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？（）

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？（）

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？（）

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？（）

You have only two redo log groups and these groups get overwritten several times in a day. Your database operates in NOARCHIVELOG mode and user­managed consistent backups are performed every Sunday night. On Thursday morning， you find that an important table has been dropped and purged. 
With reference to this scenario， up to what point in time can the data be recovered？（）

Your database operates in ARCHIVELOG mode. User­managed consistent backups are performed every Sunday night. 
On Tuesday， client A drops a table at 8：00 a.m. as follows： 
SQL> DROP TABLE cust_ord PURGE; 
Table dropped. 
Client B executes a query at 9：00 a.m. on the same table as follows： 
SQL> SELECT * FROM cust_ord;
SELECT * FROM cust_ord
* 
ERROR at line 1： 
ORA­00942： table or view does not exist 
Client B needs the dropped table and reports the problem to you. With reference to this scenario， which action should you take？（）

You are connected to Recovery Manager （RMAN） without a recovery catalog. There is no copy of the control file available. You want to restore the control file from an autobackup. To retrieve the autobackup，you need the database ID （DBID）. 
In which two sources would you find the DBID？ （）