11. You work as a database administrator at Certkiller .com. Your dat
abase is open and running in ARCHIVELOG mode. You take RMAN full bac
kups every Sunday night. On Monday morning, while querying the user1.
employees table, you receive the following error message:
01578: ORACLE data block corrupted (file # 5, block # 51)
ORA-01110: data file 5: '/u01/app/oracle/oradata/orcl/example01.dbf'
You need to rectify the corruption while ensuring the following:
The data file should remain online. The mean time to recover (MTTR) s
hould be minimal. You are not using a backup control file and all the
archived logs are accessible. Which option would you choose?
A. flash back the corrupted blocks
B. use the DBMS_REPAIR package
C. use the RMAN TSPITR command
D. use the RMAN BLOCKRECOVER command
E. use the RESTORE DATABASE and RECOVER DATABASE commands
F. investigate the time at which the corruption occurred and perf
orm a point-in-time recovery
坏，要求MTTR 时间最少，要求data file 在线，所以最好的方法就是RMAN
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