SC-100 Certification Practice Question #190

Question

You have an Azure subscription that contains the Azure Virtual Machine Scale Sets shown in the following table.

You are evaluating Azure Update Manager and automatic virtual machine guest patching.

Which virtual machine scale sets will automatic guest patching support?

Accepted Answer

Automatic VM guest patching has two hard requirements that both must be met. First, the VM/scale set must be created from a supported platform image — MS Learn states custom images and any non-listed publisher/offer/SKU combinations aren't supported, which eliminates VMSS2 and VMSS4. Second, for scale sets the orchestration comparison table shows in-guest security patching (Auto VM Guest Patching) is supported by Flexible orchestration but not by Uniform. VMSS1 (Flexible + Windows platform image) and VMSS3 (Flexible + Linux platform image) satisfy both conditions, so only those two are supported. Hameet's dissent inverts the orchestration support and is discounted against MS Learn.

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