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An application writes to a log file in the /logs filesystem that is full. After the log file is deleted, 'df' still shows the filesystem as 100% full. What is the likely cause of the problem and what will resolve it?（）A、The deleted file is still open by

题目

An application writes to a log file in the /logs filesystem that is full. After the log file is deleted, 'df' still shows the filesystem as 100% full. What is the likely cause of the problem and what will resolve it?（）

  • A、The deleted file is still open by the application.The system must be rebooted before'df' will show the reduction in the filesystem.
  • B、The deleted file is still open by the application.The application must be stoppedbefore 'df' will show the reduction in the filesystem.
  • C、The filesystem is still marked as full in the /etc/fs.status file.The system must be rebooted before 'df' will show the reduction in the filesystem.
  • D、The filesystem is still marked as full in the /etc/fs.status file.The application must be stopped before 'df' will show the reduction in the filesystem.
相似考题

1.Full Atomicity, Consistency, Isolation, Durability (ACID) compliance is a necessity for a new application, which heavily reads and writes data.This requires the following config file options: Sync_binlog=1 Innodb_flush_log_at_trx_commit=1 Innodb_doublewrite=1 However, this configuration is expected to introduce disk I/O overhead.What three changes will reduce disk I/O overheads?（）A.Use of soft links for database directories on the same physical diskB.Use of delay_key_write=ON for batch index updateC.Allocation of RAM to the buffer pool such that more of the data can fit in RAMD.Placement of InnoDB log files and datadir on separate physical disksE.Use of separate directories on the same physical disk for log files and data files

2.A TCP/IP application is transferring files from a personal machine to a remote machine.  The application writes 32 kilobytes of data at a time to the socket， but has not issued a system call to set the window size.  Which of the following procedures should be performed on the personal machine to increase the throughput of the application？（）A、 Increase the size of thewallB、 Increase the size of sb_maxC、 Increase the size of tcp_recvspaceD、 Increase the size of tcp_sendspace

3.After installing WebSphere Commerce，the WebSphere Application Server fails to start.  Which log file will help determine if WebSphere Application Server was installed correctly？（）A、<WAS_installdir>/logs/log.txt B、<WC_installdir>/logs/install_date_time.log C、<WAS_installdir>/logs/<WC_instance_name>/SystemOut.log D、<WC_installdir>/instances/<instance_name>/xml/<instance_name>.xml E、<WAS_installdir>/logs/serverStatus.log

4.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

更多“An application writes to a log ”相关问题

  • 第1题：

    As part of fallover testing of a corporate database server， client application connectivity must be  verified. Which of the following would best verify the application functionality？（）  

    • A、 Perform a ping client verification test.
    • B、 Review the number of active application processes.
    • C、 Perform successful reads and writes to the application.
    • D、 Run netstat -an to verify client connections to the listening ports.

    正确答案:C

  • 第2题：

    Which two statements about the background process of the database writer are true（）

    • A、It is possible to have multiple database writers in an Oracle instance.
    • B、It writes dirty buffers， if any， to data files whenever a checkpoint occurs.
    • C、It writes dirty buffers， if any， to data files whenever a transaction commits.
    • D、It writes dirty buffers， if any， to data files before the log writer （LGWR） writes

    正确答案:A,B

  • 第3题：

    Which two statements about the background process of thedatabase writerare true（） 

    • A、It is possible to have multiple database writers in an Oracle instance.
    • B、It writes dirty buffers， if any， to data files whenever a checkpoint occurs.
    • C、It writes dirty buffers， if any， to data files whenever a transaction commits.
    • D、It writes dirty buffers， if any， to data files before the log writer （LGWR） writes.

    正确答案:A,B

  • 第4题：

    You are installing an application on a computer that runs Windows Server 2008. During installation， the application will nedd to install new attributes and classes to the Active Directory database. You need to ensure that you can install the application. What should you do（）

    • A、Change the functional level of the forest to WIndows Server 2008.
    • B、Log on by using an account that has Server Operator rights.
    • C、Log on by using an account that has Schema Administrator rights and the appropriate rights to install the application.
    • D、Log on by using an account that has the Enterprise Administrator  rights and the appropriate rights to install the application.

    正确答案:C

  • 第5题：

    You are installing an application on a computer that runs Windows Server 2008 R2. During  installation， the application will need to add new attributes and classes to the Active Directory  database.     You need to ensure that you can install the application.     What should you do（）

    • A、Change the functional level of the forest to Windows Server 2008 R2.
    • B、Log on by using an account that has Server Operator rights.
    • C、Log on by using an account that has Schema Administrator rights and the appropriate rights to install the applicatio
    • D、Log on by using an account that has the Enterprise Administrator rights and the appropriate rights to install the app

    正确答案:C

  • 第6题：

    单选题
    After installing WebSphere Commerce，the WebSphere Application Server fails to start.  Which log file will help determine if WebSphere Application Server was installed correctly？（）
    A

    <WAS_installdir>/logs/log.txt 

    B

    <WC_installdir>/logs/install_date_time.log 

    C

    <WAS_installdir>/logs/<WC_instance_name>/SystemOut.log 

    D

    <WC_installdir>/instances/<instance_name>/xml/<instance_name>.xml 

    E

    <WAS_installdir>/logs/serverStatus.log


    正确答案： A
    解析： 暂无解析

  • 第7题：

    多选题
    Full Atomicity, Consistency, Isolation, Durability (ACID) compliance is a necessity for a new application, which heavily reads and writes data. This requires the following config file options: Sync_binlog=1 Innodb_flush_log_at_trx_commit=1 Innodb_doublewrite=1 However, this configuration is expected to introduce disk I/O overhead. What three changes will reduce disk I/O overheads?（）
    A

    Use of soft links for database directories on the same physical disk

    B

    Use of delay_key_write=ON for batch index update

    C

    Allocation of RAM to the buffer pool such that more of the data can fit in RAM

    D

    Placement of InnoDB log files and datadir on separate physical disks

    E

    Use of separate directories on the same physical disk for log files and data files


    正确答案： D,A
    解析： 暂无解析

  • 第8题：

    多选题
    Which two statements about the background process of thedatabase writerare true（）
    A

    It is possible to have multiple database writers in an Oracle instance.

    B

    It writes dirty buffers， if any， to data files whenever a checkpoint occurs.

    C

    It writes dirty buffers， if any， to data files whenever a transaction commits.

    D

    It writes dirty buffers， if any， to data files before the log writer （LGWR） writes.


    正确答案： D,A
    解析： 数据库写进程(DBWn) 可以将缓冲区的内容写入数据文件。DBWn进程负责将数据库缓冲区高速缓存中经过修改的缓冲区（脏数据缓冲区）写入磁盘。虽然对于大多数系统来说，一个数据库写进程(DBW0) 已经足够，但如果系统需要频繁修改数据，则可以配置附加进程（DBW1到DBW9以及DBWa到DBWj）以改进写性能（A正确，可以有很多个dbwr进程）。这些附加DBWn进程在单处理器系统中没有用。 
    当数据库缓冲区高速缓存中的某个缓冲区被修改时，系统会将其标记为脏数据缓冲区，并将其添加到按SCN 顺序存放的灰数据缓冲区的LRUW（LRU 写）列表中。因此，该顺序与为这些更改的缓冲区写入重做日志的重做操作的顺序相匹配。当缓冲区高速缓存中的可用缓冲区的数量低于某个内部阈值（达到服务器进程发现很难获取可用缓冲区的程度）时，DBWn会将灰数据缓冲区写入数据文件，写入顺序与按照LRUW 列表的顺序修改灰数据缓冲区的顺序相同。 SGA 包含的内存结构具有重做流中的某个位置的重做字节地址(RBA)，当实例发生故障时，将从该位置开始恢复。此结构充当指向重做的指针，并且由CKPT 进程按照每三秒一次的频率写入控制文件。由于DBWn按照SCN 顺序写入灰数据缓冲区，而重做按照SCN 顺序执行，因此每当DBWn从LRUW 列表写脏数据缓冲区时，还会将SGA 内存结构中保持的指针前移，以便实例恢复（如果需要）从近似正确的位置开始读取重做，并避免不需要的I/O。这称为―增量检查点‖。 
    注：还有其它一些DBWn可能会执行写操作的情况，例如，当表空间被设置为只读或被置于脱机状态时。在这些情况下，不会出现增量检查点，因为仅属于相应数据文件的灰数据缓冲区在写入数据库时的顺序与SCN 顺序无关。 
    LRU 算法将更频繁访问的块保存在缓冲区高速缓存中，这样，在将缓冲区写入磁盘时，缓冲区不大可能包含将很快有用的数据。 
    DB_WRITER_PROCESSES初始化参数指定DBWn进程数。DBWn进程的最大数目为20。 
    如果用户在启动过程中未指定该进程数，Oracle DB 将根据CPU 和处理器组的数量来决定如何设置DB_WRITER_PROCESSES。 
    在以下情况下，DBWn进程将脏数据缓冲区写入磁盘： 
    • 当服务器进程在扫描阈值数目的缓冲区之后找不到干净的可重用缓冲区时，通知DBWn执行写操作。DBWn在执行其它处理的同时，将灰数据缓冲区异步写入磁盘。 
    •DBWn定期写缓冲区以推进检查点。检查点是重做线程（日志）中开始执行实例恢复的位置。该日志位置由缓冲区高速缓存中最旧的脏数据缓冲区确定。 
    在所有情况下，DBWn均执行成批（多块）写操作以提高效率。多块写操作中写入的块数因操作系统而异。 C答案：是LGWR进程 
    D答案：LGWR先记，DBWR后写。 
    LGWR 的写入速度通常足够快，可以确保缓冲区中始终有空间可供新条目使用，即使对重做日志的访问量很大时也是如此。LGWR 将缓冲区的一个连续部分写入磁盘。 LGWR 在以下情况下执行写操作： • 用户进程提交事务处理时 
    • 重做日志缓冲区的三分之一已满时 • 重做日志缓冲区达到1M的redo条目 
    • 在DBWn进程将经过修改的缓冲区写入磁盘（如果需要）之前 • 每隔3 秒 
    必须在与缓冲区更改相关联的所有重做记录写入磁盘后，DBWn才可以向磁盘写入经过修改的缓冲区（先行写协议）。

  • 第9题：

    多选题
    Which two statements about the background process of the database writer are true（）
    A

    It is possible to have multiple database writers in an Oracle instance.

    B

    It writes dirty buffers， if any， to data files whenever a checkpoint occurs.

    C

    It writes dirty buffers， if any， to data files whenever a transaction commits.

    D

    It writes dirty buffers， if any， to data files before the log writer （LGWR） writes


    正确答案： D,B
    解析： 暂无解析

  • 第10题：

    单选题
    You have a computer that runs Windows XP Professional. You attempt to install an application by using a Windows Installer package name app1. msi. The application installation fails. You plan to install the application again. You need to create an application installation log for the application setup. What should you do?（）
    A

    At the command prompt, run msiexec /log app1. msi /passive. 

    B

    At the command prompt, run msiexec /log app1. log /package app1. msi. 

    C

    From the Local Security Policy, enable auditing for object access, and then run app1. msi.

    D

    From the Event Viewer, increase the size of the application log, and then run app1. msi. 


    正确答案： B
    解析： 暂无解析

  • 第11题：

    单选题
    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： F
    解析： 暂无解析

  • 第12题：

    单选题
    An application writes to a log file in the /logs filesystem that is full. After the log file is deleted, 'df' still shows the filesystem as 100% full. What is the likely cause of the problem and what will resolve it?（）
    A

    The deleted file is still open by the application.The system must be rebooted before'df' will show the reduction in the filesystem.

    B

    The deleted file is still open by the application.The application must be stoppedbefore 'df' will show the reduction in the filesystem.

    C

    The filesystem is still marked as full in the /etc/fs.status file.The system must be rebooted before 'df' will show the reduction in the filesystem.

    D

    The filesystem is still marked as full in the /etc/fs.status file.The application must be stopped before 'df' will show the reduction in the filesystem.


    正确答案： B
    解析： 暂无解析

  • 第13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14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15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16题：

    You are installing an application on a computer that runs Windows Server 2008 R2.   During installation， the application will need to add new attributes and classes to the Active Directory  database.   You need to ensure that you can install the application.   What should you do（）

    • A、Change the functional level of the forest to Windows Server 2008 R2.
    • B、Log on by using an account that has Server Operator rights.
    • C、Log on by using an account that has Schema Administrator rights and the appropriate rights to install  the application.
    • D、Log on by using an account that has the Enterprise Administrator rights and the appropriate rights to  install the application.

    正确答案:C

  • 第17题：

    You have 15 computers that run Windows 7. You need to implement a monitoring solution that meets thefollowing requirements. Sends an e-mail notification when an application error is logged in the event log  Runs a script to restart the computer if an application error occurs between 17:00 and 07:00 Minimizes the administrative effort required to monitor applications. What should you do?（）

    • A、On all the computers， configure a custom view. Configure a custom task for the application error events.
    • B、On a computer， configure a custom view to display the application errors. Configure a custom task forthe application error events.
    • C、On a central computer， configure an event subscription. On all of the computers， configure a customtask in the Forwarded Events log.
    • D、On all the computers， configure an event subscription to a central computer. On the central computer，configure a custom task in the Forwarded Events log.

    正确答案:D

  • 第18题：

    单选题
    As part of fallover testing of a corporate database server， client application connectivity must be  verified. Which of the following would best verify the application functionality？（）
    A

     Perform a ping client verification test.

    B

     Review the number of active application processes.

    C

     Perform successful reads and writes to the application.

    D

     Run netstat -an to verify client connections to the listening ports.


    正确答案： C
    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
    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： E
    解析： 暂无解析

  • 第21题：

    单选题
    You discover that the schema changes that were recently made to your SQL Server 2005 database have caused your Web site to stop functioning. It is unclear who made the changes. TestKing.com now mandates that all changes to the database schema be tracked. You need to implement a mechanism that will track schema changes in your database.  What should you do？（）
    A

    Implement a stored procedure that writes data about schema changes to a log table.

    B

    Implement DDL AFTER triggers that write user and schema information to a log table.

    C

    Implement a DML INSTEAD OF trigger that writes data about schema changes to a log table.

    D

    Implement a DML AFTER trigger that writes data about schema changes to a log table.


    正确答案： B
    解析： 暂无解析

  • 第22题：

    单选题
    A TCP/IP application is transferring files from a personal machine to a remote machine.  The application writes 32 kilobytes of data at a time to the socket， but has not issued a system call to set the window size.  Which of the following procedures should be performed on the personal machine to increase the throughput of the application？（）
    A

     Increase the size of thewall

    B

     Increase the size of sb_max

    C

     Increase the size of tcp_recvspace

    D

     Increase the size of tcp_sendspace


    正确答案： A
    解析： 暂无解析

  • 第23题：

    单选题
    You network contains an Exchange Server 2010 Mailbox server.You install and configure a third-party antivirus application on the server.You discover that a mailbox database named DB1 does not mount.You attempt to mount the mailbox database and receive an error message starting that the file named E01.log cannot be found.You need to mount DB1.The solution must prevent the antivirus application from causing the same error. What should you do？（）
    A

    Disable the antivirus application.Restore E01.log from the most recent backup.Run the mount-database DB1 command

    B

    Disable the antivirus application.Restore DB1 from the most recent backup.Run the mount-database DB1 command

    C

    Exclude the transaction log folder from the antivirus application scans.Restore E01.log from the antivirus quarentine.Run the mount-database DB1 command

    D

    Exclude the transaction log folder from the antivirus application scans.Restore DB1 from the most recent backup.Run the mount-database DB1 command


    正确答案： B
    解析： 暂无解析

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