GTU Database Management System Question Paper Dec 2010

GTU Database Management System Question Paper Dec 2010

GUJARAT TECHNOLOGICAL UNIVERSITY

B.E. Sem-III Regular / Remedial

Examination December 2010

Subject code: 130703

Subject Name: Database Management System

                                                                                                                                Total Marks: 70

Instructions:

  1. Attempt all questions.
  2. Make suitable assumptions wherever necessary.
  3. Figures to the right indicate full marks.

Q.1 (a) What is data independence ? Explain the difference between physical and logical                                  05 data independence with example.

(b)        List the ACID properties. Explain the usefulness of each                                                 05

(c)        What are the responsibilities of a DBA ?                                                                          04

Q.2 (a) Explain following Term with suitable example                                                                        06

(1) Primary Key (2) Candidate Key (3) Super Key (4) On delete cascade

(b) Write down the query for the following table where primary keys are underlined. 08

Person(ss#, name, address)

Car(license, year, model)

Accident(date, driver, damage-amount)

Owns(ss#, license)

Log(license, date, driver)

(1) find the total number of people whose cars were involved in accidents in 2009.

(2) Find the number of accidents in which the cars belonging to “S.Sudarshan”

(3) Add a new customer to the database.

(4) Add a new accident recorded for the Santro belonging to “KORTH”

OR

(b) Consider the employee data. Give an expression in SQL for the following query : 08 Employee(employee-name, street,city)

Works(employee-name, company-name,salary)

Company(company-name, city)

Manages(employee-name, manager-name)

(1) find the name of all employees who work for State Bank.

(2) Find the names and cities of residence of all employees who work for State Bank.

(3)   Find all employee in the database who do not work for State Bank.

(4) Find all employee in the database who earn more than every employee of UCO Bank.

Q.3 (a) Draw E – R Diagram for the School Management System.                                                       07

(b) Explain 1NF, 2NF, 3NF and BCNF.                                                                                    07

OR

Q.3 (a) Draw E – R Diagram for Library Management System.                                                            07

(b) Consider a relation R with five attribute A,B,C,D,E having following dependencies 07 : A B, BCE and EDA

a)    List  all Keys for R

b)  In which normal form table is, justify your answer.

Q.4 (a) What is join ? Explain various type of joins with example

07

(b) Write Note on Cursor and its typesOR

07

Q.4 (a) What is deadlock? When it is occurs and how to avoid it ?

07

(b) Explain Trigger with example.

07

Q.5 (a) Explain Strict two phase locking with it’s advantage and disadvantages.

07

(b) Explain DDL,DML,DCL

05

(c) Define Discretionary access controlOR

02

Q.5 (a) Explain linear search and binary search algorithm for selection operation.

07

(b) Write with example various built in string functions.

05

(c) Describe Data Encryption.

02

 

 

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