Your multitenant container database, CDB1, is running in ARCHIVELOG mode and has two pluggable databases, HR_PDB and ACCOUNTS_PDB. An RMAN backup exists for the database.You issue the command to open ACCOUNTS_PDB and find that the USERDATA.DBF data file f

题目

Your multitenant container database, CDB1, is running in ARCHIVELOG mode and has two pluggable databases, HR_PDB and ACCOUNTS_PDB. An RMAN backup exists for the database.You issue the command to open ACCOUNTS_PDB and find that the USERDATA.DBF data file for the default permanent tablespace USERDATA belonging to ACCOUNTS_PDB is corrupted.What should you do before executing the commands to restore and recover the data file in ACCOUNTS_PDB?（）

A. Place CDB1 in the mount stage and then the USERDATA tablespace offline in ACCOUNTS_PDb.

B. Place CDB1 in the mount stage and issue the ALTER PLUGGABLE DATABASE accounts_pdb CLOSE IMMEDIATE command.

C. Issue the ALTER PLUGGABLE DATABASE accounts_pdb RESTRICTED command.

D. Take the USERDATA tablespace offline in ACCOUNTS_PDb.

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  • 第1题：

    Youhavecreatedascriptintherecoverycatalogcalledbackup_database.Whichofthefollowingcommandswouldsuccessfullyexecutethatscript?()

    A.run{openscriptbackup_database；runscriptbackup_database}

    B.run{engagescriptbackup_database；}

    C.run{runscriptbackup_database；}

    D.Run{executescriptbackup_database；}

    E.Thenamebackup_databaseisaninvalidnameforanRMANscript.TryingtorunitfromRMAN wouldresultinanerror.


    参考答案：D

  • 第2题：

    AcustomerwantstopurchaseaWindows2003DataCenterEditionsystemtorunanapplication.TheapplicationbenefitsthemostbycachingavastamountofdatainRAMsotheuserdoesnothavetowaitfordiskI/Owhileediting.Processingissecondinimportance.Ifcostisnotanissue，whatmachinewillhavethebestperformance？（）

    A.Useanx360running4MPprocessorswith16GBofRAM

    B.Useanx360running4DPprocessorswith16GBofRAM

    C.Useanx445running2DPprocessorswith64GBofRAM

    D.Useanx445running4DPprocessorswith64GBofRAM


    参考答案：D

  • 第3题：

    在12MHz的8x51系统里，哪一种方式一次可以定时5ms？

    A．Mode 0 及 Mode 1

    B．Mode 1 及 Mode 2

    C．Mode 3 及 Mode 2

    D．Mode 3 及 Mode 1


    P0

  • 第4题：

    以下程序的输出结果是_____。 include class object {private:int val; public:objec

    以下程序的输出结果是_____。

    include＜iostream.h＞

    class object

    { private:

    int val;

    public:

    object( ) ;

    object(int i) ;

    ～object( ) ;};

    object: :object( )

    { val＝0;

    cout ＜ ＜ "Default constructor for object" ＜ ＜ endl;}

    object: :object(int i)

    { val＝i;

    cout ＜ ＜ "Constructor for object" ＜ ＜ val ＜ ＜ endl;}

    object: :～object( )

    { cout ＜ ＜ "Destructor for object" ＜ ＜ val ＜ ＜ endl;}

    class container{ private:

    object one;

    object two;

    int data;

    public:

    container( ) ;

    container(int i,int j,int k) ;

    ～container( ) ;};

    container: :container( )

    { data＝0;

    cout ＜ ＜ "Default constructor for container" ＜ ＜ endl;}

    container: :container(int i,int j,int k) :two(i) ,one(j)

    { data＝k;

    cout ＜ ＜ "Constructor for container" ＜ ＜ endl;}

    container: :～container( )

    { cout ＜ ＜ "Destructor for container" ＜ ＜ endl;}

    void main( )

    { container anObj(5,6,10) ;}


    正确答案：Constructor for object6 Constructor for object5 Constructor for container Destructor for container Destructor for object5 Destructor for object6
    Constructor for object6 Constructor for object5 Constructor for container Destructor for container Destructor for object5 Destructor for object6 解析：C＋＋语言中的构造函数和析构函数分别是在声明对象时和对象调用完毕后调用，本题中的调用就是这样成对出现的。

  • 第5题：

    （ ） – Is Miss White __________ English teacher, Maria?

    – No, she teaches __________ geography.

    A．your；my

    B．you；mine

    C．you；us

    D．your；us


    正确答案：D

  • 第6题：

    在12MHz的8x51系统里，哪一种方式一次可以定时5ms？ （)。

    A．Mode 3 及 Mode 2

    B．Mode 1 及 Mode 2

    C．Mode 0 及 Mode 1

    D．Mode 1 及 Mode 3


    A

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