單項(xiàng)選擇題

You want to implement a master-detail relation between data blocks based on object tables. How would you do this? （）

A.Create the relation manually and coordinate the blocks using triggers.
B.Base the relation on a REF pointer using the Data Block Wizard.
C.Base the relation on a foreign key using the Data Block Wizard.
D.This task is not possible because master-detail relations can be implemented only for blocks based on relation tables.

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單項(xiàng)選擇題

A sales analyst reviews the first draft on your Sales application, and requests that the application graphically represent revenue generated for each sales representative, in addition to the textual data currently displayed for the ORDER block. How would you incorporate this graphic in your form? （）

A.Invoke the Chart Wizard and create a chart based on the ORDER block.
B.Create a chart using Graphics Builder and then select File Import Chart in Form Builder, positioning the new chart with the text items in the ORDER block.
C.Invoke the Data Block Wizard in reentrant mode, select the Charts tab, and specify the chart type and column sources for the X and Y axes.
D.Select the Chart node in the Object Navigator, Click the Create icon, and specify the details of the chart in the chart's Property Palette.

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You are building two forms. Each form has a button and a non-base table field. When the button is pressed, a complicated calculation is executed. The calculation is the same for both forms. The calculation code does not query or change the data in the database. When the calculation completes, it returns a single value to the non-base table field. To optimize performance and maintainability, which PL/SQL structure should be used? （）

A.A trigger in each form.
B.A subprogram in each form.
C.A stored subprogram in the database.
D.A subprogram in a library that is attached to each form.

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