Which three are among the various tasks performed by the data Guard Monitor (DMON) process?
A.
performing role transitions when switchover requests are made
B.
communicating with DMON processes in other database instances that are part of the broker configuration
C.
activating role-based services appropriately in the various database instances of the configuration, based
on the database role
D.
communicating with the DMON process of the observer to monitor a primary database in case a fast start
failover is required.
E.
maintaining information about all members of the broker configuration in binary configuration files
Explanation:
A: Oracle Enterprise Manager Cloud Control (Cloud Control) works with the Oracle Data Guard monitor to
automate and simplify the management of an Oracle Data Guard configuration.
With Cloud Control, the complex operations of creating and managing standby databases are simplified
through Oracle Data Guard management pages and wizards, including:* A switchover operation that helps you switch roles between the primary database and a standby database.
B (not D): The Oracle Data Guard monitor process (DMON) is an Oracle background process that runs on
every database instance that is managed by the broker.
E: The broker’s DMON process persistently maintains information about all members of the broker
configuration in a binary configuration file.
https://docs.oracle.com/database/121/DGBKR/concepts.htm#DGBKR050
A,B,E
From my point of view B,C,E are the correct answers.
Oracle Clusterware must be installed and active on the primary and standby sites for both single instance (using Oracle Restart) and Oracle RAC databases. Oracle Data Guard broker coordinates with Oracle Clusterware to properly fail over role-based services to a new primary database after a Data Guard failover has occurred.
https://docs.oracle.com/database/121/HABPT/config_fcf.htm#HABPT5304
Refer 10.3.2 Use Data Guard Broker
A,B,E