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Explain the concept of abstracion and encapsulation with
one example. What is the difference between them?
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Answer Posted / aarti ashar
(1)Abstraction:
To implement real world entity into program. Class uses the
concept of abstraction.
->abstraction is a process of mimicking a behavior.
->Simplifying complex reality by modeling classes
appropriate to problem.
->Abstraction is a process that involves identifying the
crucial behavior of an object and eliminating irrelevant
and tedious details.
(2)Encapsulation:
->Binding the data and code to access that data.
Encapsulation only refers to a container which has a data
and its related functions in it.
->When an objects state and behavior are kept together they
are encapsulated. The data and the methods that manipulated
that data are stored together in cohesive unit.
| Is This Answer Correct ? | 3 Yes | 4 No |
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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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