Which data dictionary views displays the error information related to a data file， when an internal read fails on that file？（）

单项选择题AfteranumberofdayssetbytheparameterCONTROL_FILE_RECORD_KEEP_TIME，theinformationinthecontrolfileisoverwrittenbyRMAN.Whatisthisparameter’sdefaultvalue？（）

A.1 day
B.5 days
C.7 days
D.31 days

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