In which scenario assignment operator and copy constructor used?Interview question?

[Anil K]

mainly in Telecomm domain

[vaibhav p]

Consider obj1=obj2
where obj1 & obj2 are the objects of same class
Here Assignment operator assigns the refernce of object obj2 to the memory location of obj1
Copy constructor is user defined hence in case of copy constructor it is supposed that it accept the reference to existing object retrive values of its fields then create new object initialise the fields of new object with retrived values & then return reference

[phoolpreet v]

assignment is default member wise copy.......
when this default behaviour is not required ..use copy constructor...to tune up copy procedure