An administrator runs a vSphere cluster containing database VMs with extremely heavy disk I/O. Database
VMs are placed on a costly all-flash array. The workloads are not memory intensive.
How can the administrator ensure the most cost-effective utilization of the all-flash storage array?

Using vSphere HA Orchestrated Restart an administrator places the most mission critical VM in the highest priority. After a host failure, the highest priority VM fails to restart while VMs in high priority restart.
What would cause this to occur?

What is required for host attestation to secure the hypervisor?

An administrator is unable to use the vSphere Client shutdown option on a Windows VM.
What should be installed to correct this?

A vSphere Administrator wants to group virtual machines by guest operating system type in vCenter Server.
Which feature would accomplish this?