Your company has two offices.
Each office is configured as an Active Directory Site.
The sites are named Site1 and Site2.
You have an Exchange Server 2013 organization that is configured as shown in
the following exhibit. (Click the Exhibit button.)
Datacenter Activation Coordination (DAC) mode is enabled on
the Database Availability Group (DAG) named DAG1.
You are testing a Site Failover by shutting down all of the Servers in Site1.
You need to mount the Databases in Site2.
Which three commands should you run in sequence? 
Answer: 
Explanation:
Technet Reference: Datacenter SwitchOvers
According to Technet Datacenter Switchover KB
the correct order and selection for the question isas follow:
1. Stop-DatabaseAvailabilityGroup -ActiveDirectorySite:Site1
2. Stop-Service ClusSvc
3. Restore-DatabaseAvailabilityGroup -ActiveDirectorySite:Site2
http://technet.microsoft.com/en-us/library/dd351049.aspx
When the DAGis in DAC Mode, the specific actions to terminate any surviving DAGMembers in the primary
Datacenter are as follows:
1. Stop-DatabaseAvailabilityGroup
When the DAGis in DACMode, the steps to complete Activation of the Mailbox Servers in the Second
Datacenter are as follows:
2. Stop-Service ClusSvc
3. Restore-DatabaseAvailabilityGroup