You have a server named Data1 that runs a Server Core Installation of Windows Server 2012 R2
Standard.
You need to configure Data1 to run a Server Core Installation of Windows Server 2012 R2 Datacenter.
You want to achieve this goal by using the minimum amount of administrative effort.
What should you perform?

A.
An online servicing by using Dism

B.
An offline servicing by using Dism

C.
An upgrade installation of Windows Server 2012 R2

D.
A clean installation of Windows Server 2012 R2

Explanation:
A)
Not least effort
B)
Not least effort
C)
dism /online /set-edition
D)
offline would be less ideal and more workex: DISM /online /Set-Edition:ServerEnterprise /
ProductKey:489J6-VHDMP-X63PK-3K798-CPX3YWindows Server 2008 R2/2012 contains a command-line
utility called DISM (Deployment Image Servicing andManagement tool). This tool has many features, but
one of those features is the ability to upgrade the edition ofWindows in use. Note that this process is for
upgrades only and is irreversible. You cannot set a Windowsimage to a lower edition. The lowest edition
will not appear when you run the /Get-TargetEditions option. If the server is running an evaluation
version of Windows Server 2012
R2 Standard or Windows Server 2012 R2Datacenter, you can convert it to a retail version as follows:
If the server is a domain controller, you cannot convert it to a retail version. In this case, install an
additionaldomain controller on a server that runs a retail version and remove AD DS from the domain
controller thatruns on the evaluation version. From an elevated command prompt, determine the
current edition name with the command DISM /online /Get-CurrentEdition. Make note of the edition ID,
an abbreviated form of the edition name. Then run DISM /online /Set-Edition:<edition ID>
/ProductKey:XXXXXXXXXX-XXXXX-XXXXXXXXXX
/AcceptEula,providing the edition ID and a retail product key.
The server will restart twice.
http://technet.microsoft.com/en-us/library/jj574204.aspx
http://technet.microsoft.com/en-us/library/dd744380%28v=ws.10%29.aspx
http://blogs.technet.com/b/server_core/archive/2009/10/14/upgrading- windows-server2008-r2-
without-media.aspx
http://communities.vmware.com/people/vmroyale/blog/2012/05/30/howto-upgradingwindowsedition-with-dism