A domain controller named DC12 runs critical services. Restructuring of the organizational unit  hierarchy for the domain has been completed and unnecessary objects have been deleted.  You need to perform an offline defragmentation of the Active Directory database on DC12. You also need  to ensure that the critical services remain online.  What should you do（）

You network consists of a single Active Directory domai...

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You network consists of a single Active Directory domain. All domain controllers run Windows Server  2008 R2.  
You need to reset the Directory Services Restore Mode （DSRM） password on a domain controller.   What tool should you use（）

Your company has a domain controller server that runs t...

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Your company has a domain controller server that runs the Windows Server 2008 R2 operating  system. The server is a backup server. The server has a single 500-GB hard disk that has three partitions  for the operating system， applications， and data. You perform daily backups of the server.  
The hard disk fails. You replace the hard disk with a new hard disk of the same capacity. You restart the  computer on the installation media. You select the Repair your computer option.  You need to restore the operating system and all files.  
What should you do（）

Your company has an Active Directory domain that runs W...

单项选择题

Your company has an Active Directory domain that runs Windows Server 2008 R2. The Sales OU  
contains an OU for Computers， an OU for Groups， and an OU for Users. You perform nightly backups. An administrator deletes the Groups OU.   
You need to restore the Groups OU without affecting users and computers in the Sales OU.   
What should you do（）