CBSE Class 12 Computer Science Sample Paper 2017 Set 02 Solved

Section – A

1 (a) Explain conditional operator with suitable example? 2

(b) Which C++ header file(s) are essentially required to be included to run/execute the following C++ code :

void main()

{

char *word1="Hello",*word2="Friends";

strcat(word1,word2);

cout<<word1;

}1

(c) Rewrite the following program after removing the syntactical errors

(if any). Underline each correction.

#include<conio.h>

#include<iostream.h>

#include<string.h>

#include<stdio.h>

class product

{

int product_code,qty,price;

char name[20];

public:

product(){

product_code=0;qty=0;price=0;

name=NULL;

}

void entry()

{ 

cout<<"\n Enter code,qty,price";

cin>>product_code>>qty>>price;

gets(name);

}

void tot_price() {return qty*price;}

};

void main()

{

p product;

p.entry();

cout<<tot_price();

}

(d) Write the output of the following C++ program code:

Note: Assume all required header files are already being included in the program.

void change(int *s)

{

for(int i=0;i<4;i++)

{

if(*s<40)

{

if(*s%2==0)

*s=*s+10;

else

*s=*s+11;

}

else

{

if(*s%2==0)

*s=*s-10;

else

*s=*s-11;

}

cout<<*s<<" ";

s++;

}

}

void main()

{ 

int score[]={25,60,35,53};

change(score);

}

(e) Write the output of the following C++ program code:

Note: Assume all required header files are already being included in the program.

class seminar

{

char topic[30];

int charges;

public:

seminar()

{

strcpy(topic,"Registration");

charges=5000;

}

seminar(char t[])

{

strcpy(topic,t);

charges=5000;

}

seminar(int c)

{

strcpy(topic,"Registration with Discount");

charges=5000-c;

}

void regis(char t[],int c)

{

strcpy(topic,t);

charges=charges+c;

}

void regis(int c=2000)

{

charges=charges+c;

}

void subject(char t[],int c)

{

strcpy(topic,t);

charges=charges+c;

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