A.A
B.B
C.C
D.D
E.E

A.CHANGE
B.RESYNC
C.CATALOG
D.CROSSCHECK

A.service
B.listener
C.dispatcher
D.shared server process

A.Direct-path export is typically faster.
B.Direct-path export can be invoked interactively.
C.Direct-path export is character set independent.
D.Direct-path export bypasses the SQL-command processing layer.
E.Direct-path export can be used to export rows containing LOBs and BFILEs.

A.large pool
B.shared pool
C.data buffer cache
D.redo log buffer
E.data dictionary cache

A.RMAN keeps a list of archive logs in a text file.
B.The DBA must manually tell RMAN which archive logs to backup.
C.RMAN has access to target control file and/or catalog information.
D.RMAN looks at the ARCHIVE_LOG_DEST parameter of your target database and backs up all archive logs found.

A.To verify space requirements in the target database before importing.
B.To generate the SQL for the DDL operations that would occur during import.
C.To check character set compatibility between the export file and the target database.
D.To check for integrity constraint violations that would occur in the target database.

A.data files
B.backup sets
C.control files
D.archived redo log files

A.A database backup, combined with archived redo log files, guarantees that all committed data can be recovered to the point of failure. 
B.During recovery the ARCn background process copies its redo entries identified for recovery by the control file to the data files. 
C.After each write to an archived log, the mandatory background process ARCn writes its log sequence number and the first and last SCN number within the log sequence to the control file. 
D.At database recover time, and archived redo log is uniquely identified for recovery use by its redo thread number and destination ID number retrieved from the control file.

A.4，1，5，6，3，2
B.4，3，1，5，6，2
C.4，5，1，3，2，6
D.5，4，1，3，2，6
E.5，4，1，3，6，2