You saved VM1 as an ARM template named Template1 and will deploy VM2 from Template1. Which of these settings can you specify at deployment time for VM2?

When deploying an Azure Resource Manager (ARM) template, you can specify the resource group at deployment time. This is because the resource group is a logical container for Azure resources and is typically defined as a parameter in the ARM template, allowing you to choose where the resources will be deployed. You cannot specify the operating system, administrator username, or virtual machine size at deployment time if these values are hardcoded within the ARM template. While these can be parameterized in a template, the question states you are deploying VM2 from Template1, implying Template1 is a pre-existing template. If Template1 was saved from an existing VM1, it's highly likely these specific settings (OS, admin username, VM size) would be hardcoded within the template definition itself, making them fixed for subsequent deployments using that exact template. To change them, you would need to modify Template1 or provide a separate parameters file if the template was designed with parameters for these values.