clear the redo log group
perform redo log file import
perform an incomplete recovery
perform a redo log recovery using Recovery Manager (RMAN)
shut down the database and open the database in the NOARCHIVELOG mode
第1题:
If a log file becomes corrupted, it may cause the database to stall. How would you correct such a situation?()
第2题:
You are maintaining your OLTP database in Oracle10g. While observing the performance of the database, you find that the log switch occurs more than once for every 20 minutes, affecting the database performance. Which factor is responsible for frequent log switches?()
第3题:
You are using recovery Manager (RMAN) with a recovery catalog to backup up your production database. The backups and the archived redo log files are copied to a tape drive on a daily basis. The database was open and transactions were recorded in the redo logs. Because of fire in the building you lost your servers having the production database and the recovery catalog database.The archive log files generated after the last backup are intact on one of the remote locations. While performing a disaster recovery of the production database what is the next step that you must perform after restoring the data files and applying archived redo logs?()
A. Open the database in NORMAL mode
B. Open the database in read-only mode
C. Open the database in RESTRICTED mode
D. Open the database with the RESETLOGS option
第4题:
Which statement about recovering from the loss of a redo log group is true?()
第5题:
You are working on a database, where you have three redo log groups. When the database is down for a backup, an operating system (OS) user deletes all the redo log files in a group. What will happen when you open your database?()
第6题:
After performing a clean shut down of the database instance for maintenance, you mount the database andthen execute a command to open the database:SQL> ALTER DATABASE OPEN; Which two statements are true()
第7题:
A redo log file is corrupted while the database is open; as a consequence, database operations are stopped because archiving cannot continue. What would you do to solve the problem?()
第8题:
Your database is in ARCHIVELOG mode. You have two online redo log groups, each of which contains oneredo member. When you attempt to start the database, you receive the following errors:ORA-00313: open failed for members of log group 1 of thread 1ORA-00312: online log 1 thread 1: ‘D:\REDO01.LOG‘You discover that the online redo log file of the current redo group is corrupted.Which statement should you use to resolve this issue?()
A. ALTER DATABASE DROP LOGFILE GROUP 1;
B. ALTER DATABASE CLEAR LOGFILE GROUP 1;
C. ALTER DATABASE CLEAR UNARCHIVED LOGFILE GROUP 1;
D. ALTER DATABASE DROP LOGFILE MEMBER ‘D:\REDO01.LOG
第9题:
You have lost all your online redo logs. As a result, your database has crashed. You have tried to restart the database and clear the online redo log files, but when you try to open the database you get the following error. SQL> startup ORACLE instance started. Total System Global Area 167395328 bytes Fixed Size 1298612 bytes Variable Size 142610252 bytes Database Buffers 20971520 bytes Redo Buffers 2514944 bytes Database mounted. ORA-00313: open failed for members of log group 2 of thread 1 ORA-00312: online log 2 thread 1: ,,/oracle01/oradata/orcl/redo02a.log ORA-27037: unable to obtain file status Linux Error: 2: No such file or directory Additional information: 3 ORA-00312: online log 2 thread 1: ,,/oracle01/oradata/orcl/redo02.log ORA-27037: unable to obtain file status Linux Error: 2: No such file or directory Additional information: 3 SQL> alter database clear logfile group 2; alter database clear logfile group 2 * ERROR at line 1: ORA-01624: log 2 needed for crash recovery of instance orcl (thread 1) ORA-00312: online log 2 thread 1: ,,/oracle01/oradata/orcl/redo02.log ORA-00312: online log 2 thread 1: ,,/oracle01/oradata/orcl/redo02a.log What steps must you take to resolve the error?() a. Issue the recover database redo logs command. b. Issue the Startup Mount command to mount the database. c. Restore the last full database backup. d. Perform a point-in-time recovery, applying all archived redo logs that are available. e. Restore all archived redo logs generated during and after the last full database backup. f. Open the database using the alter database open resetlogs command. g. Issue the alter database open command.
第10题:
The online redo log group configuration for your database is as follows: What will happen if the online redo log file ’ora02/oradata/redo02b.log’is corrupted while working on the database?()