单项选择题
By using the transaction identifier provided by（）for a particular row change， you can use the Flashback Transaction Query to see the operation performed by the transaction.
A. Flashback Table
B. Flashback Database
C. Flashback Version Query
D. The RMAN REPORT command
E. The DBA_PENDING_TRANSACTIONS view
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单项选择题
WhateffectshouldthelossofanindextablespacehaveonanOracleinstancethatisrunning？（）
A. instance hangs
B. instance gets aborted
C. instance continues running
D. instance gets restarted automatically -
单项选择题
Why would you use the following FLASHBACK TABLE command？（） FLASHBACK TABLE emp TO TIMESTAMP （’11：45’.’hh12：mi’）；
A. to undo the changes made to the EMP table since the specified time
B. to restore the EMP table that was wrongly dropped from the database
C. to view the transactions that have modified the EMP table since the specified time
D. to view the changes made to the EMP table for one or more rows since the specified time -
多项选择题
Intheparameterfileofyourproductiondatabase，theFAST_START_MTTR_TARGETparameterissetto300tooptimizeinstancerecovery.Whileobservingtheperformanceofthedatabaseduringinstancerecovery，youfindthattheredologfilesarenotsizedproperlytosupportthisactivity.Whichtwosourcescouldyouusetodeterminetheoptimalsizeoftheredologfiles？（）
A. the V$LOG view
B. the V$DBFILE view
C. the V$LOGFILE view
D. the V$INSTANCE_RECOVERY view
E. Oracle Enterprise Manager Database Control
