Which problem is solved by migrating virtual machines (VMs) using vSphere vMotion?

Which software-defined, object-based storage solution provides shared storage for vSphere clusters without using traditional external storage?

A vSphere administrator needs to create an exact replica of a virtual machine as a safeguard prior to changing the virtual machine configuration.
Which vSphere feature accomplishes this requirement?

An administrator notices a virtual machine named vm01 is missing
from the inventory, but the configuration files can be located.
Which file should the administrator click on to register the VM?

Which vSphere feature protects against host hardware failures by restarting virtual machines (VMs) on hosts that are running in the cluster?