →easyMultiple ChoiceObjective-mapped

Quick Answer

The answer is that the isHnsEnabled property enables a hierarchical namespace for the storage account. This is correct because, when set to true, it transforms a standard flat blob storage account into Azure Data Lake Storage Gen2, allowing blobs to be organized into a directory hierarchy with POSIX-like access control lists and file system semantics. On the DP-900 exam, this property tests your understanding of how Azure Storage supports big data analytics workloads—a common trap is confusing it with enabling blob soft delete or versioning, but isHnsEnabled specifically unlocks the file-system structure. Remember that HNS stands for Hierarchical Namespace, so think of it as the switch that turns a flat container into a navigable folder tree, which is essential for tools like Azure Databricks or HDInsight. A helpful memory tip: HNS = “Has Nested Structure,” so if you need directories and ACLs, set isHnsEnabled to true.

DP-900 Describe core data concepts Practice Question

This DP-900 practice question tests your understanding of describe core data concepts. 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.

Exhibit

{
  "identity": {
    "type": "UserAssigned",
    "userAssignedIdentities": {
      "/subscriptions/12345/resourceGroups/rg1/providers/Microsoft.ManagedIdentity/userAssignedIdentities/id1": {}
    }
  },
  "properties": {
    "isHnsEnabled": true,
    "encryption": {
      "keySource": "Microsoft.Storage"
    }
  }
}

Refer to the exhibit. You are deploying an Azure Storage account. The JSON snippet represents a template parameter. What does the 'isHnsEnabled' property enable?

Question 1easymultiple choice
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Exhibit

{
  "identity": {
    "type": "UserAssigned",
    "userAssignedIdentities": {
      "/subscriptions/12345/resourceGroups/rg1/providers/Microsoft.ManagedIdentity/userAssignedIdentities/id1": {}
    }
  },
  "properties": {
    "isHnsEnabled": true,
    "encryption": {
      "keySource": "Microsoft.Storage"
    }
  }
}

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

✓

Hierarchical namespace for the storage account

The 'isHnsEnabled' property enables the hierarchical namespace for the storage account, which is a core feature of Azure Data Lake Storage Gen2. When set to true, it allows the storage account to organize blobs into a directory hierarchy, enabling POSIX-like access control lists (ACLs) and file system semantics. This is essential for big data analytics workloads that require a file system structure rather than a flat blob storage model.

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.

  • ✗

    Blob versioning

    Why it's wrong here

    Controlled by a different property.

  • ✗

    Soft delete for blobs

    Why it's wrong here

    Controlled by a different property.

  • ✗

    Geo-redundant storage

    Why it's wrong here

    Controlled by the sku property.

  • ✓

    Hierarchical namespace for the storage account

    Why this is correct

    Enables Data Lake Storage Gen2 capabilities.

    Related concept

    Read the scenario before looking for a memorised answer.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates often confuse 'isHnsEnabled' with blob-level features like versioning or soft delete, because all three are related to data management, but only the hierarchical namespace fundamentally changes the storage account's architecture to support file system semantics.

Detailed technical explanation

How to think about this question

Under the hood, enabling the hierarchical namespace restructures the blob storage endpoint to support directory operations, such as atomic rename and recursive delete, which are not possible in a flat namespace. This is implemented by mapping directory paths to internal metadata structures, allowing Azure Data Lake Storage Gen2 to provide Hadoop Distributed File System (HDFS) compatibility via the ABFS driver. A real-world scenario is using Azure Databricks or HDInsight to process data stored in a hierarchical namespace, where directory-level security and efficient path-based queries are critical.

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.

What to study next

Got this wrong? Here's your next step.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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FAQ

Questions learners often ask

What does this DP-900 question test?

Describe core data concepts — This question tests Describe core data concepts — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Hierarchical namespace for the storage account — The 'isHnsEnabled' property enables the hierarchical namespace for the storage account, which is a core feature of Azure Data Lake Storage Gen2. When set to true, it allows the storage account to organize blobs into a directory hierarchy, enabling POSIX-like access control lists (ACLs) and file system semantics. This is essential for big data analytics workloads that require a file system structure rather than a flat blob storage model.

What should I do if I get this DP-900 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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Last reviewed: Jun 24, 2026

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This DP-900 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-900 exam.