单项选择题
The datafiles of your database are ASM files. You are performing a check for datafile block corruption by using the DBVERIFY utility.
What is a prerequisite for checking block corruption on an ASM datafile by using the DBVERIFY utility？（）
A. The block change tracking feature must be enabled.
B. OMF must be configured on your database.
C. The database must be in ARCHIVELOG mode.
D. A USERID must be supplied.
相关考题
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单项选择题
YouaremaintainingthePRODdatabaseofTeleSoftCorporation.YouhaveinitializedthefollowingDB_BLOCK_CHECKINGparameterintheinit.orafile：DB_BLOCK_CHECKING=TRUE；Whatwillbetheresultofsettingthisparameter？（）
A. Only data blocks of the SYSTEM tablespace will be checked.
B. Only data blocks of the SYSAUX tablespace will be checked.
C. A checksum will occur only on the checkpoint.
D. A checksum will occur every time a block is modified. -
单项选择题
YouareusingtheBlockMediaRecoveryfeaturetorecovertheblocksthataremarkedcorruptsincethelastbackup.Whichviewwillyouquerytodisplayinformationaboutthedatablocksthataremarkedcorruptsincethelastbackup？（）
A. V$BACKUP_CORRUPTION
B. V$COPY_CORRUPTION
C. V$DATABASE_BLOCK_CORRUPTION
D. RC_BACKUP_CORRUPTION -
单项选择题
YouaremaintainingyourOLTPdatabaseinOracle10g.YouareperformingtheFlashbackTransactionQuerytofindtheundoSQLstatementsthatcanbeusedtoundothechangesmadetothedatabaseinthespecifictimeperiod.WhichpseudocolumnwillyouusetoperformtheFlashbackTransactionQuery？（）
A. VERSIONS_STARTSCN
B. VERSIONS_STARTTIME
C. VERSIONS_XID
D. VERSIONS_OPERATION
