THEORY EXAMINATION (SEM–IV) 2016-17 OBJECT ORIENTED PROGRAMMING WITH C++

Course: B.Tech (Computer Science / IT)
Subject Code: CS403
Subject Title: Object-Oriented Programming with C++
Exam Type: Theory
Duration: 3 Hours
Maximum Marks: 100

SECTION – A (10 × 2 = 20 Marks)

Short conceptual questions testing understanding of OOP fundamentals

SECTION – B (5 × 10 = 50 Marks)

Analytical and programming-based questions

(a) Copy Constructor

Used to initialize an object from another of the same class.

(b) Constructor Example – Area of Circle

#include <iostream> using namespace std; class Circle {  float r; public:  Circle(float radius) { r = radius; }  float area() { return 3.14 * r * r; } }; int main() {  Circle c1(5);  cout << "Area = " << c1.area(); }

(c) Function Overloading

Functions with the same name but different parameter lists.

(d) Operator Overloading

Overloading operators for user-defined types.
Example: Binary + operator

(e) OOP vs Procedural Programming

(f) Sorting Ten Integers (C++)

#include <iostream> using namespace std; int main() {  int a[10];  for(int i=0;i<10;i++) cin >> a[i];  sort(a, a+10);  for(int i=0;i<10;i++) cout << a[i] << " "; }

(g) Command Line Arguments – Factorial

#include <iostream> #include <cstdlib> using namespace std; int main(int argc, char* argv[]) {  int n = atoi(argv[1]);  int f=1; for(int i=1;i<=n;i++) f*=i;  cout << "Factorial = " << f; }

(h) Exception Handling

Handles runtime errors gracefully using try, catch, and throw.

SECTION – C (2 × 15 = 30 Marks)

Advanced C++ programming and conceptual application

Q3. (i) File Operations

File Handling in C++:

(ii) Class Template

template <class T> class Calculator { public:  T add(T a, T b) { return a + b; } }; int main() {  Calculator<int> c;  cout << c.add(4, 5); }

Q4. Inheritance (All Types with Example)

Q5. Short Notes

(i) Virtual Function
Used for runtime polymorphism — ensures that the derived class function is invoked via base class pointer.

(ii) Function Template
Generic function that works with multiple data types:

template <class T> T add(T a, T b) { return a + b; }

Summary

This Object-Oriented Programming with C++ (CS403) paper thoroughly tests:

ofstream fout("data.txt"); fout << "Hello World!"; fout.close(); ifstream fin("data.txt"); string s; fin >> s; cout << s; fin.close();

try {  int x = 5, y = 0;  if(y == 0) throw "Divide by zero!";  cout << x / y; } catch(const char* msg) {  cout << msg; }

class Complex {  int r, i; public:  Complex(int a, int b) { r = a; i = b; }  Complex operator+(Complex c) {    return Complex(r + c.r, i + c.i);  } };

void print(int a);   void print(double a);

class Demo {  int x; public:  Demo(int a) { x = a; }  Demo(Demo &d) { x = d.x; } // copy constructor };