Answer / mms zubeir

First of all, a class is a software entity to represent a
concept. If the entity exists in real world, then, we can
create object of the class which makes sense. This is
called as a concrete class.

For example, Lion, Dog, Car, Employee, etc.

An abstract class is a class which represents a concept,
the object of which is not available in the real world.
This is merely a concept alone. There are object in the
real world which resembles this concept.

For example, Animal, Vehicle, Person, etc.

Answer / manjunathtek

An Abstract Class is one in which the member function(s) at
the Base(Parent) Class are left undefined, but declared.
It's upto the Derived(child(ren)) Classes to Implement the
Functions declared in Base...


Ex:

Let us assume... As a father(Base Class), he has some Land
(Member Function), and he has not done any cultivation
(implementation) in it... As his Child(Derived Class), he
takes the Land(Member Function) from the Father(Base) and
does Agriculture(implementing the M.F. of Parent Class) in
the Child...

Concept of Inheritance...

Is it good enough!!!

Answer / ramakrishna yechuri

An Abstract class ia class which consists at least one
abstract method(in complete method).
Advantage is the user can implement the method body as per
his require ment.

ex: connect(){} ,I implement to conncect to oracle
database,u implement to conncet to sybase,my friend
implement this method to connect to oracle db. same connect
method acting in different forms (polymorphisim).
Note: Always Interfaces is better than Abstract class,becoz
Programming to Interface is better than programming to
classes.
To avoid dependency Injection problems.(spring).

Answer / m arunachalam

Abstract Class is to hide the internal details of data....
And real time examples are car. Because if u can start the
car, but how to be start didn't know.. where as here
function of start should be hide to the user.......

Answer / pradeep

An Abstract Class is one in which the member function(s) at
the Base(Parent) Class are left undefined, but declared.
It's upto the Derived(child(ren)) Classes to Implement the
Functions declared in Base...

The most real time example of abstract class and interface
is bulding a house
1)concrete methods are explained with completed house.
2)abstract classes are explained with completed house but a
little bit of work left
3)interfaces are explained with taking a building plan

what is Class in oops with example?

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Question In a class, there is a reference or pointer of an object of another class embedded, and the memory is either allocated or assigned to the new object created for this class. In the constructor, parameters are passed to initialize the data members and the embedded object reference to get inialized. What measures or design change should be advised for proper destruction and avioding memory leaks, getting pointers dangling for the embedded object memory allocation? Please suggest. Question Submitted By :: Sunil Kumar I also faced this Question!! Rank Answer Posted By Re: In a class, there is a reference or pointer of an object of another class embedded, and the memory is either allocated or assigned to the new object created for this class. In the constructor, parameters are passed to initialize the data members and the embedded object reference to get inialized. What measures or design change should be advised for proper destruction and avioding memory leaks, getting pointers dangling for the embedded object memory allocation? Please suggest. Answer # 1 use copy constructors 0 Shanthila There is something to be taken care in destructor, in copy constructor, suppose the memory is assigned to the embedded member object pointer with the parameter passed value, but if some other objects of different class also are pointing to this memory, then if some one deletes the object then this class member pointer object will become dangling, or if the object is not deleted properly then there will be memory leak. Please suggest the design change required to handle or avoid this situation

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can main method be overloaded...??? How..????

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What is the difference between declaration and definition?

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Can a destructor be called directly?

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Hi All, I am new to programming and want to know how can i write a code to take input of 2 numbers from user and swap it without using a temp variable?

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