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View the Exhibit exhibit1 to examine the series of SQL commands. View the Exhibit exhibit2 to examine the plans available in the SQL plan baseline. The baseline in the first row of the Exhibit is created when OPTIMIZER_MODE was set to FIRST_ROWS.Which sta

题目

View the Exhibit exhibit1 to examine the series of SQL commands. View the Exhibit exhibit2 to examine the plans available in the SQL plan baseline. The baseline in the first row of the Exhibit is created when OPTIMIZER_MODE was set to FIRST_ROWS.Which statement is true if the SQL query in exhibit1 is executed again when the valueof OPTIMIZER_MODE is set to FIRST_ROWS?（）

A. The optimizer uses a new plan because none of the plans in the exhibit2 are fixed plans.

B. The optimizer uses the plan in the second row of the exhibit2 because it is an accepted plan.

C. The optimizer uses the plan in the first row of the exhibit2 because it is the latest generated plan.

D. The optimizer uses the plan in the first row of the exhibit2 because OPTIMIZER_MODE was set to FIRST_ROW during its creation.

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  • 第1题：

    Exhibit:Exhibit:YouworkasanetworkengineeratCompany.Youstudytheexhibitcarefully.WhichGLBPdevicehostsreceivetheMACaddressassignment?()

    A.R1

    B.R2

    C.TheAVG

    D.TheAVF

    E.Noneoftheotheralternativesapply


    参考答案：D

  • 第2题：

    从菜单选择（）命令恢复原理图完整视图。

    A．View→ Fit All Objects

    B．View→Area

    C．view →zoomIn

    D．view →zoomOut


    View→ Fit All Objects

  • 第3题：

    使用SQL语句方法修改View_book视图，视图中包括书名、图书分类、作者、出版社列，写出命令语句。


    正确

  • 第4题：

    A vessel towing astern in an operation which severely restricts the towing vessel and her tow in their ability to change course shall，when making way，exhibit ______.

    A.the masthead lights for a towing vessel

    B.the lights for a vessel restricted in its ability to maneuver

    C.sidelights，stern light and towing light

    D.All of the above


    正确答案：D

  • 第5题：

    对于View类，一般包含哪些内部接口实现事件监听。（）

    A．View.OnClickListener

    B．View.OnKeyListener

    C．View.OnLongClickListener

    D．View.OnTouchListener


    View.OnClickListener;View.OnKeyListener;View.OnLongClickListener;View.OnTouchListener

  • 第6题：

    【填空题】创建、修改和删除视图命令分别是__________view、_________ view和_________ view


    CREATE VIEW

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