多项选择题
A.Recover from failures in the RAC environment.
B.Diagnose and repair a data file corruption online.
C.Diagnose and repair a data file corruption offline.
D.Diagnose and repair failures on a standby database
多项选择题 Which operationsrequireundodata（）
单项选择题 You configured the Flash Recovery Area for your database. The database instance has been started inARCHIVELOG mode and the LOG_ARCHIVE_DEST_1 parameter is not set. What will be the implications onthe archiving and the location of archive redo log files（）
多项选择题 WhichtwostatementsaretrueaboutSharedSQLAreaandPrivateSQLAreas（）