CBSE Class 12 Computer Science Sample Paper 2014 Set 07

1. (a) Differentiate between a global variable and a local variable. Also give suitable example in C++. 

2. (b) Name the Header file(s) that shall be needed for successful compilation of the following C++ code

void main()

{

char st[20];

gets(st);

if(isaplha(st[0])

cout<<”Starts with alphabet”;

else

cout<<strlen(st);

} 1

(c) Rewrite the following program after removing syntactical error(s) if any.

Underline each correction. 

#include<iostream.h>

#define SIZE =10

void main()

{

int a[SIZE]={10,20,30,40,50};

float x=2;

SIZE=5;

for(int i=0;i<SIZE;i++)

cout<<a[i]%x;

}

(d) Find the output of the following program : 

#include<iostream.h>

#include<string.h>

struct Student

{

int rno;

char name[20];

};

void main()

{

student a[2]={1,”Amit”,}{2,”Sumit”}};

for(int i=0;i<2;i++)

{

cout<<”\n Rno”<<a[i].rno;

cout<<”\n Name “;

for(int j=0;j<strlen(a[i].name);j++)

cout<<a[i].name[i]<<” “;

}

}

(e) Find the output of the following program 

#include<iostream.h>

void Modify(int &a,int b=10)

{

if(b%10==0)

a+=5;

for(int i=5;i<=a;i++)

cout<<b++<<”:”;

cout<<endl;

}

void Disp(int x)

{

if(x%3==0)

Modify(x);

else

Modify(x,3);

}

void main()

{

Disp(3);

Disp(4);

Modify(2,20);

}

(f) In the following C++ program , fill in the blanks for the statement1 with the help of random function , if the number generated by the random number is supposed to be between the range of 20-2000 

#include<iostream.h>

#include<stdlib.h>

void main()

{

int r;

randomize();

r=___________________//statement 1

cout<<r;

}

(g) Define typedef with a suitable example. 

2.(a) Differentiate between a default and a parameterized constructor in context of class and object . Give suitable example in C++. 

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

class Computer

{

char C_name[20];

char Config[100];

public:

Computer(Computer &obj); // function1

~Computer(); //function 2

};

(i) Write the statement(s) which will invoke the function 1.

(ii) Name the specific feature of the class shown by function 2. Also write the time of its invoke.

(c) Define a class Shop in C++ with the description given below : 

private members name array of 40 characters address array of 40 characters type of item array of 3X20 characters availqty array of 3 integers totalqty array of 3 integers public members init() function to ask and store the values of address ,type of items , availqty & totalqty.

purchase() function to ask the qty purchased and type of item from the user and updates the totalqty and avialqty accordingly . 

for example : if the type of items available in the shop are : “Cosmetic” , ”Food Products” , ”Medicines” . And the shop keeper purchase the “Cosmetic” item then update the availqty and totalqty ofthe“Cosmetic”item. display() function to display the details of the item in the following format :

Name : <SHOP NAME >

Address :<ADDRESS >

Items : <Type of Item 1> <Type of Item 2> <Type Of item 3>

Balance Stock : <avialqty> <availqty> <avialqty> 

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