Download CBSE Computer Science Sample Paper  Class XII (12th) 2009

Sample Paper – 2009

Class – XII

COMPUTER SCIENCE

(Set-1)

Time:3HRS                                          M.M    70

 

  General Instruction:

      (i) All Questions are compulsory

      (ii) Programming Language : C++

 

Q1 a) Reusability of classes is one of the major properties of OOP. How it is implemented             2

      b) Name the header file(s) required for the given built-in functions  of C++ library                  1

                 i) abc()       ii)printf()

     c)  Rewrite  the given snippet after correcting the error(s) if any. Underline the each

 correction(s)             2

                 #include<iostream.h>

                class Employee

                 {

                      int no;

                      class date

                        {

                              int dd,mm,yy;

                               public:

                                  void print_date()

{ cout<<dd<<mm<<yy;}

                           };      

                        date DOB;

                         public :

                               date DOJ;

                              void prin()

                                {

                                    print_date();

                                       cout<<DOB.dd<<DOB.mm<<DOB.yy;

                                }

                 };

               void main()

                  {

                           Employee ob1;

                            date ob2;

                   }

                             

    d) What will be the output of the following program                                                                     3         

         #include<iostream.h>

        void main()

          {

                static int arr[]={0,1,2,3,4};

                int *p[] = { arr,arr+1,arr+2,arr+3,arr+4};

                int **ptr=p;

                ptr++;

                cout<<ptr-p<<*ptr-arr<<**ptr<<endl;

              *ptr++;  

                 cout<<ptr-p<<*ptr-arr<<**ptr<<endl;

             *++ptr;

                 cout<<ptr-p<<*ptr-arr<<**ptr<<endl;

                ++*ptr;

                 cout<<ptr-p<<*ptr-arr<<**ptr<<endl;

          } 

 

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