Automated Patching depends on the SQL Server infrastructure as a service (IaaS) Agent Extension. The SQL Server IaaS Agent Extension (SqlIaasExtension) runs on Azure virtual machines to automate administration tasks. The SQL Server IaaS extension is installed when you register your SQL Server VM with the SQL Server VM resource provider.
Reference:
https://docs.microsoft.com/en-us/azure/azure-sql/virtual-machines/windows/sql-server-iaas-agent- extensionautomate-management Basic Concept: This question tests high availability and disaster recovery design for Azure SQL, SQL Server on Azure VMs, and regional failure scenarios.
Why D is Correct: Register VM1 to the Microsoft.SqlVirtualMachine resource provider is correct because it is the feature whose normal purpose matches the stated requirement. Register VM1 to the Microsoft.
SqlVirtualMachine resource provider is an Azure data-platform feature, but it must match the workload model, service tier, migration path, or deployment constraint described in the scenario. The scenario wording points to that specific behavior: You need to automate the maintenance of VM1 to meet the following requirements: Automate the patching of SQL Server and Windows Server.
Why A is Wrong: A managed identity gives an Azure resource an identity in Microsoft Entra ID so it can access services such as Key Vault without embedding credentials in code. It would solve a neighboring problem, but not the deployment, sizing, or migration requirement in this item.
Why B is Wrong: Register VM1 to the Microsoft.Sql resource provider is an Azure data-platform feature, but it must match the workload model, service tier, migration path, or deployment constraint described in the scenario. It mismatches the target platform, migration method, compute tier, or deployment model described in the scenario, so it would not satisfy the workload as stated.
Why C is Wrong: Install an Azure virtual machine Desired State Configuration (DSC) extension on VM1 is an Azure data-platform feature, but it must match the workload model, service tier, migration path, or deployment constraint described in the scenario. It applies to a different Azure data-platform design than the one the question is testing.