Subject : DBMS

Question BankUnit I and II1. Write short note on

a. Need of DBMS

b. External data model

c. Internal data model

d. Conceptual data model

2.Explain the following data model. Hence write their advantages and disadvantages

a. Network model

b. Hierarchical model

c. ER model

d. Relational model

e. Object oriented model

3.What do you mean by business rules . explain

4.Explain need or importance of of data models

5.Define the following : a. Database

b. DBMSc. Data Modeld. .Data Abstraction

6.Explain the various level of database architecture.

7.Describe data independence in detail

8.Write down the advantages of DBMS over file system

9.Explain the need of database concept.10.What are the different types of database users.Unit IIIDraw ER diagram for some database For eg university database

What is normalization ? Explain 1NF, 2NF, 3NF ,4NF,BCNF with suitable example.Write note on

i) Super and Sub classes

ii) Type inheritence

iii) Weak entity set.

iv) Specialization and generalization

v) Functional Dependency

Define the following i) entity ii)attribute iii)relationship

What is attribute.with an example explain the different types of attributes

Define constraints.Hence explain the mapping constraints in detail.

State and explain the Codds 12 rulesHow to determine whether a DBMS is relational and to what extent it is relational.Explain

With an example explain the following key

i) Primary key

ii) Super key

iii) Candidate key

iv) Foreign key

Discuss the different types of Data Anomalies.

Unit IVWith an example explain Projection and Selection operator.

Explain the various SET operators in relational algebra

With an example discuss the concept of JOIN operation in relational algebra

Write note on(relationl algebra)i) Natural join

ii) Inner join

iii) Outer join

iv) Grouping operator

v) Rename operator

Question will asked to write relational queries

Write Relational algebra queries for the following problem

Compare relation calculus with relational algebra.Explain the various operators in relational calculus

Unit VState the importance of Constraints

What are various types of integrity constraints? Explain by giving examples.

Explain primary key and foreign key with examole

With an example explain the check constraints.

What is views explain.

Explain the advantages and disadvantages of using views.

Write a short note on updates of views.

Explain the difference between table and view.

Explain the aggregate function with example

With an example explain the following commands

i) Create ii) drop iii) alter iv) update v) select vi) group vii) having viii) order by

What are joins? What are different types ofjoins give example of each.

Explain the different types of set operation in SQLWhat is subquery . explain with example..

Unit VIExplain ACID properties with example

Briefly explain the state transition diagrams

What do you understand by concurrent execution of transaction.Explain conflict serializability and view serializability

Explain the various problems caused by concurrent execution..

Write note on : commit and rollback

Write note on : shared lock , Exclusive lockDescribe the working of locking protocol.

Describe the modified version of Two-phase locking protocol

What is deadlock? What are the condition necessary for it.

Discuss the various types of deadlock recovery schemes.

Explain the time stamp ordering protocol and Thomas write rule.