To enable faster incremental backups, you enabled block change tracking for the database.Which two statements are true about the block change tracking file?()A. Multiple change tracking files can be created for a database.B. The change tracking file must

题目
To enable faster incremental backups, you enabled block change tracking for the database.Which two statements are true about the block change tracking file?()

A. Multiple change tracking files can be created for a database.

B. The change tracking file must be created after the first level 0 backup.

C. RMAN does not support backup and recovery of the change tracking file.

D. The database clears the change tracking file and starts tracking changes again, after whole database restore and recovery operations.

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更多“To enable faster incremental backups, you enabled block change tracking for the database.Which two statements are true about the block change tracking file?() ”相关问题

  • 第1题：

    YouaremaintainingthePRODdatabaseofTeleSoftCorporation.YouhaveinitializedthefollowingDB_BLOCK_CHECKINGparameterintheinit.orafile:DB_BLOCK_CHECKING=TRUE;Whatwillbetheresultofsettingthisparameter?()

    A.OnlydatablocksoftheSYSTEMtablespacewillbechecked.

    B.OnlydatablocksoftheSYSAUXtablespacewillbechecked.

    C.Achecksumwilloccuronlyonthecheckpoint.

    D.Achecksumwilloccureverytimeablockismodified.


    参考答案：D

  • 第2题：

    WhichRMANbackupcommandisusedtocreatetheblock－changetrackingfile?()

    A.alterdatabasecreateblockchangetrackingfile

    B.alterdatabaseenableblockchangefile

    C.alterdatabaseenableblockchangetrackingusingfile，/ora01/opt/block_change_tracking.fil

    D.altersystemenableblockchangetrackingusingfile’/ora01/opt/block_change_tracking.fil’

    E.altersystemblockchangetrackingon


    参考答案：C

  • 第3题：

    要使文件列表框中的文件随目录列表框中所选择的当前目录的不同而发生变化，应该

    A．在File1中的Change事件中，输入File1．Path=Dir1．Path

    B．在Dirl中的Change事件中，输入File1．Path=Dir1．Path

    C．在File1中的Change事件中，输入Dir1．Path=File1．Path

    D．在Dir1中的Change事件中，输入Dir1．Path=File1．Path


    正确答案：B
    解析：此题考查的是文件列表框与目录列表框的关联问题。当用户触发文件的Change事件时，文件的列表随着目录位置的改变而改变，其中目录为源操作数，位于等号右边，文件为目的操作数，位于等号的左边，所以正确答案为B选项。

  • 第4题：

    Whichdynamicviewdisplaysthestatusofblock－changetracking?()

    A.V$BLOCK_CHANGE

    B.V$BLOCK_CHANGE_TRACKING

    C.V$BLOCKCHANGE

    D.V$BLOCK_TRACKING


    参考答案：B

  • 第5题：

    ______ processing offers many ways to edit text and establish document formats．you can easily insert, delete, change, move and copy words or blocks of text.

    A．Data

    B．Database

    C．Word

    D．File


    正确答案：C
    解析：译文的含义是：()处理提供了多种方式编辑文本，以及建立文档格式。可以很容易地插入、删除、更改、移动和复制文字或文本块。选项A、B、C、D的含义分别是数据、数据库、文字和文件，选项C为正确答案。

  • 第6题：

    在窗体上画一个名称为Drive1的驱动器列表框，一个名称为Dir1的目录列表框，一个名称为File1的文件列表框，两个名称分别为Label1、Label2，标题分别为空白和“共有文件”的标签。编写程序，使得驱动器列表框与目录列表框、目录列表框与文件列表框同步变化，并且在标签kabel1中显示当前文件夹中文件的数量，如图所示。

    能够正确实现上述功能的程序是

    A．Private Sub Dir1_Change( ) Filc1.Path=Dir1.Path End Sub Private Sub Drive1_Change( ) Dir1.Path=Drive1.Drive Label1.Caption=File1.ListCount End Sub

    B．Private Sub Dir1_Change( ) File1.Path=Dir1.Path End Sub Private Sub Drive1_Change( ) Dir1.Path=Drive1.Drive Label1.Caption=File1.List End Sub

    C．Private Sub Dir1_Change( ) File1.Path=Dir1.Path Label1.Caption=File1.ListCount End Sub Private Sub Drive1_Change( ) Dir1.Path=Drive1.Drive Label1.Caption=File1.ListCount End Sub

    D．Private Sub Dir1_Change( ) File1.Path=Dir1.Path Label1.Caption=File1.List End Sub Private Sub Drive1_Change( ) Dir1.Path=Drive1.Drive Label1.Caption=File1.List End Sub


    正确答案：C
    解析：List属性用来列出表项的内容，可以加下标用“()”括起来配合使用。根据题意，应选择文件列表框的ListCount属性，该属性用于返回文件的数量值。故B、D项错误。A项缺少“Label1.Caption=File1.ListCount”这一语句，从而使得在仅触动Dir1的Change事件时，Label1l没有反应。

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