单项选择题
A.Modify the profile assigned to the user.
B.Modify the roles assigned to the users.
C.Modify the object privileges assigned to the user.
D.Modify the system privileges assigned to the users.
E.Modify the value for the RESOURCE_LIMIT parameter in the parameter file.
单项选择题 YoufindthatthedatabaseperformancedegradeswhileyoubackupthePRODdatabaseusingRecoveryManager（RMAN）.ThePRODdatabaseisrunninginsharedservermode.Thedatabaseinstanceiscurrentlyusing60%oftotaloperatingsystemmemory.Yoususpectthesharedpoolfragmentationtobethereason.Whichactionwouldyouconsidertoovercometheperformancedegradation？（）
单项选择题 WhichisthecorrectdescriptionofthesignificanceoftheORACLE_HOMEenvironmentalvariable？（）
多项选择题 YourdatabaseisconfiguredinNOARCHIVELOGmode.Allthecontrolfileshavebeenlostduetoaharddiskfailurebutthedatafilesarenotlost.Youhavetheclosedwholedatabasebackupavailabletoyou.Whichtwostatementsaretrueinthisscenario？（）