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单选题Which statement about recovering from the loss of a redo log group is true?（）A If the lost redo log group is ACTIVE, you should first attempt to clear the log file.B If the lost redo log group is CURRENT, you must clear the log file.C If the lost redo

题目
单选题
Which statement about recovering from the loss of a redo log group is true?（）
A

If the lost redo log group is ACTIVE, you should first attempt to clear the log file.

B

If the lost redo log group is CURRENT, you must clear the log file.

C

If the lost redo log group is ACTIVE, you must restore, perform cancel-based incomplete recovery, and open the database using the RESETLOGS option.

D

If the lost redo log group is CURRENT, you must restore, perform cancel-based incomplete recovery, and open the database using the RESETLOGS option.

相似考题

1.The Oracle Database 11g database is running in the ARCHIVELOG mode. The archived redo log files are stored on three locations. The Flash Recovery Area is one of the locations. The details are given below:Which statement is true regarding what this command accomplishes?（）A. All archived redo log files backed up at least twice to tape are deleted.B. All archived redo log files backed up at least once to tape are eligible for deletion.C. All archived redo log files backed up at least twice to tape are deleted from the flash recovery area.D. All archived redo log files in local archiving destinations and the flash recovery area backed up at least twice to tape are eligible for deletion.

2.Which statement is true regarding the Archiver （ARCn） process，archived log files，and recovery？ （）A、A database backup, combined with archived redo log files, guarantees that all committed data can be recovered to the point of failure. B、During recovery the ARCn background process copies its redo entries identified for recovery by the control file to the data files. C、After each write to an archived log, the mandatory background process ARCn writes its log sequence number and the first and last SCN number within the log sequence to the control file. D、At database recover time, and archived redo log is uniquely identified for recovery use by its redo thread number and destination ID number retrieved from the control file.

3. You are working on Oracle Database 10g， which is in ARCHIVELOG mode. All the archived log files are intact.  In which scenario would performing a recovery require the opening of the database with the RESETLOGS option？（）A、loss of a tempfileB、loss of a system data fileC、loss of one of the control filesD、loss of one of the tablespacesE、loss of a member from each redo log groupF、loss of the only member of an unarchived redo log group

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.

更多“Which statement about recovering from the loss of a redo log”相关问题

  • 第1题：

    You have recovered your Oracle Database 10g by using the control file backup because all copies of the current control file have been lost due to a media failure. You open your database by using the following statement：       SQL>ALTER DATABASE OPEN RESETLOGS；   Which of the following options is true about using the RESETLOGS option？（）

    • A、 The log sequence is reset to 0.
    • B、 All the online redo logs are deleted.
    • C、 All the archived redo logs from a previous incarnation become useless.
    • D、 The full database backup taken from a previous incarnation can be used in future.
    • E、 Only the control file and online redo log files are updated with a new RESETLOGS SCN and time stamp.

    正确答案:D

  • 第2题：

    You performed an incomplete recovery and opened the database with the RESETLOGS option. The LOG_ARCHIVE_FORMAT parameter is set to ’ora_%t_%s_%r.log’.  Which statement regarding the archived redo log files， created in an earlier incarnation of the database，is true？（）

    • A、 The archived redo log files will be overwritten.
    • B、 The archived redo log files are deleted automatically.
    • C、 The archived redo log files should be moved to some other location.
    • D、 The archived redo log files are still maintained because the file names are unique.

    正确答案:D

  • 第3题：

    The loss of which two types of files may require a recovery with the RESETLOGS option？（）

    • A、 control files
    • B、 password file
    • C、 archived log files
    • D、 system-critical data files for which all the redo entries are present
    • E、 non-system-critical data files for which all the redo entries are present

    正确答案:A,C

  • 第4题：

    Your database is having two control files， three redo log file groups with two members in each group. Failure of which file would cause an instance to shut down？（）

    • A、any control file
    • B、any archive log file
    • C、one of the redo log members
    • D、loss of the initialization parameter file
    • E、any data file belonging to the default permanent tablespac

    正确答案:A

  • 第5题：

    Which statement about recovering from the loss of a redo log group is true?（）

    • A、If the lost redo log group is ACTIVE, you should first attempt to clear the log file.
    • B、If the lost redo log group is CURRENT, you must clear the log file.
    • C、If the lost redo log group is ACTIVE, you must restore, perform cancel-based incomplete recovery, and open the database using the RESETLOGS option.
    • D、If the lost redo log group is CURRENT, you must restore, perform cancel-based incomplete recovery, and open the database using the RESETLOGS option.

    正确答案:D

  • 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：

    单选题
    You performed an incomplete recovery and opened the database with the RESETLOGS option. The LOG_ARCHIVE_FORMAT parameter is set to ’ora_%t_%s_%r.log’.  Which statement regarding the archived redo log files， created in an earlier incarnation of the database，is true？（）
    A

     The archived redo log files will be overwritten.

    B

     The archived redo log files are deleted automatically.

    C

     The archived redo log files should be moved to some other location.

    D

     The archived redo log files are still maintained because the file names are unique.


    正确答案： D
    解析： 暂无解析

  • 第8题：

    多选题
    You work as a database administrator for Supportcenter.cn. Users in the SupportCenter 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： F,D
    解析： 暂无解析

  • 第9题：

    多选题
    The loss of which two types of files may require a recovery with the RESETLOGS option？（）
    A

    control files

    B

    password file

    C

    archived log files

    D

    system-critical data files for which all the redo entries are present

    E

    non-system-critical data files for which all the redo entries are present


    正确答案： B,C
    解析： 暂无解析

  • 第10题：

    单选题
    You have recovered your Oracle Database 10g by using the control file backup because all copies of the current control file have been lost due to a media failure. You open your database by using the following statement：       SQL>ALTER DATABASE OPEN RESETLOGS；   Which of the following options is true about using the RESETLOGS option？（）
    A

     The log sequence is reset to 0.

    B

     All the online redo logs are deleted.

    C

     All the archived redo logs from a previous incarnation become useless.

    D

     The full database backup taken from a previous incarnation can be used in future.

    E

     Only the control file and online redo log files are updated with a new RESETLOGS SCN and time stamp.


    正确答案： C
    解析： 暂无解析

  • 第11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： C
    解析： 暂无解析

  • 第12题：

    单选题
    You are working on Oracle Database 10g， which is in ARCHIVELOG mode. All the archived log files are intact. In which scenario would performing a recovery require the opening of the database with the RESETLOGS option？（）
    A

     loss of one of the tablespaces

    B

     loss of a system data file

    C

     loss of one of the control files

    D

     loss of a tempfile

    E

     loss of the only member of an unarchived redo log group

    F

     loss of a member from each redo log group


    正确答案： E
    解析： 暂无解析

  • 第13题：

    Which two operations require undo data？（）

    • A、committing a transaction
    • B、rolling back a transaction
    • C、recovering from failed transactions
    • D、recording a transaction to redo log files
    • E、rolling forward during instance recovery

    正确答案:B,C

  • 第14题：

    Because of hardware failure， you decided to drop a redo log member from the database. Which condition should be met to drop a redo log file？（）

    • A、 The redo log file should belong to an active group.
    • B、 The redo log file should belong to an inactive group.
    • C、 The redo log file should belong to the current group.
    • D、 The redo log file can be dropped only if all the transactions are stopped.
    • E、 Before a redo log file is dropped， it should be deleted from the operating system （OS）.

    正确答案:B

  • 第15题：

    In which of the following scenarios is a tablespace recovery required？（）

    • A、 when recovering a lost read-only tablespace from a read-only tablespace backup
    • B、 when recovering a lost read-only tablespace from a read-write tablespace backup when the database is running in  ARCHIVELOG mode
    • C、 when recovering a lost read-only tablespace from a read-write tablespace backup when the database is running in  NOARCHIVELOG mode and the changes in the online redo log files have been overwritten
    • D、 when recovering a lost read-only tablespace from a read-only tablespace backup using the backup of the control file， the control file was created using the ALTER DATABASE BACKUP CONTROLFILE TO TRACE statement， and this statement was issued when the tablespace was read-only

    正确答案:B

  • 第16题：

    Which statement is true about FLUSH LOGS command?（）

    • A、It requires the RELOAD, FILE, and DROP privileges
    • B、It closes and reopens all log files
    • C、It closes and sends binary log files to slave servers
    • D、It flushes dirty pages in the buffer pool to the REDO logs

    正确答案:B

  • 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：

    单选题
    Your boss at Certkiller .com wants you to clarify Oracle 10g. Which statement regarding the usage of redo log files during instance recovery is true？（）
    A

    Transactions are rolled back using redo log files.

    B

    Transactions are rolled forward using redo log files.

    C

    Transactions are rolled back using redo log files and archived log files.

    D

    Transactions are rolled forward using redo log files and rolled back using redo log files.


    正确答案： A
    解析： 暂无解析

  • 第19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： D
    解析： 暂无解析

  • 第20题：

    单选题
    Because of hardware failure， you decided to drop a redo log member from the database. Which condition should be met to drop a redo log file？（）
    A

     The redo log file should belong to an active group.

    B

     The redo log file should belong to an inactive group.

    C

     The redo log file should belong to the current group.

    D

     The redo log file can be dropped only if all the transactions are stopped.

    E

     Before a redo log file is dropped， it should be deleted from the operating system （OS）.


    正确答案： A
    解析： 暂无解析

  • 第21题：

    单选题
    Which statement is true about FLUSH LOGS command?（）
    A

    It requires the RELOAD, FILE, and DROP privileges

    B

    It closes and reopens all log files

    C

    It closes and sends binary log files to slave servers

    D

    It flushes dirty pages in the buffer pool to the REDO logs


    正确答案： C
    解析： 暂无解析

  • 第22题：

    单选题
    The instance abnormally terminates because of a power outage.  Which statement is true about redo log filesduring instance recovery（）
    A

    Inactive and current redo log files are required to accomplish recovery.

    B

    Online and archived redo log files are required to accomplish instance recovery.

    C

    All redo log entries after the last checkpoint are applied from redo log files to data files.

    D

    All redo log entries recorded in the current redo log file until the checkpoint position are applied to data files


    正确答案： C
    解析： 暂无解析

  • 第23题：

    单选题
    The instance abnormally terminates because of a power outage. Which statement is true about redolog files during instance recovery（）
    A

    Inactive and current redo log files are required to accomplish recovery.

    B

    Online and archived redo log files are required to accomplish instance recovery.

    C

    All redo log entries after the last checkpoint are applied from redo log files to data files.

    D

    All redo log entries recorded in the current redo log file until the checkpoint position are applied to datafiles.


    正确答案： A
    解析： 暂无解析

  • 第24题：

    单选题
    Which statement about recovering from the loss of a redo log group is true？（）
    A

     If the lost redo log group is ACTIVE， you should first attempt to clear the log file.

    B

     If the lost redo log group is CURRENT， you must clear the log file.

    C

     If the lost redo log group is ACTIVE， you must restore，perform cancel-based incomplete recovery，and open the database using the RESETLOGS option.

    D

     If the lost redo log group is CURRENT， you must restore，perform cancel-based incomplete recovery，and open the database using the RESETLOGS option.


    正确答案： D
    解析： 暂无解析

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