After a number of days set by the parameter CONTROL_FILE_RECORD_KEEP_TIME， the information in the control file is overwritten by RMAN. What is this parameter’s default value？（）

单项选择题WhichofthefollowingstepsisincorrectinthefollowingsequenceofenablingtheARCHIVELOGmodeofadatabase？（）

A.Shut down the database.
B.Set the appropriate parameters in init.ora file.
C.Start the database in NOMOUNT state.
D.Issue the ALTER DATABASE ARCHIVELOG command.
E.Open the database.
F.Take a full closed backup.

单项选择题WhatisthemaximumdatabaseblocksizesupportedfortheOracle9idatabase？（）

A.16KB
B.32KB
C.64KB
D.128KB

单项选择题AsADBA，whichofthefollowingmethodscanyouusetomakeabackupofyourtable？（）

A.Recover Manager （RMAN） utility
B.Import utility
C.Export utility
D.O/S backup command

单项选择题Whichofthefollowingparametersmustbespecifiedtodefinethenumberofdispatchersthatneedtobestarted？（）

A.MAX_DISPATCHERS
B.DISPATCHERS
C.MIN_DISPATCHERS
D.SHARED_SERVERS

单项选择题WhichoneofthefollowingfilesincludestheparameterNAMES.DIRECTORY_PATH（hostname）？（）

A.Listener.ora
B.Tnsnames.ora
C.Cman.ora
D.Sqlnet.ora