UNIVERSITY OF BOLTON WESTERN INTERNATIONAL COLLEGE FZE BSC (HONS) COMPUTING SEMESTER ONE EXAMINATION 2015/2016 DATABASE THEORY AND PRACTICE

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1 OCD52 UNIVERSITY OF BOLTON WESTERN INTERNATIONAL COLLEGE FZE BSC (HONS) COMPUTING SEMESTER ONE EXAMINATION 2015/2016 DATABASE THEORY AND PRACTICE MODULE NO: CPU5002 Date: Wednesday, 13 January 2016 Time: 10:00 12:00 INSTRUCTIONS TO CANDIDATES: There are 6 questions on this paper. Answer 2 questions from each part. All questions carry equal marks.

2 Page 2 of 9 Western International College FZE Q1. PART A a. Refer to the following tables then answer the questions that follow. Table1: Publisher. pub_id pub_name address city State 736 New Age Books 4 1st Ave. Boston MA 877 Binnet&Barney 23 34rd St. Washington DC 944 Pearson 3, 5 th Ave. New York CA 1389 AlgoDumini 47 9th Ave. Berkeley CA Table2: Titles title_id title cat pub_id price 2091 is anger the enemy? psychology life without fear psychology alien Computing Show the data output produced when each of the following SQL queries are executed. i. SELECT pub_id, pub_name FROM publisher WHERE city LIKE 'B%' ; ii. SELECT cat, AVG(price) AS AveragePrice, SUM(price*0.2) AS TotalPrice FROM titles GROUP BY cat; iii. SELECT title, pub_name, price FROM titles, publisher WHERE publisher.pub_id=titles.pub_id and cat= psychology ; iv. SELECT title, cat, price FROM titles WHERE price>8.0 and tilte_id<2000; v. SELECT * FROM publisher WHERE state IN( MA, CA ); Q1 Continued over the page

3 Western International College FZE Page 3 of 9 Q1 continued vi. Demonstrate the purpose of the ORDER BY, GROUP BY and HAVING keywords in SQL? b. Explain how the three levels represented by the ANSI-SPARC Three-Level architecture model which provides a basis for the function of database management system along-with various schemas. (7 marks) Q2. a. An important concept in the theory of relational databases is that of a functional dependency. Explain what is meant by a functional dependency with an example. b. Identify the functional dependencies in the following table FD1 (A, B and C are the attributes of the table) Table3: FD. A B C a1 b1 c1 a2 b2 c3 a1 b1 c1 c. Demonstrate Normalization and first three normal forms in detail. (5 marks) Q2 Continued over the page

4 Western International College FZE Q2 continued Page 4 of 9 d. A company uses the table staff below to record details of staff. Each staff has up to three qualifications. Primary Key is (StaffID) Table4 : Staff. StaffID StaffName Qualifications. S01 Ibanga BSc, MSc, PhD S02 Kumar BSc, MSc S03 Grant BSc, PhD. i) Which Normal Form does the table4 (Staff) violate and why? ii) Show how you would normalize the Staff table with possible solutions. e. The table Student shown below stores details of students and the overall grade each student obtained in different modules. The Primary Key is (StudentID, ModuleID). Table5: Student. StudentID StudentName ModuleID ModuleName Grade S001 Smith M01 Java A S001 Smith M02 Databases B S002 Ford M01 Java B. i) Explain why student table is not in Second Normal Form (2NF)? Show how you would normalize the table with possible solutions for 2 NF. Please turn the page

5 Western International College FZE Page 5 of 9 Q3 a. With reference to a sample relation of your own, explain and discuss the following database terminology, including its function and any related concepts. i. Show your sample table with proper data. ii. Schema iii. Attribute iv. Relation v. RDBMS vi. Degree of relation vii. Null viii. Entity ix. Relationship x. Composite Attributes with example xi. Multivalued Attributes with example xii. Derived Attributes with example (2marks) b. Discuss various Data models with Examples (6 marks)

6 Western International College FZE Q4. Page 6 of 9 PART B Please turn the page a. Evaluate the benefits and issues of Views in databases with example. b. An Employee database with two tables is given below. Based on these tables write the queries and their corresponding outputs. Table6: works (employee-name, company-name, salary) employee-name company-name salary Aaron Jones Peter Patric Razul Thomas Ali First Bank Corporation Small Bank Corporation Small Bank Corporation First Bank Corporation First Bank Corporation Small Bank Corporation First Bank Corporation Table7:manages (employee-name, manager-name) employee-name manager-name Aaron Jones Peter Razul Ali Patric Thomas Thomas Patric Patric Q4 continued over the page Q4 continued

7 Page 7 of 9 Western International College FZE i. Create the works, manages tables and show the queries. ii. iii. iv. Insert the values for those tables with valid data. Display the employee name, manager name and company name combined together. Display the employee details that are having salary greater than 1000 AED. v. Give all employees of First Bank Corporation a 100 AED raise in their salary and vi. vii. update the database. Find the employees details working for Manager Patric. Delete all tuples in the works relation for employees of Small Bank Corporation. c. Analyze Data security in Database. Please turn the Page Q5.

8 Page 8 of 9 Western International College FZE a. Demonstrate how ER-data modelling helps in Database design process. Analyse the notations used on ER-diagrams with example. (8 marks) b. Draw an ER-diagram for the Hospital Management System with a set of patients and a set of medical doctors and Lab tests for patients with proper ERnotations. The patient consults Doctors and gets medication as well as referrals for laboratory tests. Tests need to be made for Patients in Laboratories and reports are generated. Identify the entities, relationships, attributes and primary keys. Patients should have their personal details, disease details and other required information. Doctors should include limited personal details and patient report details. Test should cover patient details, referred doctors, and results of tests. (13 marks) c. Analyze the stages of Database System Development Lifecycle. Q6. a. Analyze the SQL commands in detail. i. Elucidate DDL commands with example queries and sample tables. (5 marks) ii. Elucidate DML commands with example queries and sample tables with valid data. (6 marks) iii. Elucidate DCL commands with example queries. Q6 continued over the page Q6 continued

9 Page 9 of 9 Western International College FZE iv. Elucidate the various constraints in SQL with example. (5 marks) b. Demonstrate the forms and Report generation along with their steps to be followed in Oracle Application Express with sample interface. (6 marks) END OF QUESTIONS

BCS THE CHARTERED INSTITUTE FOR IT BCS HIGHER EDUCATION QUALIFICATIONS BCS Level 5 Diploma in IT DATABASE SYSTEMS

BCS THE CHARTERED INSTITUTE FOR IT BCS HIGHER EDUCATION QUALIFICATIONS BCS Level 5 Diploma in IT DATABASE SYSTEMS Tuesday 31 st March 2015 Morning Answer any FOUR questions out of SIX. All questions carry