A.open the database with the RESETLOGS optionB.open the……

单项选择题Your database operates in ARCHIVELOG mode. The redo log files are not multiplexed and one of the online redo logs is missing. The missing redo log sequence， 230， is not archived， and it contained information from 10：35 a.m. onwards.  The current time is 11：00 a.m. Because of a disk crash， you executed the following command to perform an incomplete recovery：  RMAN> RUN {  2> SET UNTIL SEQUENCE 230 THREAD 1  3> ALTER DATABASE MOUNT  4> RESTORE DATABASE  5> RECOVER DATABASE  6> ALTER DATABASE OPEN RESETLOGS 7> }  With reference to this scenario， which statement is true？（）

A.RMAN recovers up to log sequence 230， but not including 230.
B.RMAN returns an error because the log sequence number mentioned in the command should be 229.
C.RMAN returns an error because the log sequence number mentioned in the command may never be missing.
D.RMAN recovers up to and including log sequence 229 but then returns an error because log sequence 230 is missing.

多项选择题Foranincompleterecovery，whichfourbackuptypescanbeusedbyRecoveryManager（RMAN）torestoredatafiles？（）

A.RMAN image copies
B.RMAN database backups
C.RMAN tablespace backups
D.user­managed backups placed in the flash recovery area
E.user­managed backups that have been cataloged with RMAN
F.user­managed data file backups for which the full path name is specified

单项选择题Consider the recovery steps in each of the cases given below：  Case 1：  Shut down the database and perform a backup.  Restore all the data files.  Mount the database.  Recover the database.  Without applying all the redo log files， open the database using the RESETLOGS option.  Back up the database.  Case 2：  Shut down the database and perform a backup.  Restore only the data files of the tablespace where user error damaged the data.  Mount the database.  Recover the database.  Open the database with the RESETLOGS option.  Back up the database.  Case 3： Shut down the database  Restore the data files  Open the database  Perform recovery to the current point in time.  Which case has the correct steps for an incomplete recovery？（）

A.only case 1
B.only case 2
C.only case 3
D.case 1 and 2
E.case 2 and 3
F.case 1 and 3
G.all cases： case 1， case 2 and case 3

单项选择题You performed an incomplete recovery on your Oracle Database 10g database using the following command：  SQL> RECOVER DATABASE  2 UNTIL TIME ’2004­08­05：12：10：03’  3 USING BACKUP CONTROLFILE  In which situation would the above recovery be required？（）

A.A user table was lost at the specified time.
B.A redo log file was lost at the specified time.
C.The backup control file is on a faster disk than the current one.
D.The current control file has a different path compared with the intended time of recovery.
E.The current control file does not match the physical structure of the database at the intended time of recovery.

单项选择题The current time is 12：00 noon. You want to recover the USERS tablespace from a failure that occurred at 11：50 a.m. You discover that the only member of an unarchived redo log group containing information from 11：40 a.m. onwards is corrupt.  With reference to this scenario， if you are not using Recovery Manager （RMAN）， which recovery method would you use？（）

A.time­based recovery
B.log sequence recovery
C.cancel­based recovery
D.change­based recovery