Download DU (University of Delhi) B-Tech 1st Semester 7796 Programming Fundamentals Question Paper

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Roll No.

S. No. of Question Paper : 7796

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Unique Paper Code : 2341101 F-1

Name of the Paper : Programming Fundamentals [DC-1.1]

Name of the Course : B.Tech. in Computer Science

Semester : 1

Duration : 3 Hours Maximum Marks : 75

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(Write your Roll No. on the top immediately on receipt of this question paper.)

There are two parts of the question paper Part I and Part II. Part I has one question which is compulsory. From Part II attempt any four out of six questions.

Part I

Question No. 1 is compulsory.

1. (a) Determine which of the following are valid identifiers. If invalid, state reason : 2
   1. recordl

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   2. return
   3. name and address
   4. file-3
2. (b) If originally x = 3 and y = 5, 2
   1. What is the value of the expression x++ + ++y ?

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   2. What are the values of x and y after the evaluation of the above expression ?
3. (c) Give the output of the following : 2
   1. int il = 123;
      float fl = 23.5, f2 = 12.09;
      cout < cout.setf(ios: :fixed, ios: :floatfield);
      

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      cout< cout.setf(ios: :left, ios: :adjustfield;
      cout< cout<<"%";
      cout.setf(ios: :right, ios: :adjustfield);
      cout<

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4. (ii) int list [6] = {0}; 3
   for (int i = 0; i < 3; i++)
   list [2*i+1] = i + 2;
   for (i = 0; i < 6; i ++)
   cout <
5. (iii) int k = 20; 2
   

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   (k != (k = - k)) ? cout << "true" : cout <<"false";
6. (iv) class A 3
   {
   public:
   A()
   

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   {cout<<"class A constructor";}.
   ~A()
   { cout <<" class A destructor";}
   };
7. class B
   

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   {
   };
   public:
   B()
   { cout <<"class B constructor";}
   

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   ~B()
   {cout<<"class B destructor";}
   class C: public B, public A
   {
   };
   

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   public:
   C()
   {cout<<"class C constructor";}
   ~C()
   {cout<<"class C destructor";}
   

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   int main ()
   {
   C myc;
   return 0;
   }

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8. (d) Give the output of line 1, line 2 and line 3 : 3
   class A
   {
   int a;
   };
   

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   protected:
   int b;
   public:
   A () {a = 10; b = 20;}
   int c;
   

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   void display ()
   { cout <<"Hello Class A";}
   class B: public A
   {
   public:
   

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   void display ()
   { cout <<"Hello Class B";}
9. void show ()
   {
   cout < cout < }
   

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   };
   int main()
   {
   b myb;
   myb.show();
   

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   myb.display(); //line 3
   return 0;
   }
10. (e) Write a program that prints the following pattern : 3
    *
    

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    * *
    * * *
    * * * *
    * * * * *
    Input to the program is the number of lines.

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11. (f) Change the following do while loop to while loop : 3
    int x = 0;
    do
    {
    cout << x ++ < } while (x < 100);

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12. (g) Find the error in the following function definition : 1
    1. void func (int x, int y)
       {
       int z;
       return z;
       }.

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    2. obj & operator + (obj. ob) 2
       {
       objk;
       k.val = val + ob.val;
       return k;
       

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       }
13. (h) What would be printed in the following ? 3
    1. bool b;
       string s1 ("Hello");
       string s2 ("Hello!");
       

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       b = (sl == s2);
       cout <
    2. string sl ("Hello");
       string s2 ("Hello!");
       int i = firstranker.compare(0,3,s2,0,3);
       cout<
    3. string s1 ("Good Morning");
       

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       s1.replace(5, 7, "Evening",0,7);
       cout<

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14. (i) What is the role of the generic exception handler, catch(....). Give an example. 3
15. (j) What do the following file handling keywords do ? Explain each with syntax : 3
    ifstream, ofstream, fstream.

Part II

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Attempt any four questions from this part. All questions carry equal marks.

1. (a) Given a class employee, given the code for the following :
   1. Create an array of 5 employee objects. 2
   2. Give the prototype of non-member function display to which the array is passed. 2
      Function display returns void.

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2. (b) Input an array A containing 10 integers. Write a function to reverse the elements of array A so that last element becomes first, second from the last becomes the second and so on. 4
3. (c) Write a function called smallest that, given three integers, returns the smallest one. 2
4. Create a class fraction containing data members num and deno (num denotes numerator and deno denotes denominator) and appropriate methods mentioned below : 3
   1. A default constructor to accept data members. 2
5. (b) The copy constructor. 2

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6. (c) A member function to add two objects of fraction using operator overloading. 3
7. (a) Create a file containing roll no., name, marks in 3 subjects of 5 students. Create another file using this file which contains the data of those students whose average marks >=40. Print the contents of both the files. 5
8. (b) Write a program to find the average of n integer numbers. Read the value of n.
   If n happens to be zero, throw a user defined exception with message "input error".
   Also catch the exception using suitable try and catch block. 5

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9. (a)
   1. Write a base class base, with a pure virtual function print. 2
   2. Derive a class derived with public inheritance. Override print. 2
   3. Overload the print method in the derived class with a single integer parameter to print the parameter. 1
10. (b)
    1. What is run time polymorphism? How is it achieved ? 2

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    2. Differentiate between static binding and dynamic binding. 3
11. (a) Explain the difference between pass-by-value and pass-by-reference techniques to pass the data to function. Also give a suitable example of each. 5
12. (b) Differentiate between constants and variables. Give example. 3
13. (c) Write appropriate declarations for the following : 2
    1. unsigned integer variable: custno

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    2. double precision variable: c = 0.3333333
14. (a)
    1. Create an array of 12 strings to store the 12 months in a year. 2
    2. Use string function(s) to create a string that appends the first 3 months. 1
    3. For the last 4 months search and report the position of substring "ber" using string class function. 2

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15. (b) Determine the value of the following expressions when i=8, j=5, x=0.005, y=-0.01, c='c' 3
    1. (3*i - 2*j)%(2*j - i)
    2. !(c==99)
    3. (x>y)&&(i>0)||(j<5)

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16. (c) Give the output of the following code : 2
    void fun(int& a, int & b, int c)
    {
    b=a+2;
    cout<<"in function a = "<< a <<" b = "< }
    

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    int main ()
    {
    int x;
    X = 5;
    fun (x, x, x);
    

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    cout <<"in main"< return 0;
    }

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