Windows Server 2008 for Itanium based System doess not provide server core installation
If the first word is supposed to be what and not when then the answer is Server Core.
Windows Server Core
File services
Server Core
servermanagercmd.exe -showroles
Server core
Server core
False. You cannot upgrade from Server Core to Full version unless you perform a complete operating system re-installation.
That question doesn't end with the word "is". In regards to your question: Start /w ocsetup DHCPServerCore
No, you have a choice when installing or downloading server 2008 as to whether or not you want the hyper-V technology. There are some core elements in most versions of Server 2008, but the complete functionality needs to be installed with the main installation.
No, it cannot. Once the core is installed it cannot be upgraded to any other version using a GUI.