AZ-900 Describe Azure architecture and services Practice Question

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✗

  Azure Blob Storage

  Why it's wrong here

  Azure Blob Storage is a highly scalable object storage service designed for storing massive amounts of unstructured data, such as images, videos, logs, and backups. It is accessed via HTTP/HTTPS using REST APIs or SDKs, not through the Server Message Block (SMB) protocol needed for network file shares. While tools like AzCopy or third-party drivers can upload or download blobs, Blob Storage does not natively support mounting as a mapped drive or file-level access with features like file locks. Therefore, it cannot serve as a shared network file share for multiple users or applications.

• ✓

  Azure Files

  Why this is correct

  Azure Files provides fully managed cloud file shares that use the Server Message Block (SMB) and Network File System (NFS) protocols, making them directly mountable as network drives on Windows, Linux, and macOS. It supports standard file share features such as file locking, ACLs, and snapshotting, and it works with Azure File Sync to cache on-premises servers. Existing applications that rely on UNC paths or drive mappings can access Azure Files without code changes, offering a seamless lift-and-shift for on-premises file shares. This precisely matches the requirement of a shared network file share.

• ✗

  Azure Disk Storage

  Why it's wrong here

  Azure Disk Storage provides block-level storage in the form of virtual hard disks (VHDs) attached to a single Azure virtual machine. These disks are not exposed over the network using SMB or NFS; instead, they appear as local disks to that specific VM. While a disk can be flagged as a shared disk and attached to multiple VMs, that requires enabling clustering and is designed for high-availability database workloads, not for general-purpose file shares. As a result, Disk Storage does not offer the straightforward network-mounted file share experience that Azure Files provides.

• ✗

  Azure Data Lake Storage

  Why it's wrong here

  Azure Data Lake Storage Gen2 is a data lake solution built on Azure Blob Storage, adding a hierarchical namespace and Hadoop-compatible access (ABFS) for big data analytics workloads. It is optimized for massively parallel processing by distributed analytics engines like Spark, Hive, and Azure Databricks, not for end-user file sharing over SMB. Data Lake Storage cannot be mounted as a network drive for typical file access, and it lacks the native file share management features such as SMB file locking and Windows-style permissions. Therefore, it is unsuitable for a shared network file share used by standard client applications.