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1.
(a) Design a gennalization and specialization hierarchy for an automobile sales company. The company sells motorcycles, passenger cars, vans and trucks. Justify your placement of attributes at different hierarchy.
(5 Marks)
(b) Write SQL statements for the following:
(i) Grant select on student table to a student Shyam
(ii) Revoke insert, update and delete permission on department table for user Mohan.
(5 Marks)
2.
(a) Explain the followings in the context of XML.
(i) XML Tags
(ii) Document type
(4 Marks)
(b) Create an XML schema for list of their MCA students and their marks of 5th semester course.
(6 Marks)
3.
(a) Explain the role of checkpoints in log based recovery with the help of an example.
(5 Marks)
(b) Define a trigger check-key that does not allow duplicate values in attributes employee no. in employee table.
(5 Marks)
4.
(a) How is clustering and segmentation related to data mining? Explain partitioning clustering algorithms.
(6 Marks)
(b) What are data marts? What is the significance of creating them?
(4 Marks)
5.
(a) How will you enforce referential integrity constraints in Oracle? Explain with the help of one example.
(5 Marks)
(b) Create an object- oriented database using ODL for the following schema. Make suitable assumptions about attributes.
(5 Marks)
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6.
(a) How does an OLAP support query processing in dataware house?
(4 Marks)
(b) What do you understand by query processing and query optimization? What are query trees and query graphs? Explain with an example of your choice.
(6 Marks)
7.
(a) Explain MVD (multi valued dependency) and join dependency with the help of an example for each.
(5 Marks)
(b) How audit trails is done in database? How are they related to database security?
(5 Marks)
8.
(a) How does oracle manage database security?
(4 Marks)
(b) The organization called XYZ Pvt. Ltd. Company undertakes several kinds of projects. Each employee can move on one or more projects. Each project is undertaken on the request of a client. A client can request for several projects. Each project has only one client. A project can use a number of items from different manufacturers and an item may be used by several projects.
Before the delivery of items to a client, it is tested by a testing group in the organization. Draw E-R diagram and convert it into a relational schema. Also identity primary key in each relation.
(6 Marks
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