Which two statements are true about encrypting RMAN backup?()A. The transparent encryption of backups uses the encryption walletB. The database uses the same encryption key for every encrypted backupC. The password encryption of backups only uses the pass

题目
Which two statements are true about encrypting RMAN backup?()

A. The transparent encryption of backups uses the encryption wallet

B. The database uses the same encryption key for every encrypted backup

C. The password encryption of backups only uses the password while creating and restoring backup

D. If transparent encryption is configured, you cannot use the SET ENCRYPTION BY PASSWORD command to make password-protected backups.


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  • 第1题:

    Youperformdifferentialincrementallevel1backupsofyourdatabaseoneachworkingdayandlevel0backuponSundays,totape.Whichtwostatementsaretrueaboutdifferentialincrementalbackups()

    A.ThebackupperformedonSundayscontainsalltheblocksthathaveeverbeenusedinthedatabase.

    B.ThebackupperformedonSundayscontainsalltheblocksthathavechangedsincethelastlevel1backup.

    C.Thebackupperformedoneachworkingdaycontainsalltheblocksthathavechangedsincethelastlevel0 backup.

    D.ThebackupperformedonMondaycontainsalltheblocksthathavechangedsincethelevel0backup,and everyotherworkingdaycontainsalltheblocksthathavechangedsincethelevel1backup


    参考答案:A, D

  • 第2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3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4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5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6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。