单选题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？（）A The database will hang.B The database will be crashed.C The database will be shut down.D The LGWR process writes redo log entries to the other redo log member of the Group2 group
单选题
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？（）
A
The database will hang.
B
The database will be crashed.
C
The database will be shut down.
D
The LGWR process writes redo log entries to the other redo log member of the Group2 group
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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
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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？（）A、 The instance starts， the database is mounted， but efforts to open the database fail， and an error about the missing redo log group is displayed.B、 Before the instance starts， you receive an error about the missing redo log files of a group.C、 The instance starts and the database opens with an error message written to the alert log file.D、 The instance starts and the database opens because two redo log groups still exist.E、 The instance starts and the database opens， but every attempt to write to redo log files fails with an error.
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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？（） A、 The database will hang.B、 The database will be crashed.C、 The database will be shut down.D、 The LGWR process writes redo log entries to the other redo log member of the Group2 group
Your database is in ARCHIVELOG mode. You have two online redo log groups each of which contains one redo 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 1 ORA-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、 SQLALTER DATABASE DROP LOGFILE GROUP 1；B、 SQLALTER DATABASE CLEAR LOGFILE GROUP 1；C、 SQLALTER DATABASE CLEAR UNARCHIVED LOGFILE GROUP 1；D、 SQLALTER DATABASE DROP LOGFILE MEMBER ’D:///REDO01.LOG’；
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单选题Your database is in NOARCHIVELOG mode. The database has three online redo log groups， and each group contains three online redo log members. The online redo log members are stored across three hard disks， E， F， and G， respectively. Hard disk G crashed while the LGWR background process was writing redo information to the online redo log files. What effect will this crash have on the database？（）A The database will operate normally without generating any redo.B The database will hang， and you must shut down and restart the instance.C The database will crash， and you must recover the database from the point of failure.D The database will operate normally and will generate minimal redo for the tables created with the NOLOGGING clause.
单选题Your database is in ARCHIVELOG mode. You have two online redo log groups, each of which contains one redo 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 1 ORA-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?（）AALTER DATABASE DROP LOGFILE GROUP 1;BALTER DATABASE CLEAR LOGFILE GROUP 1;CALTER DATABASE CLEAR UNARCHIVED LOGFILE GROUP 1;DALTER DATABASE DROP LOGFILE MEMBER 'D:/REDO01.LOG
单选题In your database， online redo log files are multiplexed and one of the members in a group is lost due to media failure. How would you recover the lost redo log member？（）Aimport the database from the last exportBrestore all the members in the group from the last backupCdrop the lost member from the database， and then add a new member to the groupDrestore all the database files from the backup， and then perform a complete recovery Erestore all the database files from the backup， and then perform an incomplete recovery
单选题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？（）A The instance starts， the database is mounted， but efforts to open the database fail， and an error about the missing redo log group is displayed.B Before the instance starts， you receive an error about the missing redo log files of a group.C The instance starts and the database opens with an error message written to the alert log file.D The instance starts and the database opens because two redo log groups still exist.E The instance starts and the database opens， but every attempt to write to redo log files fails with an error.
单选题Your database is in ARCHIVELOG mode. You have two online redo log groups，each of which contains one redo member. When you attempt to start the database， you receive the following errors：（）A ALTER DATABASE DROP LOGFILE GROUP 1B ALTER DATABASE CLEAR LOGFILE GROUP 1C ALTER DATABASE CLEAR UNARCHIVED LOGFILE GROUP 1D ALTER DATABASE DROP LOGFILE MEMBER ’D:///REDO01.LOG’
单选题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？（）A clear the redo log groupB perform redo log file importC perform an incomplete recoveryD perform a redo log recovery using Recovery Manager （RMAN）E shut down the database and open the database in the NOARCHIVELOG mode
单选题If a log file becomes corrupted， it may cause the database to stall. How would you correct such a situation？（）A Recover the online redo log from backup.B Delete and re-create the log file.C Use the alter database clear logfile command to clear the log file.D Shut down the database and restart it.E Shut down the database and then mount it. Clear the log file with the alter database clear logfile command and then restart the database with alter database open resetlogs.
单选题Your database is in ARCHIVELOG mode. You have two online redo log groups each of which contains one redo 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 1 ORA-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 SQLALTER DATABASE DROP LOGFILE GROUP 1；B SQLALTER DATABASE CLEAR LOGFILE GROUP 1；C SQLALTER DATABASE CLEAR UNARCHIVED LOGFILE GROUP 1；D SQLALTER DATABASE DROP LOGFILE MEMBER ’D:///REDO01.LOG’；
单选题In which scenario is a Database Administrator NOT required to perform an incomplete recovery？（）A when all the online redo log groups are multiplexed and one of the members of a group is missingB when all the online redo log groups are not multiplexed and one log group is missingC when all the control files are missingD when some important tables are deleted from the database and purged from the Recycle Bin
单选题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？（）Athe value of the UNDO_RETENTION initialization parameterBthe value of the optimal redo log file size provided by the Redo Logfile Size AdvisorCthe online redo log files sizeDthe number of redo log members in a group
单选题Redo log files are not multiplexed in your database. Redo log blocks are corrupted in group 2， and archiving has stopped. All the redo logs are filled and database activity is halted. Database writer has written everything to disk. Which command would you execute to proceed further？（）ARECOVER LOGFILE BLOCK GROUP 2；BALTER DATABASE DROP LOGFILE GROUP 2；CALTER DATABASE CLEAR LOGFILE GROUP 2；DALTER DATABASE RECOVER LOGFILE GROUP 2；EALTER DATABASE CLEAR UNARCHIVED LOGFILE GROUP 2；
单选题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.Ab， a， fBe， b， a， fCe， b， a， gDb， a， gEc， e， b， d， f