参考答案和解析
正确答案: F
解析: 暂无解析
更多“单选题Which background process reads the redo log buffer and writes it to a file?()A ARCnB DBWnC CKPTD LGWRE PMONF SMON”相关问题
  • 第1题:

    Which background process sequentially writes Flashback Database data from the flashback buffer to the Flashback Database logs?()

    • A、 DBWn
    • B、 RECO
    • C、 RVWR
    • D、 LGWR

    正确答案:C

  • 第2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:F

  • 第3题:

    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.

    正确答案:A

  • 第4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5题:

    While connected to the database,a user on a PC receives a fatal error and the machine reboots. Which background process cleans up the failed connection?()

    • A、ARCn
    • B、CKPT
    • C、DBWn
    • D、LGWR
    • E、PMON
    • F、SMON

    正确答案:E

  • 第6题:

    Note the following functionalities of various background processes:  1:Record the checkpoint information in data file headers. CKPT  2:Perform recovery at instance startup. SMON  3:Cleanup unused temporary segments. SMON  4:Free the resources used by a user process when it fails.  5:Dynamically register database services with listeners.  6:Monitor sessions for idle session timeout.  Which option has the correct functionalities listed for a background process()

    • A、Archiver Process (ARCn):1, 2,5
    • B、System Monitor Process (SMON):1,4,5
    • C、Process Monitor Process (PMON):4,5,6
    • D、Database Writer Process (DBWn):1,3,4

    正确答案:C

  • 第7题:

    Which component of the SGA stores parsed SQL statements is used for process sharing?()

    • A、Buffer cache 
    • B、Redo log buffer 
    • C、Private SQL area 
    • D、Library cache 
    • E、Row cache 

    正确答案:C

  • 第8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9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10题:

    单选题
    Which background process sequentially writes Flashback Database data from the flashback buffer to the Flashback Database logs?()
    A

     DBWn

    B

     RECO

    C

     RVWR

    D

     LGWR


    正确答案: A
    解析: 暂无解析

  • 第11题:

    单选题
    Note the functionalities of various background processes:  1:Perform recovery at instance startup. SMON  2:Free the resources used by a user process when it fails. PMON  3:Cleanup the database buffer cache when a process fails. PMON  4:Dynamically register database services with listeners. PMON  5:Monitor sessions for idle session timeout. PMON  6:Cleanup unused temporary segments. SMON  7:Record the checkpoint information in control file. CKPT  Which option has the correct functionalities listed for a background process()
    A

    Checkpoint (CKPT): 1, 2, 5

    B

    System Monitor (SMON): 1, 6

    C

    Process Monitor (PMON): 4, 6, 7

    D

    Database Writer (DBWR): 1, 3, 4


    正确答案: D
    解析: 系统监视器进程(SMON) 在实例启动时执行恢复(如果需要)。SMON 还负责清除不再使用的临时段。如果在实例恢复过程中由于文件读取或脱机错误跳过任何已终止的事务处理,则SMON 将在表空间或文件重新联机时恢复这些事务处理。SMON 定期检查以查看是否需要该进程。其它进程在检测到需要SMON 时也可以调用它。

  • 第12题:

    单选题
    Note the following functionalities of various background processes:  1:Record the checkpoint information in data file headers. CKPT  2:Perform recovery at instance startup. SMON  3:Cleanup unused temporary segments. SMON  4:Free the resources used by a user process when it fails.  5:Dynamically register database services with listeners.  6:Monitor sessions for idle session timeout.  Which option has the correct functionalities listed for a background process()
    A

    Archiver Process (ARCn):1, 2,5

    B

    System Monitor Process (SMON):1,4,5

    C

    Process Monitor Process (PMON):4,5,6

    D

    Database Writer Process (DBWn):1,3,4


    正确答案: D
    解析: 进程监视器进程(PMON) 在用户进程失败时执行进程恢复。PMON 负责清除数据库缓冲区高速缓存以及释放该用户进程使用的资源。例如,它重置活动事务处理表的状态,释放锁,并且从活动进程列表中删除该进程ID。PMON定期检查分派程序和服务器进程的状态,并重新启动任何已停止运行(但并非Oracle DB 故意终止)的分派程序和服务器进程。PMON 还将有关实例和分派程序进程的信息注册到网络监听程序。与SMON 一样,PMON 定期检查以查看是否需要执行;如果其它进程检测到需要该进程,也可以调用它。

  • 第13题:

    You enabled block change tracking for faster incremental backups in your database. Which background process writes to the change tracking file?()

    • A、 RBAL
    • B、 CKPT
    • C、 SMON
    • D、 PMON
    • E、 MMON
    • F、 CTWR
    • G、 DBWR

    正确答案:F

  • 第14题:

    Note the functionalities of various background processes:  1:Perform recovery at instance startup. SMON  2:Free the resources used by a user process when it fails. PMON  3:Cleanup the database buffer cache when a process fails. PMON  4:Dynamically register database services with listeners. PMON  5:Monitor sessions for idle session timeout. PMON  6:Cleanup unused temporary segments. SMON  7:Record the checkpoint information in control file. CKPT  Which option has the correct functionalities listed for a background process()

    • A、Checkpoint (CKPT): 1, 2, 5
    • B、System Monitor (SMON): 1, 6
    • C、Process Monitor (PMON): 4, 6, 7
    • D、Database Writer (DBWR): 1, 3, 4

    正确答案:B

  • 第15题:

    You are analyzing the components of the redo log mechanisms in your Oracle database. Which of the following purposes does the CKPT process serve?()

    • A、Writes buffers to disk 
    • B、Writes current redo log number to datafile headers 
    • C、Writes redo log information to disk 
    • D、Reads information into memory for users

    正确答案:B

  • 第16题:

    Which Oracle background process frees SGA resources that were allocated to a user process that failed?()

    • A、PMON
    • B、SMON
    • C、CKPT
    • D、LGWR
    • E、ARCn

    正确答案:A

  • 第17题:

    The Log Writer (LGWR) process reads information from the ()and writes it to the online logs.

    • A、large pool
    • B、shared pool
    • C、data buffer cache
    • D、redo log buffer
    • E、data dictionary cache

    正确答案:D

  • 第18题:

    Which background process reads the redo log buffer and writes it to a file?()

    • A、ARCn
    • B、DBWn
    • C、CKPT
    • D、LGWR
    • E、PMON
    • F、SMON

    正确答案:D

  • 第19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20题:

    当失败的实例再次启动时,()可以执行紧急恢复操作。

    • A、LGWR
    • B、DBWn
    • C、CKPT
    • D、SMON

    正确答案:D

  • 第21题:

    单选题
    The Log Writer (LGWR) process reads information from the ()and writes it to the online logs.
    A

    large pool

    B

    shared pool

    C

    data buffer cache

    D

    redo log buffer

    E

    data dictionary cache


    正确答案: C
    解析: 暂无解析

  • 第22题:

    单选题
    You enabled block change tracking for faster incremental backups in your database. Which background process writes to the change tracking file?()
    A

     RBAL

    B

     CKPT

    C

     SMON

    D

     PMON

    E

     MMON

    F

     CTWR

    G

     DBWR


    正确答案: B
    解析: 暂无解析

  • 第23题:

    单选题
    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.


    正确答案: A
    解析: 暂无解析