CBSE Class 11 Computer Science Sample Paper Set 25

Q1) a) What is significance of My Computer ? 

      b) Explain different types of operating systems . 

      c) What is an Operating System? Explain its any two functions 

      d) How is a compiler different from interpreter? 

     e) Convert

            (i) ( 10.10)10= ( ? )2

            (ii) (101011.1110)2 =( ? )10 

Q2)a) What do you mean by run time error? 

     b) what is the deference between if and if – else statement 

     c) Mention and explain briefly any three characteristics of a good program 

     d) How can you give a single line and multiline comments in C++ explain with suitable examples 

  e) what do you mean by header files? What is the difference between #include <iostream.h> and #include”iostream.h” 

Q3)a) Classify the following variable names of c++ into valid and invalid category 

     (i) 1no         (ii) num 1      (iii) num        (iv) num1num      (v) num+1     (vi) num.

     b) Give output of following code. 

     #include<iostream.h>

       int m=5; void check();

       void main( )

           { int m=20;

              {

                  int m=10*::m;

                  cout<<"m="<<m<<"::m="<<::m<<endl;

              } check();

                cout<<"m="<<m<<"::m="<<::m<<endl;

                check(); cout<<"::m="<<::m<<"m="<<m<<endl;

           }

              void check()

                 { ++m;

                 }

     c) What will be result of following statements if a=5 , b=5 initially 

     (i) ++a<=5       (ii) b++<=5

     d)Name the header file(s) that shall be needed for successful compilation of the following C++ code. 

          void main( )

             {

                    char name[40];

                    strcpy(name,”India”);

                    puts(name); }

     e) Explain conditional operator (?) with example in c++ . 

     f) What is difference between ‘/’ and ‘%’ operators in c++ ? explain with a example

Q4)a) What do you mean by function prototype in C++ 

     b) Explain Break and Continue statement in C++ with example. 

     c) Find syntax error(s) if any in following program ( Assume all header files are present) 

         main<>

            { int c;

              switch( c );

              case 1.5: { cout<<” India is great\n”;

            } break;

        ‘case’ 2: { cout<<” hello\n”;

              } break;

              } // end of main

              } // end of switch

     d) How will you declare and define 

     i)Array named mark with 10 integer values

     ii)array named avg with 8 float values

     e) Convert following while loop to for loop 

              int x=0;

              while(x<=100)

                { cout<<” the value of x is \n”<<x;

                  cout<<”done \n”;

                      x+=2;

                }

      f ) Define token ? 

     g) What is the difference between call by value and call by reference explain with suitable example 

     h)Find the output of the following program; 

Please refer to attached file for CBSE Class 11 Computer Science  Sample Paper Set Y