(SEM V) THEORY EXAMINATION 2024-25 OBJECT ORIENTED SYSTEM DESIGN WITH C++

Subject Code: BCS054
Maximum Marks: 70
Time: 3 Hours
Paper ID: 310911

Question Paper Overview

SECTION A (2 × 7 = 14 Marks)

(Short conceptual questions)

a. Describe the significance of modeling in software engineering.
b. Define the conceptual model of UML.
c. Create a package diagram for a modular Library Management System.
d. Explain how use case diagrams help capture system requirements.
e. Describe the role of inheritance adjustment in design optimization.
f. Demonstrate the use of enumerations and constants in C++.
g. Explain the use of the this pointer in C++.

SECTION B (Attempt any three × 7 = 21 Marks)

a. Explain encapsulation and information hiding. How do these ensure system security and maintainability? Provide a UML example.
b. Draw an interaction diagram for a customer service chatbot system, including time-based interactions.
c. Explain the object-oriented analysis and design (OOAD) process using a ride-hailing app as a case study—from requirement gathering to design optimization.
d. Create a C++ program using a callback mechanism (via function pointers or lambda expressions).
e. Write a C++ program to implement operator overloading for matrix addition and subtraction with proper comments.

SECTION C (Attempt one part from each question × 7 = 35 Marks)

Q3

(a) Compare object-oriented modeling vs structured modeling using a banking system example.
OR
(b) Discuss the importance of architecture in O-O modeling. Design a UML architecture diagram for a cloud-based file-sharing system.

Q4

(a) Develop a UML class diagram for a Hospital Management System. Explain your design choices.
OR
(b) Explain polymorphism in collaboration diagrams. Design a collaboration diagram for an online learning platform showing polymorphism in course material access.

Q5

(a) Write a C++ program combining class, state, and interaction models to design a Smart Home System.
OR
(b) Compare and contrast SA/SD (Structured Analysis & Design) and Object-Oriented Analysis and Design (OOAD) using an online bookstore case study.

Q6

(a) Write a C++ program demonstrating inline functions and compare with macros in terms of memory and speed.
OR
(b) Create a C++ program using function overloading to calculate the volume of a cube, cylinder, and sphere.

Q7

(a) Explain static data members and functions. Write a program to track number of objects created for a class.
OR
(b) Develop a C++ program implementing hybrid inheritance and explain ambiguity resolution using virtual base classes.

 Key Topics for Revision

1. Significance of Modeling

Provides a visual representation of system structure and behavior.

Helps in requirement validation, communication, and early error detection.

2. Conceptual Model of UML

Three perspectives:

Structural (class, object, component, deployment diagrams).

Behavioral (use case, sequence, activity).

Interactional (communication, state).

3. Encapsulation and Information Hiding

Encapsulation: Bundling data with functions that operate on it.

Information hiding: Restricting direct access to object details.

Example UML: Private attributes, public methods.

4. UML Diagrams to Study

5. Key OOP Concepts

6. Inheritance Adjustment in Design

Fine-tuning inheritance hierarchies to remove redundancy.

Ensures efficient reusability and avoids diamond problems (via virtual base classes).

7. Callback Mechanism in C++

#include <iostream> using namespace std; void greetUser(void (*callback)()) {    cout << "Processing..." << endl;    callback(); } void welcome() { cout << "Hello from callback!" << endl; } int main() {    greetUser(welcome);    return 0; }

8. Operator Overloading Example

Matrix Matrix::operator+(Matrix m) {    Matrix temp;    for(int i=0;i<3;i++)        for(int j=0;j<3;j++)            temp.a[i][j] = a[i][j] + m.a[i][j];    return temp; }

9. Polymorphism Example

class Course { public:    virtual void showMaterial() = 0; }; class VideoCourse : public Course {    void showMaterial() override { cout << "Displaying Video..." << endl; } }; class TextCourse : public Course {    void showMaterial() override { cout << "Displaying Notes..." << endl; } };

10. Inline Functions vs Macros

11. Hybrid Inheritance

class A { public: void showA(){cout<<"A";} }; class B : virtual public A {}; class C : virtual public A {}; class D : public B, public C {};

Virtual inheritance avoids diamond ambiguity.

12. Static Data Members

class Counter {    static int count; public:    Counter() { count++; }    static void showCount() { cout << "Objects: " << count; } }; int Counter::count = 0;

13. OOAD vs SA/SD

14. Design Models Integration

Class Model: Defines structure.

State Model: Defines lifecycle states.

Interaction Model: Defines behavior between components.