OCP CBT Question 517

Please solve the following question.

You are attempting to start a production database instance after a server reboot. The database fails to open and you observe the following output in the alert log and SQL*Plus:

Alert Log SnippetORA-00312: online log 3 thread 1: '/u01/app/oracle/oradata/mydb/redo03.log'ORA-00310: archive log string lacks 'logfmt' (description)ORA-00312: online log 1 thread 1: '/u01/app/oracle/oradata/mydb/redo01.log'## SQL*Plus OutputSQL> STARTUPORA-00600: internal error code, arguments: [4194], [1], [72], [], [], [], [], []ORA-00330: archived log for thread 1 with SCN 100000 between sequence 1 and 1 is not foundORA-00312: online log 1 thread 1: '/u01/app/oracle/oradata/mydb/redo01.log'ORA-00312: online log 2 thread 1: '/u01/app/oracle/oradata/mydb/redo02.log'ORA-00312: online log 3 thread 1: '/u01/app/oracle/oradata/mydb/redo03.log'

The control file is corrupted and needs to be restored.

One or more online redo log members are missing or corrupted.

An archived redo log file required for crash recovery is missing.

The database block size parameter (DB_BLOCK_SIZE) is inconsistent with the data files.