RGPV BHOPAL,MP
M.C.A.(3RD Semester) Examination
OBJECT ORIENTED METHODOLOGY & C++[MCA-303]
Time: 3 Hrs Max Marks: 100 Min: 40Note :Attempts All questions.All Question carry equal marks.
Q.1.(a) Compare abstraction and encapsulation.Give advantages and disadvantages of polymorphism in an object-oriented system. What types of relationship can be present between two classes, say A and B ?
(b) Write a class to keep track of accounts in a bank. Also provide suitable constructors.?
(c) Compare the following :
(i) Object-oriented and object base language
(ii) Default constructor and parametrized constructor and copy constructor.
Q.2.(a) What is container-ship or delegation ? How does it differ from inheritance?
(b) Write a program to create a class time containing date,hours, minutes and seconds.
Overload binary '+' operator such that you can add two objects of the class time with the
range of minutes and seconds.Display the added object. ?
(c) What are the various forms of inheritance?Explain with examples with their applicability.?
Q.3.(a) Differentiate between the following :
(i) Interface and abstract class
(ii) Early and late binding
(iii) Private, public and protected access modifiers
(b) When are virtual functions created for implementing late binding ? What basic rules should be observed ? When do we make a virtual function "pure" ?
(c) What is a friend function ? When and how do we declare a class of a friend class ? A friend function cannot be used to overload the assignment operator. Explain why.?
Q.4.(a) Write a program in C++ which use the 'try', 'catch' and 'throw' functions.?
(b) How can you create insertors and extractors of your own ? Write down the syntax of both.
(c) Compare the following :
(i) Formatted I/O vs Standard I/O system
(ii) Files vs Manipulators
Q.5.(a) Draw an instance diagram for two squares with a common side under the following conditions :
(i) A point belongs to one or more polygons.
(ii) A point belongs to almost two polygons.
(b) Differentiate among creational, structural and behavioral pattern.
(c) Perform OOA and OOD for examination results display system of a University on the following points :
(i) Identify actors and their responsibilities
(ii) Draw detailed use case diagram
(iii)Draw design class diagram
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