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单选题
Oracle9i extends the cursor sharing functionality with the new value of SIMILAR for the CURSOR_SHARING parameter. With CURSOR_SHARING = SIMILAR， cursors are shared for safe literals only. What is meant by ‘safe literals only’？（）
A
No literal value is substituted for a shared cursor.
B
Different execution plans are generated for substituted literal values.
C
The substitution of a literal value will produce different execution plans.
D
The substitution of any literal value will produce exactly the same execution plan.
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Oracle9i extends the cursor sharing functionality with the new value of SIMILAR for the CURSOR_SHARING parameter. With CURSOR_SHARING = SIMILAR， cursors are shared for safe literals only. What is meant by ‘safe literals only’？（） A、No literal value is substituted for a shared cursor. B、Different execution plans are generated for substituted literal values. C、The substitution of a literal value will produce different execution plans. D、The substitution of any literal value will produce exactly the same execution plan.
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You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. The application uses the drag-and-drop functionality. You need to ensure that the drag-and-drop operation is stopped when a user moves the cursor outside the boundaries of the application form. Which enumeration member should you use?（）A、DragAction.CancelB、DragAction.DropC、DragDropEffects.NoneD、DragDropEffects.All
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考题
单选题Which of the following best describes the lock protection provided by DB2 for the current row of a cursor?（）A
The cursor is only protected from updates and deletes by concurrent applications.B
The row is only protected from positioned updates and deletes that reference another cursor of the same application.C
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The row is protected from updates and deletes by the current application and from positioned updates and deletes that reference another cursor of the same application.
考题
单选题How can you change the cursor style in your form? （）A
Open the form module property palette and set the Cursor Style property. B
From the Tools menu, select Preferences--Runtime Settings. C
Use the GET_APPLICATION_PROPERTY and SET_APPLICATION_PROPERTY built-ins. D
You cannot change the cursor style.
考题
单选题You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. The application uses the drag-and-drop functionality. You need to ensure that the drag-and-drop operation is stopped when a user moves the cursor outside the boundaries of the application form. Which enumeration member should you use?（）A
DragAction.CancelB
DragAction.DropC
DragDropEffects.NoneD
DragDropEffects.All
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