单项选择题
A.ALTER USER DEFAULT ROLE ALL
B.ALTER USER DEFAULT ROLE ALL EXCEPT ROLE_1
C.ALTER USER DEFAULT ROLE NONE
D.ALTER USER DEFAULT ROLE NONE EXCEPT ROLE_1
单项选择题 YouaredefiningareasonyourOracledatabase.Whichofthefollowingprofileareascanbeusedtocontroltheresourceusagefortheotherfour?（）
单项选择题 Inasituationwherenomultiplexingofredologstakesplace,whathappenswhenOraclecannotreaddatafromtheonlineredologgroupforarchiving?（）
单项选择题 YouareanalyzinghowOracleprocessesuserstatements.SQLandPL/SQLparseinformationisstoredinwhichofthefollowingdatabasememoryareas?（）