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Which two statements are true about the RMAN validate database command?()A. It checks the database for intrablock corruptions.B. It can detect corrupt pfiles.C. It can detect corrupt spfiles.D. It checks the database for interblock corruptions.E. It can d

题目
Which two statements are true about the RMAN validate database command?()

A. It checks the database for intrablock corruptions.

B. It can detect corrupt pfiles.

C. It can detect corrupt spfiles.

D. It checks the database for interblock corruptions.

E. It can detect corrupt block change tracking files.

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1.下列CASE语句中执行结果不为空的是()A、SELECTCASEWHEN125THEN'true'ELSE'false'END;B、SELECTCASEBINARY'B'WHEN'a'THEN1WHEN'b'THEN2END;C、SELECTCASEWHEN-10THEN'true'END;D、SELECTCASE'one'WHEN1THEN'one'WHEN2THEN'two'END;

2.Examinethefollowingcommandusedtoperformincrementallevel0backup：RMAN>BACKUPINCREMENTALLEVEL0DATABASE；Toenabletheblockchangetracking，aftertheincrementallevel0backupyouissuedthefollowingcommand：SQL>ALTERDATABASEENABLEBLOCKCHANGETRACKINGUSINGFILE’/mydir/rman_change_track.f’；Toperformincrementallevel1cumulativebackup，youissuedthefollowingcommand：RMAN>BACKUPINCREMENTALLEVEL1CUMULATIVEDATABASE；Whichtwostatementsaretrueintheabovesituation？（）A.Theblockchangetrackingdatawillbeusedonlyfromthenextincremental0backup.B.Theincrementalbackupwillusechangetrackingdataforaccomplishingthebackup.C.Theincrementalbackupwillnotusechangetrackingdataforaccomplishingthebackup.D.Theblocktrackfilewillscanalltheblocksandcreatebitmapforalltheblocksbackedupinthelevel0backup.

3.YouaremaintainingthePRODdatabaseforNetFxCorporation.Youhaveconfiguredcontrolfileautobackupinyourdatabase.At6：00P.M.onMonday，youissuethefollowingcommand：RMAN>BACKUPDATABASE；At8：00A.M.onTuesday，youareunabletostartthedatabasebecauseallthecontrolfilesaremissing.YoudecidetorestorethecontrolfilesfromthebackupbyusingtheRMAN>RESTORECONTROLFILEFROMAUTOBACKUP；command.WhichoperationshouldyouperformbeforeusingtheRMAN>RESTORECONTROLFILEFROMAUTOBACKUP；command？（）

4.Examine the following command used to perform incremental level 0 backup:RMAN> BACKUP INCREMENTAL LEVEL 0 DATABASE;To enable the block change tracking, after the incremental level 0 backup you issued the following command:SQL> ALTER DATABASE ENABLE BLOCK CHANGE TRACKING USINGFILE ‘/mydir/rman_change_track.f‘;To perform incremental level 1 cumulative backup, you issued the following command:RMAN> BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE;Which two statements are true in the above situation?（）A. The block change tracking data will be used only from the next incremental 0 backup.B. The incremental backup will use change tracking data for accomplishing the backup.C. The incremental backup will not use change tracking data for accomplishing the backup.D. The block track file will scan all the blocks and create bitmap for all the blocks backed up in the level 0 backup.

更多“Which two statements are true about the RMAN validate database command?() ”相关问题

  • 第1题：

    You performed an incremental level 0 backup of a database:RMAN > BACKUP INCREMENTAL LEVEL 0 DATABASE;To enable block change tracking after the incremental level 0 backup, you issued this command:SQL > ALTER DATABASE ENABLE BLOCK CHANGE TRACKING USING FILE ‘ /mydir/rman_change_track.f’;To perform an incremental level 1 cumulative backup, you issued this command:RMAN> BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE;Which three statements are true?（）

    A. Backup change tracking will sometimes reduce I/O performed during cumulative incremental backups.

    B. The change tracking file must always be backed up when you perform a full database backup.

    C. Block change tracking will always reduce I/O performed during cumulative incremental backups.

    D. More than one database block may be read by an incremental backup for a change made to a single block.

    E. The incremental level 1 backup that immediately follows the enabling of block change tracking will not read the change tracking file to discover changed blocks.


    参考答案：B, C, E

  • 第2题：

    下列复选框构造方法，错误的是()。

    A．setLayout(newGridLayout(3,1));

    B．add(newCheckbox("one",null,true));

    C．add(newCheckbox("tWO");

    D．add(newCheckbox("one",true);


    正确答案：D

  • 第3题：

    12． About_______ of the workers in the factory were born in the __________．

    A． two- thirds;1970

    B． two- thirds ; 1970s

    C． two-third ; 1970

    D． two-third ; 1970s


    正确答案：B
    12．B【解析】句意：工厂里大约2/3的工人出生在20世纪70年代。分数的表达为分子用基数词，分母用序数词，如果分子大于1，则分母要用复数，排除C、D，年代的表达要在年份后加s．故选B。

  • 第4题：

    下列复选框构造方法，错误的是 ( )

    A．setLayout(new GridLayout(3，1))；

    B．add(new Checkbox("one"，null，true))；

    C．add(new Checkbox("two"))；

    D．add(new Checkbox("one"，true))；


    正确答案：D
    解析：该题考查复选框的构造方法。构造方法的一般格式为：public Checkbox (String label，CheckboxGrou Pgroup，boolean state)。选项A、B、C都是正确的，而选项D是错误的，它的第二个参数应该是CheckboxGrou Pgroup，所以选项D是错误的。

  • 第5题：

    About ________ of the workers in the factory were born in the ________.

    A.two-thirds, 1970 B.two-thirds, 1970s C.two-third,1970 D.two-third, 1970s


    正确答案：B

  • 第6题：

    14、下列哪个是正确的Maven生命周期中阶段的顺序。

    A．verify-compile-test-package-validate

    B．validate-compile-test-package-verify

    C．validate-compile-test-verify-package

    D．verfify-validate-compile-test-package


    C

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