AZ-900 Practice Question 36: Azure Files

Microsoft Azure Fundamentals (AZ-900) · Test 4 · question 6 of 10

Azure Architecturemedium

An application running on several Azure virtual machines, plus a file server still in the office, all need to read and write the same folder of documents using a standard Windows file share. The application cannot be modified. Which Azure Storage service should be used?

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Answer:

B. Azure Files, mounted over SMB by both the cloud and on-premises machines

Azure Files provides fully managed file shares in the cloud accessible through the industry-standard SMB and NFS protocols, and Azure file shares can be mounted *concurrently from cloud and on-premises clients* on Windows, Linux, and macOS with no additional software. That matches every clause of the stem, including "the application cannot be modified"; the share appears as an ordinary mapped drive.

Option A, Blob Storage, is object storage addressed over HTTP and REST. It is the right answer for images, backups, and logs, but it offers no file-share semantics to an application that expects a drive letter and a folder. Option C, Queue Storage, exists for asynchronous messaging between application components; it stores small messages to be picked up later, not shared documents. Option D, a managed disk, is block storage that belongs to a virtual machine. Attaching one "in turn" is the opposite of concurrent shared access, and an on-premises server cannot mount it at all.

Reference: What is Azure Files?

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