CBSE Class 12 Computer Science Sample Paper 2014 Set D

1. (a) Differentiate between run time error and syntax error. Give one example of each. 

(b) Name the header files for which the following function belongs: 

 (i) isalnum ( ) (ii) getxy( )

(c) Rewrite the following program after removing all syntactical error(s), if any. Underline each correction:

#include<iostream.h> 

int Digit 6;

void main( )

{

Number = 18;

for (int Cv = 1 : Cv <= 6 ; Cv ++, Number = 3)

if (Number % Digit = 0)

cout<< Number / Digit ;

cout>>endl;

else

cout<< Number + Digit << endl;

}

(d) Give the output of the following program: 

#include<iostream.h>

void main( )

{

int Values [ ] = {2, 4, 8, 10};

int *ptr = Values;

for (int C = 0 ; C < 3 ; C ++)

{

cout<< *ptr << “@”;

ptr ++;

}

cout << endl;

for ( C = 0 ; C <4 ; C++)

{

(*ptr) * = 3;

‒ ‒ptr;

}

for (C = 0; C< 4 ; C++)

cout<< Values [C ] << “%” ;

cout<< endl;

}

(e) Give the output of the following program: 

#include<iostream.h>

void ReCode ( char Text[ ], int Num );

void main ( )

{ char Note [ ] = “Butterfly”;

Recode (Note, 2);

cout << Note <<endl;

}

void ReCode (char Text [ ], int Num)

{ for ( int K = 0 ; Text [K] !=’\0’ ; K++)

if ( K % 2 == 0)

Text [K] = Text [K] ‒ Num;

else if ( islower (Text[K] ))

Text [K] = toupper ( Text [K] )

else

Text[K] = Text[K] + Num;

}

(f) Study the following program and select the correct option(s) out of the four choices given below as the possible set of such numbers generated from the program code. Justify your answer. 

#include<iostream.h> 

#include<stdlib.h>

const int MIN = 25 ;

void main( )

{

randomize ( );

int SCORE = 10 , Num;

for (int i = 1 ; i <= 4 ; i ++ )

{

Num = MIN + random (SCORE );

cout << Num << “:”;

SCORE ‒ ‒;

}

}

(i) 34:31:30:33:

(ii) 29:33:30:31:

(iii) 34:31:30:31:

(iv) 34:31:29:33:

2. (a) Explain Constructor overloading with a suitable example in C++. 

(b) Answer the questions (i) to (ii) after going through the following class: 

class Product

{

char P_Type[20];

char P_Name [20];

int Weight;

float Rate;

Product( ) // Function 1

{

strcpy (P_Type, “Steel”);

strcpy (P_Name, Sheet”);

Weight = 3500;

Rate = 500;

public:

void Display ( ) // Function 2

{

cout<< P_Type <<”-“<<P_Name << “:”<< Weight << “@ “<< Rate << endl;

}

};

void main( )

{

Product P; // Statement 1

P.Display ( ); // Statement 2

}

(i) Will Statement 1 initialize all the data members for objects P with the values given in the Function 1? (Yes or No). Justify your answer suggesting the corrections to be made in the above code.

(ii) What shall be the possible output when the program gets executed? (Assuming if required –the suggested corrections are made in the program).

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