OODBMS

1. Overview of Object Oriented Concepts

January-2004 [5]

4.

b)         What Is the difference between overloading and overriding methods?                               [5]

ans :-- Overloading - Two or more functions having same name but 

different siganture(i.e arguements or return types) for eg. 

we have a function named as area then

area();,float area();,area(float a,float b);,float area

(float a,float b);

Overriding - When a function of base class is re-defined in 

the derived class.for eg.

base class

{

area(float a,float b);

}

derive class

{

float area();

}

Overloading is compile time binding, where as overriding is

dynamic binding.....

 *    in overloading function name are same but signatures

(argument) are different .

while in overriding function name are as well as argument 

are same in drive class as in super class.

*  for overloading can be done in one class but 

for overriding there is necessary that at least two class 

should be present.

Overloading is compile time binding, where as overriding is

dynamic binding.

 overriding is done in the base class where the parent class

method is overridden by a method of the same signature.

Overloading is done in the same class on functions with

input parameters differing in number or type.

 It does not block superclass method it will override the 

super class method

The main difference between overloading and overriding is 

that in overloading we can use same function name with 

different parameters for multiple times for different tasks 

with on a class.

and overriding means we can use same name fiunction name

with same parameters of the base class in the derived class.

this is also called as reusability of code in the programme.

1. In overloading,there is a relation ship between methods 

available in the same class where as in overridding,there 

is relationship between a super class method and subclass 

method.

2. overloading doesn't block  inheritence from the 

superclass where as overridding blocks inheritence.

3. in overloading,seperate methods share the same name 

where as in overridding,subclass methods replaces the 

superclass.

4.overloading must have different method signatures where 

as overriding must have same signature.

January-2005 [14]

1.         Briefly explain the following:

a)         How does object-oriented programming style offer better reusability of code than modular programming?                                                                                                               [4]

d)         How is method-overriding different from method-overload?                                  [4]

c)         Why do we talk about message-dispatch in object-oriented systems rather than a function-call?                                                                                                               [4]

2.

a)         What distinguishes an ADT from a class?                                                                    [2]

July-2005 [4]

4.

c)         How a DBMS exploits encapsulation in implementing support for Abstract Data Types (ADTs).                                                                                                                 [4]

January-2006 [32]

1.         Briefly explain the following:

b)         Define classes, abstract classes and interfaces and explain their utility.                         [4]

e)         Distinguish between a function call and message dispatch.                                           [4]

f)          Distinguish between method overloading and method-overriding.                                     [4]

g)         Explain static and dynamic binding.                                                                             [4]

2.

c)         Define inheriting rule, subtype rule and method selection rule. Explain with examples.  [6]

3.

a)         Distinguish between procedural programming paradigm and object-oriented programming paradigm. What are the benefits of object-oriented programming over procedural programming?                                                                                                               [4]

b)         Explain static and dynamic polymorphism with suitable examples.                     [6]

July-2006 [8]

1.

a)         What is the purpose of inheritance? How does object oriented technique help produce flexible and extensible software?                                                                                [4]

b)         What are the advantages of polymorphism and dynamic binding?                       [4]

January-2007 [10]

1.

e)         How does DBMS exploit the encapsulation in implementing support of ADTs?                 [4]

4.

c)         How does a DBMS exploit encapsulation in implementing support for Abstract Data Types (ADTs)?                                                                                                          [6]

July-2007 [4]

1.

e)         Differentiate between Overriding and Overloading with suitable example.                          [4]

January-2008 [12]

1.

a)         Abstraction is a fundamental human capability that permits us to deal with complexity. Justify this statement.                                                                                                      [4]

c)         Give reasons why it is necessary to override a feature in object oriented programming.                                                                                                                                         [4]

2.

c)         Differentiate between overloading and overriding of methods in object oriented programming with suitable examples. Explain using C++ code.                                            [4]