HOTSPOT You have an Azure subscription. You plan to deploy two 100-virtual machine deployments as shown in the following table. 
You need to recommend a virtual machine grouping solution for the deployments. What should you include in the recommendation for each deployment? To answer, select the appropriate options in the answer area. NOTE: Each correct selection is worth one point. 
Yeah, I'd say both deployments need a VM scale set in flexible orchestration mode. Flexible is the only option that lets you have different OS types within the same set and also works across availability zones, which you can't do with availability sets or uniform mode. Pretty sure that's what's expected here, but let me know if I missed any edge case.
Both deployments need VMSS in flexible mode. Only that option supports mixed OS and availability zone placement at scale, which neither availability sets nor uniform VMSS can do. Seen similar wording on practice exams. I’m like 95% sure but let me know if there’s a new Azure feature I missed!
Yeah, both deployments need flexible mode in VMSS because of the mixed OS images and zone support. Availability sets don't cut it when you have different OS types or cross-zone requirements. I think this matches what Microsoft is pushing lately, but happy to see if anyone finds a niche scenario.
Had something like this in a mock and picked availability sets for both. Thought they fit since update domains and proximity placement groups are supported, plus you get some high availability by default. Maybe I'm missing the mixed OS issue though, not 100% sure here. Agree?
