Configure a physical machine to host virtual guests

This is one of the easiest objectives for this exam, just issue the following commands to install the necessary packages:

yum groupinstall "Virtualization"
yum groupinstall "Virtualization Client"

There are a further two package groups related to virtualization, Virtualization Tools and Virtualization Platform, I don't think they are really needed, as they install libguestfs, which is a library for accessing and modifying guest disk images and libvirt,which is a C toolkit to interact with the virtualization capabilities of recent versions of Linux (and other OSes).

Strictly speaking the Virtualization Client group is not needed. You will need it in a server to create virtual machines and manage them, but it does not need to be installed in every server.