You are creating tablespaces in Oracle. Which of the following keywords or clauses permits the datafiles of a database to grow automatically in order to accommodate data growth?（）

单项选择题YouhaveimplementedOMFforredologmanagement.WhichofthefollowingchoicesreflectsalogfilenamethatmightbeemployedwhenOMFisenabled?（）

A.log01.log 
B.logORCL01.log 
C.1_2.logALTER ROLLBACK SEGMENT 
D.ora_1_asdf1234.log

单项选择题WhichofthefollowingoperationsdoesnotrequireOracletostoreinformationinanUNDOsegmentsaspartofthetransaction?（）

A.INSERT 
B.SELECT 
C.UPDATE 
D.DELETE

单项选择题Toallocateanotherroletoauser,whichcommandismostappropriate?（）

A.ALTER USER 
B.ALTER DATABASE 
C.ALTER SYSTEM 
D.GRANT

单项选择题Youareattemptingtoclearanunarchivedredologfile.Inordertomanuallyenactalogswitch,whichofthefollowingstatementsisappropriate?（）

A.ALTER DATABASE 
B.ALTER SYSTEM 
C.ALTER USER 
D.ALTER REDO LOG

单项选择题YouareanalyzingthecomponentsoftheredologmechanismsinyourOracledatabase.WhichofthefollowingpurposesdoestheCKPTprocessserve?（）

A.Writes buffers to disk 
B.Writes current redo log number to datafile headers 
C.Writes redo log information to disk 
D.Reads information into memory for users