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

题目

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？（）

  • A、RECOVER LOGFILE BLOCK GROUP 2；
  • B、ALTER DATABASE DROP LOGFILE GROUP 2；
  • C、ALTER DATABASE CLEAR LOGFILE GROUP 2；
  • D、ALTER DATABASE RECOVER LOGFILE GROUP 2；
  • E、ALTER DATABASE CLEAR UNARCHIVED LOGFILE GROUP 2；
相似考题

1.The database is running in the ARCHIVELOG mode. It has three redo log groups with one member each.One of the redo log groups has become corrupted. You have issued the following command during the recovery of a damaged redo log file:ALTER DATABASE CLEAR UNARCHIVED LOGFILE GROUP 3;Which action should you perform immediately after using this command?（）A. You should perform a log switchB. You should make a backup of the databaseC. You should switch the database to the NONARCHIVELOG modeD. You should shut down the database instance and perform a complete database recovery

2. The database is running in the ARCHIVELOG mode. It has three redo log groups with one member each. One of the redo log groups has become corrupted. You have issued the following command during the recovery of a damaged redo log file：   ALTER DATABASE CLEAR UNARCHIVED LOGFILE GROUP 3；   Which action should you perform immediately after using this command？（）  A、 You should perform a log switchB、 You should make a backup of the databaseC、 You should switch the database to the NONARCHIVELOG modeD、 You should shut down the database instance and perform a complete database recovery

3.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？（）A、 import the database from the last exportB、 restore all the members in the group from the last backupC、 drop the lost member from the database and then add a new member to the groupD、 restore all the database files from the backup and then perform a complete recoveryE、 restore all the database files from the backup and then perform an incomplete recovery

4.Redo log files are multiplexed in your database. The disk in which you have one of the redo log members is highly fragmented. In the process of defragmentation you lose the redo log member， which is not a member of the current group. How would you recover from the loss of the redo log member？（）A、SMON would automatically restore the lost file.B、You would need to restore the whole database from the last backup.C、You would need to restore the file from the last full database backup.D、You would need to use flashback technology to restore the lost redo log member.E、You would need to use Recovery Manager （RMAN） to restore the lost redo log member.F、You would need to restore the missing log file by copying one of the remaining files from the same group.

参考答案和解析
正确答案:E
更多“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”相关问题

  • 第1题：

    You are using Oracle Database 10g. You performed an  incomplete recovery of your database and opened the database with the RESETLOGS option.  What is the effect of opening the database with the RESETLOGS option？（）

    • A、This operation resets the SCN for the database.
    • B、This operation creates a new incarnation of the database.
    • C、This operation moves all the redo log files to a different location.
    • D、This operation deletes the old redo log files and creates new redo log files.
    • E、This operation updates all current datafiles and online redo logs and all subsequent archived redo logs with a new RESETLOGS SCN and time stamp.

    正确答案:B,E

  • 第2题：

    A media failure has occurred. This has resulted in all the members of the next hop log group being rendered inaccessible to the log writer process （LGWR） at a log switch. How does this failure affect the operational database？（）

    • A、 The database re-created the missing redo log files automatically.
    • B、 The database continues to function normally with the existing files.
    • C、 The database allows only queries， no other statements are allowed.
    • D、 The database returns and error and the database instance shuts down.
    • E、 The user sessions that generate redo logs are terminated automatically.

    正确答案:D

  • 第3题：

    You work as a database administrator for Certkiller .com. Users in the Certkiller PROD database complain about the slow response when accessing the database. In the Active Session Waiting： Configuration page you find that the majority of the wait time is for the redo log buffer.Further investigation using the Run Queue graph and operating system tools reveals that the redo log files are on the same disks， and that the disk I/O for the redo log files is the reason for the performance degradation.  Which two actions would you take to gain performance？（）

    • A、Increase the size of redo log files
    • B、Increase the size of redo log buffer
    • C、Increase the number of redo log files
    • D、Place the redo log files on a separate disk
    • E、Decrease the number of redo log groups to two
    • F、Increate the number Log Writer （LGWR） process

    正确答案:B,D

  • 第4题：

    In your production database， you have observed that the database server performance degrades whenever there is a switch between the log groups. On further investigation， you find that the database is running in ARCHIVELOG mode and the archived log files are being written to the same disk that is used to store the redo log members.  Which two actions would you take to improve the performance of the database server？ （）

    • A、increase the size of the redo log buffer
    • B、increase the number of redo log groups
    • C、increase the number of log writer processes
    • D、increase the number of ARCn processes
    • E、change the appropriate LOG_ARCHIVE_DEST_n parameter to place the archived log files in a separate location

    正确答案:B,E

  • 第5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.

    • A、b， a， f
    • B、e， b， a， f
    • C、e， b， a， g
    • D、b， a， g
    • E、c， e， b， d， f

    正确答案:E

  • 第6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

    正确答案:D

  • 第7题：

    单选题
    A media failure has occurred. This has resulted in all the members of the next log group being rendered inaccessible to the log writer process （LGWR） at a log switch. How does this failure affect the operational database？（）
    A

     The database allows only queries； no other statements are allowed.

    B

     The database re-creates the missing redo log files automatically.

    C

     The database continues to function normally with the existing files.

    D

     The database returns an error and the database instance shuts down.

    E

     The user sessions that generate redo logs are terminated automatically.


    正确答案： D
    解析： 暂无解析

  • 第8题：

    单选题
    Redo log files are multiplexed in your database. The disk in which you have one of the redo log members is highly fragmented. In the process of defragmentation you lose the redo log member， which is not a member of the current group. How would you recover from the loss of the redo log member？（）
    A

    SMON would automatically restore the lost file.

    B

    You would need to restore the whole database from the last backup.

    C

    You would need to restore the file from the last full database backup.

    D

    You would need to use flashback technology to restore the lost redo log member.

    E

    You would need to use Recovery Manager （RMAN） to restore the lost redo log member.

    F

    You would need to restore the missing log file by copying one of the remaining files from the same group.


    正确答案： B
    解析： 暂无解析

  • 第9题：

    单选题
    The database is running in the ARCHIVELOG mode. It has three redo log groups with one member each. Oneof the redo log groups has become corrupted. You have issued the following command during the recovery of a damaged redo log file:ALTER DATABASE CLEAR UNARCHIVED LOGFILE GROUP 3; Which action should you perform immediately after using this command?（）
    A

    You should perform a log switch

    B

    You should make a backup of the database

    C

    You should switch the database to the NONARCHIVELOG mode

    D

    You should shut down the database instance and perform a complete database recovery


    正确答案： C
    解析： 暂无解析

  • 第10题：

    单选题
    You configured the Flash Recovery Area for your database. The database instance has been startedin ARCHIVELOG mode and the LOG_ARCHIVE_DEST_1 parameter is not set.  What will be the implications on the archiving and the location of archive redo log files（）
    A

    Archiving will be disabled because the destination for the redo log files is missing.

    B

    The database instance will shut down and the error details will be logged in the alert log file.

    C

    Archiving will be enabled and the destination for the archived redo log file will be set to the FlashRecovery Area implicitly.

    D

    Archiving will be enabled and the location for the archive redo log file will be created in the defaultlocation $ORACLE_HOME/log.


    正确答案： A
    解析： 暂无解析

  • 第11题：

    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 missing

    B

     when all the online redo log groups are not multiplexed and one log group is missing

    C

     when all the control files are missing

    D

     when some important tables are deleted from the database and purged from the Recycle Bin


    正确答案： A
    解析： 暂无解析

  • 第12题：

    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？（）
    A

     import the database from the last export

    B

     restore all the members in the group from the last backup

    C

     drop the lost member from the database and then add a new member to the group

    D

     restore all the database files from the backup and then perform a complete recovery

    E

     restore all the database files from the backup and then perform an incomplete recovery


    正确答案： A
    解析： 暂无解析

  • 第13题：

    Which two statements are true regarding the database in ARCHIVELOG mode？（）

    • A、You have to shut down the database to perform the backups.
    • B、Archiving information is written to the data files and redo log files.
    • C、You can perform complete database backups without closing the database.
    • D、Online redo log files have to be multiplexed before putting the database in ARCHIVELOG mode.
    • E、All the previous database backups become invalid after you configure the database to ARCHIVELOG mode.

    正确答案:C,E

  • 第14题：

    You configured the Flash Recovery Area for your database. The database instance has been started inARCHIVELOG mode and the LOG_ARCHIVE_DEST_1 parameter is not set. What will be the implications onthe archiving and the location of archive redo log files（）

    • A、Archiving will be disabled because the destination for the redo log files is missing.
    • B、The database instance will shut down and the error details will be logged in the alert log file.
    • C、Archiving will be enabled and the destination for the archived redo log file will be set to the Flash RecoveryArea implicitly.
    • D、Archiving will be enabled and the location for the archive redo log file will be created in the default location$ORACLE_HOME/log.

    正确答案:C

  • 第15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 group
    • B、 perform redo log file import
    • C、 perform an incomplete recovery
    • D、 perform a redo log recovery using Recovery Manager （RMAN）
    • E、 shut down the database and open the database in the NOARCHIVELOG mode

    正确答案:A

  • 第16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.

    正确答案:A

  • 第17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 missing
    • B、 when all the online redo log groups are not multiplexed and one log group is missing
    • C、 when all the control files are missing
    • D、 when some important tables are deleted from the database and purged from the Recycle Bin

    正确答案:A

  • 第18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、 SQL>ALTER DATABASE DROP LOGFILE GROUP 1；
    • B、 SQL>ALTER DATABASE CLEAR LOGFILE GROUP 1；
    • C、 SQL>ALTER DATABASE CLEAR UNARCHIVED LOGFILE GROUP 1；
    • D、 SQL>ALTER DATABASE DROP LOGFILE MEMBER ’D:///REDO01.LOG’；

    正确答案:C

  • 第19题：

    多选题
    In your production database， you have observed that the database server performance degrades whenever there is a switch between the log groups. On further investigation， you find that the database is running in ARCHIVELOG mode and the archived log files are being written to the same disk that is used to store the redo log members.  Which two actions would you take to improve the performance of the database server？ （）
    A

    increase the size of the redo log buffer

    B

    increase the number of redo log groups

    C

    increase the number of log writer processes

    D

    increase the number of ARCn processes

    E

    change the appropriate LOG_ARCHIVE_DEST_n parameter to place the archived log files in a separate location


    正确答案： B,E
    解析： 暂无解析

  • 第20题：

    单选题
    The performance of your database is affected by the presence of two log members in each online redo log group and the placement of redo log members of a group on the same disk. You decide to place the redo log members of a group on separate disks. Which view will you query to find the name and location of all the online redo log members？（）
    A

     V$LOG

    B

     V$LOGFILE

    C

     DBA_LOG_GROUPS

    D

     V$LOG_HISTORY


    正确答案： A
    解析： 暂无解析

  • 第21题：

    多选题
    You are using Oracle Database 10g. You performed an incomplete recovery of your database and opened the database with the RESETLOGS option.  What is the effect of opening the database with the RESETLOGS option？ （）
    A

    This operation resets the SCN for the database.

    B

    This operation creates a new incarnation of the database.

    C

    This operation moves all the redo log files to a different location.

    D

    This operation deletes the old redo log files and creates new redo log files.

    E

    This operation updates all current datafiles and online redo logs and all subsequent archived redo logs with a new RESETLOGS SCN and time stamp.


    正确答案： C,D
    解析： 暂无解析

  • 第22题：

    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.


    正确答案： C
    解析： 暂无解析

  • 第23题：

    单选题
    You work as a database administrator for Certkiller .com. 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？（）
    A

    RECOVER LOFIEL BLOCK GROUP 2；

    B

    ALTER DATABASE DROP LOGFILE GROUP 2；

    C

    ALTER DATABASE CLEAR LOGFILE GROUP 2；

    D

    ALTER DATABASE RECOVER LOGFILE GROUP 2；

    E

    ALTER DATABASE CLEAR UNARCHIVED LOGFILE GROUP 2；


    正确答案： D
    解析： 暂无解析

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