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mid_VI_Dw - [8 Q.2 Why it is recommended to have finest...

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Birla Institute of Technology & Science, Pilani Distance Learning Programmes Division First Semester 2007-2008 Mid-Semester Test (EC-1 Regular) Course No. : SS ZG515 Course Title : DATA WAREHOUSING Nature of Exam : Closed Book Weightage : 40% Duration : 2 Hours Date of Exam : 04/08/2007 (AN) Note: 1. Please follow all the Instructions to Candidates given on the cover page of the answer book. 2. All parts of a question should be answered consecutively. Each answer should start from a fresh page. 3. Mobile phones and computers of any kind should not be brought inside the examination hall. 4. Use of any unfair means will result in severe disciplinary action. Q.1 Discuss in detail the role of look-up tables in dimensional modeling.
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Unformatted text preview: [8] Q.2 Why it is recommended to have finest granularity data in the data warehouse? What are the advantages and disadvantages of doing so? [8] Q.3 Explain why most data warehouse implementations are closer to Kimball’s bottom-up approach? What other alternatives approaches are available? [8] Q.4 What are the advantages and disadvantages of using the relational database technology in data warehousing? [8] Q.5 A dimension can appear many times in a fact table. What kind of problems this can cause? Discuss how such situations are handled in dimensional modeling? Give an example. [8] ******* No. of Pages = 1 No. of Questions = 5...
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