For which three requirements would you use the Database Resource Manager?
A.
specifying an idle time limit that applies to sessions that are idle and blocking other sessions
B.
limiting the degree of parallelism of operations performed by user sessions in a consumer group
C.
specifying the maximum number of concurrent sessions allowed for a user
D.
limiting the CPU used per database call
E.
specifying the amount of private space a session can allocate in the shared pool of the SGA.
Explanation:
http://docs.oracle.com/cd/B19306_01/server.102/b14231/dbrm.htm