You need to recommend which virtual machines to use to host App1. The solution must meet the technical requirements for KeyVault1. Which virtual…

Azure Key Vault–backed features (for example, Azure Disk Encryption, certificate/secret retrieval through a managed identity, or a disk-encryption set) can be used by any Azure virtual machine whose operating system is on Microsoft’s supported-OS list:

• Windows Server 2008 R2 SP1 or later

• Modern Linux distributions on kernel 3.4 +

The scenario gives four VMs (VM1-VM4) and imposes a requirement that the VM(s) hosting App1 must be able to integrate with KeyVault1. Because every listed VM meets the supported-OS requirement and any Azure VM can be enabled for a system-assigned managed identity and granted access policies in Key Vault, all four VMs are suitable. Selecting the complete set (VM1, VM2, VM3, VM4) satisfies the Key Vault technical constraint while not excluding capacity, availability-zone, or scale considerations.

A. Ignores other equally capable VMs, limiting capacity and resiliency.

B. Omits VM3 & VM4, unnecessarily reducing availability and scale.

C. Excludes VM3, breaking potential zone-redundancy and capacity goals.

1. Microsoft Azure – “Azure Disk Encryption overview”

Supported operating systems section (Docs ID: azure/virtual-machines/disk-encryption-overview)

2. Microsoft Azure – “Use managed identities to access Azure Key Vault”

Prerequisites and Supported resources sections (Docs ID: azure/key-vault/general/about-managed-identity)

3. Microsoft Azure – “Azure Key Vault best practices”

Security Baselines → Virtual Machines can access Key Vault through managed identities (Docs ID: azure/key-vault/general/best-practices)