DP-900 Practice Question: Describe considerations for working with non-relational data on Azure
Your team needs to store unstructured data such as documents, images, and videos for a data lake analytics project. The data will be processed by Azure Data Lake Storage Gen2. Which storage account type should you create?
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
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StorageV2 (general-purpose v2) with hierarchical namespace enabled
The correct option is A: StorageV2 (general-purpose v2) with hierarchical namespace enabled. Azure Data Lake Storage Gen2 is not a separate account type; it is implemented by enabling a hierarchical namespace on a general-purpose v2 (StorageV2) storage account, which supports Blob storage with POSIX-like directory semantics for analytics workloads. BlobStorage (B) is a legacy account type that does not support the hierarchical namespace required for ADLS Gen2. QueueStorage (C) is for message queues, and FileStorage (D) is for SMB file shares, neither of which provides the data lake capabilities needed here.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
StorageV2 (general-purpose v2) with hierarchical namespace enabled
Why this is correct
StorageV2 with hierarchical namespace enabled is the account type that provides Azure Data Lake Storage Gen2 capabilities, including a true directory structure and POSIX-style ACLs, which the analytics workload requires for efficient unstructured data processing.
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BlobStorage
Why it's wrong here
BlobStorage is a legacy account type that lacks the hierarchical namespace required for Azure Data Lake Storage Gen2, so POSIX-style directory operations and atomic renames fail. It suits plain object storage for blobs served over HTTP without analytics filesystem semantics.
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QueueStorage
Why it's wrong here
QueueStorage stores small messages for asynchronous processing between application components; it cannot hold documents, images or videos, and offers no hierarchical namespace for Azure Data Lake Storage Gen2. It suits decoupling app tiers via message queues, not data lake storage.
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FileStorage
Why it's wrong here
FileStorage provides SMB and NFS file shares, not the hierarchical namespace that Azure Data Lake Storage Gen2 requires for directory-level analytics operations. It suits lift-and-shift file share workloads needing protocol-level access, not data lake ingestion.
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Key term
Blob storage
Blob storage is a cloud service for storing large amounts of unstructured data, such as text or binary data, like documents, images, and videos.
Key term
Data lake
A data lake is a centralized storage repository that holds vast amounts of raw data in its native format until it is needed for analysis.
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