You must manually reinstate a database using DGMGRL.
To which database should you connect with DGMGRL before issuing the REINSTATE command and in which
state should the target database be?
A.
The target database should be in NOMOUNT state and DGMGRL should be connected to any database
that is a member of the configuration.
B.
The target database should be MOUNTED and DGMGRL should be connected to any database that is a
member of the configuration.
C.
The target database should be MOUNTED and DGMGRL should be connected to the primary database.
D.
The target database should be MOUNTED and DGMGRL should be connected to the target database.
E.
The target database should be in NOMOUNT state and DGMGRL should be connected to the primary
database.
Explanation:
To reinstate the failed primary database, start it to the mounted state. Then run DGMGRL, connect to the new
primary database and reinstate the old primary database.
https://docs.oracle.com/cd/B28359_01/server.111/b28295/cli.htm
C
Explanation:
To reinstate a database:
* Restart the database to the mounted state
* Connect to the new primary database
* Use Cloud Control or DGMGRL to reinstate the database
* The broker reinstates a failed primary database as a standby database of the same type (physical or logical standby database) as the old standby database. The only exception to this is failover to snapshot standby databases. In such cases, the failed primary database is reinstated as a physical standby database.
* The broker reinstates bystander standby databases that were disabled during a failover as standby databases to the new primary database.
https://docs.oracle.com/database/121/DGBKR/sofo.htm#DGBKR390
C is correct
C