From the V$SESSION_LONGOPS view， you find that some of the database users have long-running queries that consume a lot of CPU time. This causes performance problems for other users in the database， who have much shorter queries. 
You would like to make sure that the users with large queries do not use all the CPU time， but you still do not want to terminate them with an error message. 
Which method would you follow to achieve this？（）

单项选择题From the V$SESSION_LONGOPS view， you find that some of the database users have long-running queries and are consuming a lot of CPU time. This causes problems for you when you try to log on as the system user and perform small maintenance tasks. You would like to ensure that users SYS and SYSTEM get priority over all other users.   Which method would you use to achieve this objective？（）

A.create a plan directive in the SYS_GROUP
B.create the pending area for the consumer group
C.activate the provided SYSTEM_PLAN in Resource Manager
D.set the TIMED_STATISTICS parameter to TRUE in the parameter file
E.set the execution time limit for all users， except SYS and SYSTEM， in their profiles

单项选择题SORT_AREASIZEandHASH_AREA_SIZEparametersareignoredinsomeoftheusersessions.Whatcouldbethereason？（）

A.The User Global Area （UGA） is not configured.
B.The sessions were started using the login name SYS.
C.The sessions are running in the Automatic Shared Memory Management mode.
D.The sessions are running in the automatic Program Global Area （PGA） memory management mode.

单项选择题Your database is running in the automatic Program Global Area （PGA） memory management and Shared Memory Management mode. You want to increase the memory available for the SQL work areas.  What would you do？（）

A.modify the HASH_AREA_SIZE initialization parameter
B.modify the PGA_AGGREGATE_TARGET initialization parameter
C.modify the WORK_AREASIZE_POLICY initialization parameter
D.increase the value of the SGA_TARGET initialization parameter
E.increase the value of the SGA_MAX_SIZE initialization parameter
F.increase the value of the SORT_AREA_SIZE initialization parameter

多项选择题You are working in a dedicated server environment. Your database is running in the automatic Program Global Area （PGA） memory management mode.   Which two statements are correct in this scenario？（）

A.The WORK_AREASIZE_POLICY initialization parameter cannot be set to AUTO.
B.The Oracle database automatically controls the amount of PGA memory allotted to SQL work areas.
C.Setting the value of the SGA_TARGET initialization parameter to 0 will disable the automatic PGA  memory management.
D.The SORT_AREA_SIZE parameter is ignored by all the sessions running in the automatic PGA  memory management mode.

单项选择题Yourdatabaseisusingsharedserverconfiguration.WhichoptionalmemorystructurewouldyouconfiguretostoretheUserGlobalArea（UGA）informationandimprovethesharedpoolperformance？（）

A.large pool
B.streams pool
C.keep buffer cache
D.recycle buffer cache