Microsoft Certified: Azure Fundamentals (AZ-900) Practice Exam

The correct answer is Azure Files. Azure Files provides a fully managed file share in the cloud that can be accessed via the Server Message Block (SMB) protocol. This makes it particularly useful for scenarios where applications require shared access to files from multiple virtual machines or different platforms.

Azure Files allows users to mount file shares directly on Windows and Linux systems, enabling file sharing across environments while managing it with the same SMB protocols that they typically use in on-premises environments. This compatibility facilitates easy migration of applications that rely on file shares.

In contrast, the other services mentioned do not offer direct SMB access. For instance, Cosmos DB is a NoSQL database service, Disk Storage provides block-level storage for virtual machines but is not accessed via SMB, and Azure Queue is designed for message storage and communication, rather than file sharing. Thus, Azure Files stands out as the service that directly supports SMB access.