A system administrator is preparing a host In a vSphere DRS cluster in partially automated mode for firmware patching and puts a host into maintenance mode. After several minutes, the host still has not entered maintenance mode.
How should the system administrator resolve this problem?

An administrator need to migrate a powered off virtual machine to
another cluster with no shared storage.
Which option should the administrator select for a successful migration?

Which two improvements to the management of a VM are gained when VMware Tools are used? (Choose two.)

An administrator has been asked to keep domain controllers running
on separate ESXi hosts.
Which type of VM/Host rule must be configured to meet this
requirement?

A vSphere administrator sees the alarm:
vSphere HA virtual machine failed to failover
This occurred for virtual machines (VMs) in a cluster with vSphere High Availability (HA) enabled. The guest operating system on the VMs did not report a power failure.
What is a possible cause of this event?