a2zinterviews

17.	What are the components of the Designer interface?
	In Designer, you create a universe using three areas: the Universe pane, the Structure pane, the Table Browser. The Universe pane displays the components of the universe from the point of view of Business Objects; that is the classes, objects, and conditions. The Structure pane reflects the underlying database structure of the universe including the tables, columns, and joins. The Table Browser is the component that lets you create the classes and objects of the universe from the tables and columns of a database.
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18.	What are strategies?
	A strategy is a script that automatically extracts structural information from a database or flat file.
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19.	What are the different types of Strategies?
	In Designer we can specify two types of strategies: Built in strategies: Designer provides a number of default strategies which we can use. These are strategies for extracting joins, detecting cardinalities, and creating default classes and objects. Options for indicating default strategies are located in the Database tab of the Options dialog box. External strategies: We can also create our own strategies. Such strategies are referred to as external strategies. With an external strategy, we can specify the exact way that objects and joins are to be extracted from the database structure. The strategy we use, for example, can be a script generated from a CASE Access tool. An external strategy is specific to one RDBMS.
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20.	Can a universe have more than one fact table?
	Yes. Typically a universe can have more than one fact table and numerous aggregated tables.
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