CBSE Class 12 Computer Science Sample Paper 2014 Set 06

1. (a) What is difference between type casting and automatic type conversion? Explain with suitable example in C++. 

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

(i) setw ( ) (ii) malloc( )

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

#include<iostream.h> 

struct Display

{

int ROW, COL;

}

void ShowPoint(Display D)

{

cout<< D.ROW << D.COL << endl;

}

void main( )

(

Display Disp1 = ( 10, 20 );

Disp1.Showpoint( );

Display Disp2 = Disp1;

ROW + = 15;

Showpoint.Disp2;

}

(d) Give the output of the following program: 

#include<iostream.h>

void main( )

{

int *ptrArray[10];

int marks[ ] = {75, 68, 90, 34, 0, 10, 90, 65};

for ( int i = 0 ; marks[i] != 0 ; i++)

{

ptrArray[i] = &marks[i];

*(ptrArray[i]) += 5;

]

int index = 0;

while(index < i)

{

int k = *(ptrArray[index];

if (k > 60) 

cout<< k <<’,’;

index++;

}

}

(e) Give the output of the following program: 

#include<iostream.h>

void main( )

{

char *DATA = “ a HexaDecimal”

for( int ctr = 0 ; ctr < strlen(DATA) ; ctr ++)

if( islower (DATA[ctr] ))

DATA[ctr] = toupper (DATA[ctr]);

else

if (isupper (DATA[ctr] ))

if (ctr % 2 != 0)

DATA[ctr] = tolower ( DATA [ ctr ‒ 1 ];

else

DATA [ctr ] ‒ 2;

cout<< DATA ;

}

(f) Study the following program and select the possible output from it: 

#include<iostream.h>

#include<stdlib.h>

const int BIG = 3 ;

void main( )

{

randomize( );

int Digit ;

Digit = 90 + random (BIG );

for (int K = DIGIT ; K >= 90 ; K ‒ ‒)

cout<< K << “$”;

}

(i) 93$93$92$91$90$

(ii) 91$90$

(iii) 90$91$92$

(iv) 90$92$

2. (a) Differentiate between Function Overloading and Default Arguments with suitable example. 

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

class Teacher

{

char Subject[30];

int Salary;

public: 

Teacher( ) // Function 1

{

strcpy (Subject, “ Economics”);

Salary = 15000;

}

Teacher ( char T[ ]) // Function 2

{

strcpy (Subject, T);

Salary = 15000;

}

Teacher ( int S) // Function 3

{

strcpy (Subject, “Economics);

Salary = S;

}

Teacher (chat T[ ], int S) // Function 4

{

strcpy (Subject, T);

Salary = S;

}

}

(i) Which feature of object oriented programming is demonstrated using Function1, Function2, Function3 and Function4?

(ii) Write statement in C++ that would call Function 2 and Function 4 of class Teacher.

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