ESX Server employs two distinct techniques for dynamically expanding or contracting the amount of memory allocated to virtual machines:

A.
A memory balloon driver

B.
A RAM manager

C.
Paging from a host to a server swap file

D.
Paging from a virtual machine to a server swap file

Explanation:

ESX Server employs two distinct techniques for dynamically expanding or contracting the amount of memory allocated to virtual machines:
– A memory balloon driver (vmmemct1), loaded into the guest operating system running in a virtual machine, part of the VMware Tools package