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1 (a)
Define Data Independence and explain types of data Independence
5 M
1 (b)
List all Function dependencies satisfied by the relation
| A | B | C |
| a1 a1 a2 a2 | b1 b1 b1 b1 | c1 c2 c1 c3 |
5 M
1 (c)
Explain Generalization and Specialization.
5 M
1 (d)
Explain the steps in query processing.
5 M
2 (a)
Explain the steps of an algorithm for ER to relational mapping.
10 M
2 (b)
Explain different Integrity constraints.
10 M
3 (a)
Draw an E-R diagram for a university database consisting of 4 entities.
(i) Student
(ii) Department
(iii) Class
(iv) Faculty and convert it to tables.
A student has a unique id, the student can enroll for multiple classes and has at most one major Faculty must belong to department and faculty can take multiple classes. Every student will get a grade for the class he/she was enrolled.
(i) Student
(ii) Department
(iii) Class
(iv) Faculty and convert it to tables.
10 M
3 (b)
Draw and Explain Database system structure.
10 M
4 (a)
Consider the following employee database.
Employee (empname, street, city, date_of_joining)
Works (empname, company_name, salary)
Company (company_name, city)
Manages (empname, manager_name).
Write SQL queries for the following statements :-
(i) Modify the database so that 'John' now lives in 'Mumbai'
(ii) Give all employee of 'ABC Corporation' a 10% raise.
(iii) LIst all employee who live in the same cities as their managers.
(iv) Find all employees who more that avearage salary of all employees of their company.
Employee (empname, street, city, date_of_joining)
Works (empname, company_name, salary)
Company (company_name, city)
Manages (empname, manager_name).
Write SQL queries for the following statements :-
(i) Modify the database so that 'John' now lives in 'Mumbai'
(ii) Give all employee of 'ABC Corporation' a 10% raise.
(iii) LIst all employee who live in the same cities as their managers.
(iv) Find all employees who more that avearage salary of all employees of their company.
10 M
4 (b)
Explain Time-stamp ordering protocol.
10 M
5 (a)
Consider a dependency diagram of relation R and normalization it up to third normal form.
10 M
5 (b)
Explain log-based Recovery
10 M
6 (a)
Draw a query tree for the following SQL query.
Select P.Pnumber, P.Dnum, E.Lname, E.Address, E.Bdate.
From Project as P, Department as D, Employee as E.
Where P.Dnum=D.Dnumber
AND D.Mgr_ssn=E.ssn
AND P.Plocation='Chennai'.
Select P.Pnumber, P.Dnum, E.Lname, E.Address, E.Bdate.
From Project as P, Department as D, Employee as E.
Where P.Dnum=D.Dnumber
AND D.Mgr_ssn=E.ssn
AND P.Plocation='Chennai'.
10 M
6 (b)
Explian following relational algebra operations with proper examples.
(i) Project
(ii) Left outer join
(iii) Division
(iv) Rename
(v) Natural join
(i) Project
(ii) Left outer join
(iii) Division
(iv) Rename
(v) Natural join
10 M
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