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Within the application MY_APP the following PREVIOUS VALUE expression references the sequence MY_SEQ: PREVIOUS VALUE FOR my_seq After which of the following events will the most recently generated value of MY_SEQ persist so that it can be returned to the

题目

Within the application MY_APP the following PREVIOUS VALUE expression references the sequence MY_SEQ: PREVIOUS VALUE FOR my_seq After which of the following events will the most recently generated value of MY_SEQ persist so that it can be returned to the active MY_APP application?()

A.After a ROLLBACK is issued

B.After the sequence is altered

C.After the sequence is dropped

D.After the current session ends


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  • 第1题:

    在switch(expression)语句中,expression的数据类型不能是( )。

    A.double

    B.char

    C.byte

    D.short


    正确答案:A
    解析: 本题考查考生对swithch(expression)语句的理解。表达式expression只能返回:int、bvte、short和char,题目中的double是不正确的。同时还要注意,多分支结构中,case子句的值必须是常量,而且所有case子句中的值应是不同的,default子句是任选的。

  • 第2题:

    在switch(expression)语句中,expression的数据类型不能是( )。 A.doubleB.char

    在switch(expression)语句中,expression的数据类型不能是( )。

    A.double

    B.char

    C.byte

    D.short


    正确答案:A
    A。【解析】本题考查考生对switch(expression)语句的理解。表达式expression只能返回int、byte、short和char,题目中的double是不正确的。同时还要注意,多分支结构中,case子句的值必须是常量,而且所有case子句中的值应是不同的,default子句是任选的。

  • 第3题:

    for重复结构处理计数器控制循环的所有细节。for结构的一般格式如下: for(expression1, expression2, expression3) statement 其中expression1初始化循环控制变量,expression2是循环条件,expression3递增控制变量。


    B

  • 第4题:

    Aresourcegroup,MY_APP,hasthefollowingconfiguration:ResourceGroupNameMY_APPParticipatingNodeName(s)AlphaBetaGammaStartupPolicyOnlineOnHomeNodeOnlyFalloverPolicyFalloverToNextPriorityNodeInTheListFallbackPolicyFallbackToHigherPriorityNodeInTheListMY_APPiscurrentlyrunningonnodeBeta.MY_APPisthenmovedtonodeGammausingC-SPOC.NodesAlphaandBetaareshutdownandrestarted.NodeAlphastabilizesapprox60secondsbeforenodeBeta.Whathappenstotheresourcegroup,MY_APP,whennodesAlphaandBetaarerestarted?()

    A.ItmovestoBeta

    B.ItstaysonGamma

    C.ItmovestoAlpha

    D.ItmovestoAlpha,thentoBeta


    参考答案:B

  • 第5题:

    【单选题】MySQL中添加外键约束的语句是()

    A.ALTER TABLE...ADD CONSTRAINT...FOREIGN KEY...REFERENCES...

    B.ADD CONSTRAINT...FOREIGN KEY...REFERENCES...

    C.ALTER TABLE...ADD CONSTRAINT...PRIMARY KEY...REFERENCES...

    D.ADD CONSTRAINT...PRIMARY KEY...REFERENCES...


    ALTER TABLE...ADD CONSTRAINT...FOREIGN KEY...REFERENCES...

  • 第6题:

    下面哪项是错误的设置Bean属性值的方法()

    A.<jsp:setPropertyname="beanInstanceName" property= "*" />

    B.<jsp:setPropertyname="beanInstanceName" property="propertyName"value="123"/>

    C.<jsp:setPropertyname="beanInstanceName" property="propertyName"param="parameterName" />

    D.<jsp:setPropertyname="beanInstanceName" property="*" value="{string |<%= expression %>}"/>


    D