FINAL Examination Paper (COVER PAGE)

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1 Session : August 2011 FINAL Examination Paper (COVER PAGE) Programme : Bachelor of Business Information Technology (Hons) BBITI B.Sc. (Hons) Network and Mobile Computing BNMCI B.Sc. (Hons) in Internet And Multimedia Computing BIMCI Course : ICT 3202/ICT3203 : Database System Concepts ICT3263 : Data Management And Database Systems Date of Examination : 15 December 2011 Time : 08:00 10:00 Reading Time : Nil Duration : 2 Hours Special Instructions : This paper consists of SIX (6) questions. Answer any FOUR (4) questions in the answer booklet provided. All question carry equal marks. Materials permitted : Nil Materials provided : Nil Examiner(s) : Shubashini Rathina velu Moderator : Associate Professor Goh Poh Kim This paper consists of 7 printed pages, including the cover page.

2 INTI INTERNATIONAL UNIVERSITY ICT 3202/3203/3263(F) / Page 1 of 5 BACHELOR OF BUSINESS INFORMATION TECHNOLOGY (HONS) BBITI B.SC. (HONS) NETWORK AND MOBILE COMPUTING BNMCI B.SC. (HONS) IN INTERNET AND MULTIMEDIA COMPUTING BIMCI ICT 3202/ICT3203:DATABASE SYSTEM CONCEPTS ICT3263:DATA MANAGEMENT AND DATABASE SYSTEMS FINAL EXAMINATION :AUGUST 2011 SESSION This paper consists of SIX (6) questions. Answer any FOUR (4) questions in the answer booklet provided. All questions carry equal marks. Question 1 Wally s Wonderful World of Wallcoverings has hired you as a consultant to design a database management system for his chain of three stores that sell wallpaper and accessories.he would like to track sales, customers and employees. After initial meeting with Wally you have developed a list of business rules and specifications to begin the design of an E-R Model.The list of business rules are: Customers place orders through a branch A customer may place many orders A Customer does not always have to order through the same branch all the time Customers may have one or more accounts; although they may also have no accouts. The following information need to be recorded about accounts: Balance,last payment date,last payment amount, type A branch may have many customers A branch may sell all items or may only sell certain items Orders are composed of one or more items Items may be sold by one or more branches An item can be composed of multiple items: for example a dining room wall covering set may consists of wallpaper and borders Wally employs 54 employees Each employee may have one or more dependents Employees can have one or more skills Design an Entity Relationship diagram for this database. Specify primary keys and cardinality in your ERD. In cases where the above requirement specification is ambiguous, state clearly the assumptions which you made for justifying your modelling choices. (25 marks)

3 Question 2 ICT 3202/3203/3263(F) / Page 2 of 5 Design an appropriate set of normalized relation to represent the Material Supply Details. Decompose the following relation to First Normal Form (1NF), Second Normal Form (2NF) and Third Normal Form (3NF). Material relation: Material(Material Id,Material Name,Units Of Measure,Standard Cost,Vendor Id,Vendor Name,Tel No, ,Unit price,terms Code,Terms) (16 marks) (b) Based on Shipment relation below briefly explain THREE (3) different types of anomalies that occur in this unnormalized table. Shipment relation: Shipment (ShipmentID, ShipmentDate, Expected Arrival Date, Origin, destination, ship#,captianid, Captain Name, Item#, Type, description, weight, quantity) (9 marks) Question 3 Explain the terms below : (i) Weak entity (ii) Aggregation (b) (c) (d) Explain the differences among the ON UPDATE RESTRICT, ON UPDATE CASCADE, and ON UPDATE SET NULL clauses, and results of declaring ON DELETE CASCADE (8 marks) Discuss ANY (2) reasons to create a view using SQL and how a view can be used to reinforce data security. (6 marks) Differentiate between COUNT, COUNT DISTINCT, and COUNT (*) in SQL. (5 marks)

4 ICT 3202/3203/3263(F) / Page 3 of 5 Question 4 The following SIX (6) tables will be used to generate SQL statements for the following queries. Student (StudentId, Student Name, Id) Student Id Student Name Id Miley Cyrus Miley98@gmail.com Justin Bieber Justin11@gmail.com Selena Gomez Selena@yahoo.com Qualified (FacultyId, CourseId, DateQualified) Faculty Id Course Id Date Qualified 2143 CT / CS / KM3255 9/ CT1234 9/2008 Faculty (FacultyId, FacultyName) Faculty Id Faculty Name 2143 COMPUTER SCIENCE 3467 BUSINESS INTELLIGENCE 4756 INTERNATIONAL MARKETING Section (SectionNo, Semester, CourseId) Section No Semester Course Id CT CS KM3255 Course (CourseId, CourseName) Course Id CT 1234 CS 3454 KM 3255 Course Name System Analysis Database Concepts Knowledge Management Registration (StudentId, sectionno, Semester) Student Id Section No Semester

5 ICT 3202/3203/3263(F) / Page 4 of 5 (i) Display the semester which do not contain section (2 marks) (ii) Display the course ID and course name for all courses with an CT prefix. (iii) Which instructors are qualified to teach CS3454? (5 marks) (iv) (v) Is any instructor qualified to teach CS3454 and not qualified to teach CT1234? (4 marks) How many students are enrolled in section 2714 during semester I-2008? (vi) How many students are enrolled in ISM 3113 during semester I-2008? (5 marks) (b) Briefly explain the reasons to create a view using SQL and how a view can be used to reinforce data security. (6 marks) Question 5 (b) Describe one of the possible problems generated by concurrent access to the same data and illustrates how the problem can be resolved by using the locking mechanism. (10 marks) Briefly explain granularity and how does granularity affects a transaction in a database environment (10 marks) (c) Based on the diagram below, briefly explain how a system recovery could be implemented by means of checkpoint. T1 T2 T3 T4 T5 time (5 marks) Transactions of type checkpoint system failure

6 ICT 3202/3203/3263(F) / Page 5 of 5 Question 6 The following table shows data items that are locked and waiting for some transactions in a schedule. Transaction Locked Data Items Wait for Data items T1 D2 D1, D3 T2 D3, D10 D7, D8 T3 D8 D4, D5 T4 D7 D9 T5 D1, D5 D3 T6 D4, D9 D10 i) Produce a wait-for-graph (WFG) for the transaction above. ii) Based on the WFG produced, determine the deadlock that exists. iii) Suggest ONE (1) solution to solve the deadlock problem that occurred in part(ii) b) Identify and explain any THREE (3) computer-based counter measures that would protect a company s database. (9 marks) -The End- ICT 3202/3203/3263 (F)/JAN2011/SHUBASHINI/151111

Chapter 7 Advanced SQL. Objectives

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