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College : Psg Polytechnic College
Degree : DCS (Diploma in Computer Science)
Semester : IV
Subject : Z12402 Database Management System
Document Type : Model Question Paper
Website : psgpolytech.ac.in

Download Model/ Sample Question Papers : https://www.pdfquestion.in/uploads/psgpolytech.ac.in/6214-Z12402.pdf

Psg Polytechnic Management Question Paper

PSG POLYTECHNIC COLLEGE, COIMBATORE – 641 004
DIPLOMA ODD SEMESTER EXAMINATIONS – NOV 2012

Related / Similar Question Paper :
PSG College DCS C++ Programming Question Paper

Instructions

1. Group A and Group B questions should be answered in the Main Answer book.
2. Answer any TEN questions in Group A. Each question carries two marks.
3. Answer ALL questions either (a) subdivision or (b) subdivision in Group B. Each question carries 14 marks.

Z12402 Database Management System
MODEL QUESTION PAPER
Time : 3 Hours Max.Marks: 100
Group – A Marks : 10 x 3 = 30
1. How do you communicate with an RDBMS-
2. Differentiate Hierarchical and Network model.

3. What are the various ways in which database backup and recovery can be implemented.
4. Distinguish between connectivity and cardinality. How will you represent them in an ER diagram?

5. Define primary key. Give an example.
6. What is Normalization? Why do we need normalization?
7. What is the use LIKE operator? Give an example.

8. State the difference between a “where” clause and a “having” clause.
9. How do you list the employee names ending with a ‘s’ from the employee table?
10. What is cursor? Give an example.

11. Write the syntax for creating a stored procedure.
12. How do you use %NOTFOUND and %ROWCOUNT cursor attributes?
13. When will you use the commit and rollback statements?

14. What is transaction? Give any two examples for user defined transactions.
15. What are the different ways in which the transaction ends?

Group– B :
Marks : 5 x 14 = 70
16. a) (i) Describe the main characteristics of the database approach in contrast with the file oriented approach. (5)
(ii) With a neat diagram, explain the architecture of a database. (9)
(OR)

b) (i) Describe various components of DBMS environment and discuss how they relate to each other. (5)
(ii) Which database model is efficient to handle one to many relationships? Explain with an example. (9)

17. a) Consider the employee table which contains the following information.
Emp_id, name, salary, dob, dept_code, dept_name and description.
Apply 1NF and 2NF for the employee table.
(OR)
Roll No. No. of Pages :
PSG POLYTECHNIC COLLEGE, COIMBATORE – 641 004
DIPLOMA ODD SEMESTER EXAMINATIONS – NOV 2012

b) Construct an ER diagram for a company which sells and services cars. The company keeps information about customers who purchase one or more cars, the sales person who is responsible for the sale and service details for each car is maintained.

18. a) (i) Write PL/SQL block to find the sum of n numbers. (5)
(ii) Explain any two set operations with an example. (9)
(OR)
b) How will you create and use views? Explain it with an example.

19. a) (i) Describe exception handling with example. (5)
(ii) Discuss about the triggers. How do triggers offer a powerful mechanism for dealing with the changes to data base with suitable example? (9)
(OR)

b) Create a stored procedure “proc_order table” to update qty_on_hand in the product_master table and also to update order_status in the sales_order tables. Consider the following tables.
product_master table
1) Product no 2) description 3) unit measure 4) quantity on hand 5) cost price 6) sell price Sales_order table
1) Order no 2) client no 3) order date 4) qty 5) order status

20. a) What are transaction properties? Explain with an example.
(OR)
b) Explain the state of a transaction with the help of the state diagram.

Data Structures

Z12302 Semester : 3
Model Question Paper
Time : 3 Hours
Max.Marks : 75
Group – A Marks : 10 x 2 = 20
1. Define data structures.
2. What is a non primitive data structure- Give an example.
3. Differentiate between linear and non linear data structures.

4. What is the use of pointer head in the linked list-
5. State any two differences between static and dynamic memory allocation.
6. How do you insert an element in an array-

7. What do you mean by stack overflow-
8. What are the limitations of simple queue-
9. Convert the expression (P+Q)* C into postfix and show the contents of stack after every step in tabular form.