CBSE Class 12 Computer Science Sample Paper 2014 Set E

a) What is the difference between Auto variables and Static variables? Give an example to illustrate the same. 

b) Name the header files for the following functions 

(1) cgets

(2) floor

(3) isalpha

(4) gets

c)In the following C++ program what is expected value of myscore from options (i) to (iv) given below. 

#include<stdlib.h>

#include<iostream.h>

void main( )

{

randomize( );

int score[]={ 25, 20,34,56, 72, 63};

int myscore=score[2+random(2)];

cout<<myscore<<endl;

}

i) 25 ii) 34 iii) 20 iv) None of these

d)Give the output of thefollowing program (Assuming all required header files are included in the program ). 

void swap(char &c1,char &c2)

{

char temp;

temp=c1;

c1=c2;

c2=temp;

}

void update(char *str)

{ int k,j,l1,l2;

l1 = (strlen(str)+1)/2;

l2=strlen(str);

for(k=0,j=l1-1;k<j;k++,j--)

{

if(islower(str[k]))

swap(str[k],str[j]);

}

for(k=l1,j=l2-1;k<j;k++,j--)

{

if(isupper(str[k]))

swap(str[k],str[j]);

}

}

void main()

{

char data[100]={"gOoDLUck"};

cout<<"Original Data : "<<data<<endl;

update(data);

cout<<"Updated Data "<<data;

}

e) Give the output of the following program segment : 

void main()

{ int x[] = { 11,22, 33, 55, 112};

int *p = x ;

while(*p<110)

{ if(*p%3 !=0)

*p=*p+1 ;

else

*p=*p+2 ;

P++ ;

}

for( int i=4 ;i>=1 ;i--)

{ cout<<x[i]<< ‘*’ ;

if(i%3= =0 )

cout<<endl ;

} cout<<x[0]*3<<endl ;

}

Q-2 a. Define Multilevel and Multiple Inheritance with example . 

b. Define a class ELECTION in C++ with the following descriptions: 

Write a suitable main ( ) function also to declare 3 objects of ELECTION type and find the winner and display the details .

Private members :

Data : candidate_name , party , vote_received

Public members :

Functions : Enterdetails ( ) – To input data

Display ( ) – To display the details of the winner

Winner ( ) – To return the details of the winner trough the object after

comparing the votes received by three candidates .

d. Answer the questions (i) to (iv) based on the following code :

class RED 4

{

char n [ 20 ];

void input ( );

protected :

int x , y ;

void read ( );

public :

RED ( );

RED ( int a );

void get_red ( );

void put_red ( );

};

class WHITE : protected RED

{

void a , b ;

protected :

int c , d ;

void get_white( );

public:

WHITE ( );

Void put_white ( );

};

class BLACK : private WHITE

{

void * p ;

char st[20];

protected :

int q;

void get_black( );

public:

BLACK ( );

void put_black ( );

}ob;

a. Name the data members and functions which are accessible by the objects of class BLACK.

b. Give the size of object ob

c. Name the OOPS concept implemented above and its type .

d. Name the members accessible by function get_black( );

3. a) Write a function in C++ to delete a name from a list of names. 

b) An array A[13][14] is stored in the memory along the column with each element occupying 4 bytes. Find out the Base address and address of the element A[3][7] if the element A[4][4] is stored at the address 1300. 

c) Consider the following portion of a program , which implements names queue for Books . Write the definition of function Insert(), to insert a new node in the queue with required information . 

struct Book

{

char names[4][20];

};

class QueueofBooks

{

Book Q[10];

public :

int front ,rear;

QueueofBooks()

{

front=rear=-1; 

}

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