You manage an Active Directory forestnamed contoso.com.
The forestcontains an empty root domainnamedcontoso.comand a child domainnamed child.contoso.
com.
All domain controllersrun Windows Server 2008.
The functional levelof the forestis Windows Server 2008.
You need to raise the functional level of the forest toWindows Server 2008 R2.
You must achieve this goal by using the minimum amount of administrative effort.
What should you do?
To answer, move the appropriate actions from the list of actions to the answer area and arrange them in the
correct order.
Answer: 
Explanation:
To upgrade the forest level to Windows Server 2008 R2 we need to upgrade the servers first. And beforewe
upgrade the servers we need to prepare the domain and forest using adprep.
Reference 1:
http://technet.microsoft.com/en-us/library/cc771949.aspx
Caution
Do not raise the forest functional level to WindowsServer 2008 R2 if you have or will have any domain
controllers running Windows Server 2008 or earlier.
Reference 2:
MCTS 70-640 Cert Guide: Windows Server 2008 Active Directory, Configuring (Pearson IT Certification, 2010)
page 96
The Adprep Utility
Microsoft provides the Adprep utility to prepare a down-level Active Directory domain for receiving Windows
Server 2008 and Windows Server 2008 R2 domain controllers. Found in the \sources\adprep folder of the
installation DVD-ROM, this tool prepares the forestand domain by extending the Active Directory schema and
updating several required permissions.
Running the Adprep /forestprepCommand
You must run the Adprep /forestprepcommand on the schema master of the forest first. It extends the
schema to receive the new Windows Server 2008 enhancements, including the addition of directory descriptors
for certain objects including granular password policies. You have to run this command and let its changes
replicate throughout the forest before you run the Adprep /domainprepcommand.
Reference 3:
Not really relevant, but some info on why using an empty root domain is no longer preferable:
http://blogs.technet.com/b/askds/archive/2010/05/07/friday-mail-sack-tweener-clipart-comics-edition.
aspx#adempty