多选题In your database， the Log Writer （LGWR）  process is unable to write to a member of a current redo log group due to read/write failure. Which two effects would you see in your database？（）AThe database instance aborts.BThe database operation temporarily 

题目
多选题
In your database， the Log Writer （LGWR）  process is unable to write to a member of a current redo log group due to read/write failure. Which two effects would you see in your database？（）
A

The database instance aborts.

B

The database operation temporarily halts till the member becomes available.

C

Writing proceeds as normal. LGWR writes to the available members of a group and ignores the unavailable members.

D

The member would be marked as STALE and an error message would be written to the alert log file and LGWR trace file.

E

The status of the group changes to INACTIVE and an error message would be written to the alert log file and LGWR trace file.

相似考题

1.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

2. 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、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

3.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.

4.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；

更多“多选题In your database， the Log Writer （LGWR）  process is unable to write to a member of a current redo log group due to read/write failure. Which two effects would you see in your database？（）AThe database instance aborts.BThe database operation temporarily ”相关问题

  • 第1题：

    You are working on the PROD database， which is in NOARCHIVELOG mode. You lost the active online redo log group due to a media failure. How should you recover your database？（）

    • A、 Restore the database from a whole consistent backup and start the database in MOUNT mode. Then， open the database with the RESETLOGS option after performing a cancel-based recovery.
    • B、 Restore the database from a whole consistent backup and start the database in MOUNT mode. Then， drop the lost redo log group and open the database with the RESETLOGS option after performing a cancel-based recovery.
    • C、 Restore the database from a whole consistent backup and start the database in MOUNT mode. Then， clear the lost redo log group and open the database with the RESETLOGS option after performing a cancel-based recovery.
    • D、 Do nothing. You do not need to recover the database in this case； an instance recovery will be performed by the SMON process on startup.

    正确答案:A

  • 第2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:C

  • 第3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 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’

    正确答案:C

  • 第4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5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:C

  • 第6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7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8题：

    单选题
    You work as a database administrator for Certkiller .com. Your database is functional. One of the disks containing a mirrored redo log member has bad sectors in it. You are unable to fix the damaged file.  How does the loss of a redo log member affect the instance of the database that is currently running？（）
    A

    The instance would normally abort.

    B

    The instance would not be affected.

    C

    The instance would be invalid， so would have to be aborted.

    D

    The instance would remain open， but the LGWR process would fail.

    E

    The instance would remain open and would automatically create the missing file


    正确答案： E
    解析： 暂无解析

  • 第9题：

    单选题
    You executed the following query in your database：  FROM V$FLASHBACK_DATABASE_LOG;  What would you determine from the output？（）
    A

    the time when the last flashback operation in your database was performed

    B

    the time when the first flashback operation in your database was performed

    C

    a list of flashback operations performed in your database using SCN and time

    D

    the approximate time and the lowest system change number （SCN） to which you can flash back your database


    正确答案： D
    解析： 暂无解析

  • 第10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11题：

    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

     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
    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：

    Your production database is running in the ARCHIVELOG mode and the ARCn process is functional. You have two online redo log groups. Which three background processes would be involved when a log switch happens？ （）

    • A、archival
    • B、log writer
    • C、database writer
    • D、system monitor
    • E、process monitor
    • F、change tracking writer

    正确答案:A,B,C

  • 第14题：

    You work as a database administrator for Supportcenter.cn. Your database is functional. One of the disks containing a mirrored redo log member has bad sectors in it. You are unable to fix the damaged file. How does the loss of a redo log member affect the instance of the database that is currently running？（）

    • A、The instance would normally abort.
    • B、The instance would not be affected.
    • C、The instance would be invalid， so would have to be aborted.
    • D、The instance would remain open， but the LGWR process would fail.
    • E、The instance would remain open and would automatically create the missing file

    正确答案:B

  • 第15题：

    In your database， the Log Writer （LGWR）  process is unable to write to a member of a current redo log group due to read/write failure. Which two effects would you see in your database？（）

    • A、The database instance aborts.
    • B、The database operation temporarily halts till the member becomes available.
    • C、Writing proceeds as normal. LGWR writes to the available members of a group and ignores the unavailable members.
    • D、The member would be marked as STALE and an error message would be written to the alert log file and LGWR trace file.
    • E、The status of the group changes to INACTIVE and an error message would be written to the alert log file and LGWR trace file.

    正确答案:C,D

  • 第16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.

    正确答案:D

  • 第17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18题：

    多选题
    You plan to execute the following command to perform a Flashback Database operation in your database：   SQL> FLASHBACK DATABASE TO TIMESTAMP （SYSDATE -5/24）；   Which two statements are true about this？（）
    A

    The database must have multiplexed redo log files

    B

    The database must be in the MOUNT state to execute the command

    C

    The database must be in the NOMOUNT state to execute the command

    D

    The database must be opened in RESTRICTED mode before this operation

    E

    The database must be opened with the RESETLOGS option after the flashback operation


    正确答案： B,A
    解析： 暂无解析

  • 第19题：

    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


    正确答案： A
    解析： 暂无解析

  • 第20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21题：

    多选题
    Your production database is running in the ARCHIVELOG mode and the ARCn process is functional. You have two online redo log groups. Which three background processes would be involved when a log switch happens？ （）
    A

    archival

    B

    log writer

    C

    database writer

    D

    system monitor

    E

    process monitor

    F

    change tracking writer


    正确答案： B,D
    解析： 暂无解析

  • 第22题：

    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 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’


    正确答案： B
    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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