Question 39

Answers A and D are correct. To achieve automatic failover of a mirrored database set, you must have the mirror configured for synchronous delivery, and you also need to have a witness configured. The witness actually identifies the state in which the failover is triggered.

For more information, see the following sources:

• Chapter 9, "Implementing High Availability"

• SQL Server 2005 Books Online: "SQL Server Database Engine, Administering the Database Engine, Database Mirroring, Database Mirroring Sessions, Role Switching During a Database Mirroring Session, Automatic Failover"