A company plans to use third-party application software to perform complex data analysis processes. The software will use up to 500 identical virtual machines (VMs) based on an Azure Marketplace VM image.
You need to design the infrastructure for the third-party application server. The solution must meet the following requirements:
The number of VMs that are running at any given point in time must change when the user workload

changes.
When a new version of the application is available in Azure Marketplace it must be deployed without

causing application downtime.
Use VM scale sets

Minimize the need for ongoing maintenance.

Which two technologies should you recommend? Each correct answer presents part of the solution.
NOTE: Each correct selection is worth one point.
Correct Answer: A,C
Explanation/Reference:
A: If your application demand increases, the load on the VM instances in your scale set increases. If this increased load is consistent, rather than just a brief demand, you can configure autoscale rules to increase the number of VM instances in the scale set.
C: Large scale sets require Azure Managed Disks.
Incorrect Asnwers:
B: By default, a scale set consists of a single placement group with a maximum size of 100 VMs. If a scale set property called singlePlacementGroup is set to false, the scale set can be composed of multiple placement groups and has a range of 0-1,000 VMs. When set to the default value of true, a scale set is composed of a single placement group, and has a range of 0-100 VMs.
Reference: https://docs.microsoft.com/en-us/azure/virtual-machine-scale-sets/virtual-machine-scale-sets- placement-groups