You have an enterprise root certification authority （CA） that runs Windows Server 2008 R2.    
You need to ensure that you can recover the private key of a certificate issued to a Web server.    
What should you do（）

单项选择题You need to back up all of the group policies in a domain.     The solution must minimize the size of the backup.     What should you use（）

A.the Add-WBSystemState cmdlet
B.the Group Policy Management console
C.the Wbadmin tool
D.the Windows Server Backup feature

单项选择题Your network contains an Active Directory domain.     You need to restore a deleted computer account from the Active Directory Recycle Bin.     What should you do（）

A.From the command prompt， run recover.exe.
B.From the command prompt， run ntdsutil.exe.
C.From the Active Directory Module for Windows PowerShell， run the Restore-Computer cmdlet.
D.From the Active Directory Module for Windows PowerShell， run the Restore-ADObject cmdlet.

单项选择题YournetworkcontainsanActiveDirectorydomain.ThedomaincontainstwodomaincontrollersnamedDC1andDC2. YouperformafullbackupofthedomaincontrollerseverynightbyusingWindowsServerBackup. YouupdateascriptintheSYSVOLfolder. Youdiscoverthatthenewscriptfailstorunproperly.YouneedtorestorethepreviousversionofthescriptintheSYSVOLfolder.Thesolutionmustminimizetheamountoftimerequiredtorestorethescript. Whatshouldyoudofirst（）

A.Run the Restore-ADObject cmdlet.
B.Restore the system state to its original location.
C.Restore the system state to an alternate location.
D.Attach the VHD file created by Windows Server Backup

单项选择题Your network contains an Active Directory domain. The domain contains two Active Directory  sites named Site1 and Site2. Site1 contains two domain controllers named DC1 and DC2. Site2  contains two domain controller named DC3 and DC4.   The functional level of the domain is Windows Server 2008 R2. The functional level of the forest  is Windows Server 2003.     Active Directory replication between Site1 and Site2 occurs from 20：00 to 01：00 every day. At  07：00， an administrator deletes a user account while he is logged on to DC1. You need to restore  the deleted user account. You want to achieve this goal by using the minimum amount of  administrative effort.     What should you do（）

A.On DC1， run the Restore-ADObject cmdlet.
B.On DC3， run the Restore-ADObject cmdlet.
C.On DC1， stop Active Directory Domain Services， restore the System State， and then start Active Directory Domain
D.On DC3， stop Active Directory Domain Services， perform an authoritative restore， and then start Active Directory Do

单项选择题Your network contains an Active Directory domain. The domain contains several domain  controllers.   All domain controllers run Windows Server 2008 R2.   You need to restore the Default Domain Controllers Policy Group Policy object （GPO） to the  Windows Server 2008 R2 default settings.     What should you do（）

A.Run dcgpofix.exe /target：dc.
B.Run dcgpofix.exe /target：domain.
C.Delete the link for the Default Domain Controllers Policy， and then run gpupdate.exe /sync.  
D.Delete the link for the Default Domain Controllers Policy， and then run gpupdate.exe /force.