CBSE Guess > Papers > Question Papers > Class XII > 2006 > Computer Science > Compartment Delhi Set -I
Computer science — 2006 (Set I — Compartment Delhi)
Q. 1.
- Name the header file to which the following belong: (1)
(i) gets( )
(ii) open( ) - Illustrate the use of local and global variables in C++. (2 )
- Rewrite the following program after removing the syntactical error(s), if any Underline each correction, (2)
#include <iostream.h>
void main( )
{ struct TV
{ char Manu_name[20];
char Tv_Type;
int Price = 17000;
} New Tv;
gets(Manu_name);
gets(Tv_Type);
} - Find the output of the following program: (3)
#include<iostream.h>
#include<string.h>
class country
{ char *country name;
int length;
public:.
country ( ) {Iength =0; country_name=new char [length+1];}
country (char *s)
{ length = strlen(s); country_name=new char [length +1];
strcpy (country_name, s);
}
void display () { cout<< country_name <<endl;}
void Replace (country & a, country & b)
{ length a.length + b.length;
delete country_name;
country_name=new char [length + 1];
strcpy (country_ name, a.country_name);
strcat (country_name, b.country name);
}
};
void main ( )
{ char * temp = “India”;
country country1 (temp), country2 (“Nepal”), country3 (“China”), S1,S2;
S1.Replace (country1, country2);
S2.Replace (S1,country3);
S1.display( );
S2.display ( );
} - Find the output of the following program: (2)
#include < iostream.h>
void main( )
{ int *Pointer Array [10];
int marks [ = {75, 68, 90, 34, 0, 10, 90, 65};
for (int I = 0; marks [ I]!=0; I++)
{ PointerArray [I]=&marks[I];
* (PointerArray [I] ) += 5;
}
int index = 0;
while(index < I )
{ int p=*(PointerArray[index] );
if(p >=60) cout <<p<<’,’;
index ++;
}
} - What is the importance of constructor in object oriented programming? Explain with the help of an example. (2)
Q. 2.
- What is the difference between Multilevel and Multiple Inheritance in context to object oriented programming? (2)
- Given a class as follows:
class Match
{ int Time;
public:
Match (int y) { Time = y;} //Constructor 1
Match (Match& t); //Constructor 2
};- Create an object, such that it invokes Constructor 1.
- Write complete definition for Constructor 2.
- Define a class named MOVIE in C++ with the following description (4)
Private members
HALL_NO integer
MOVIE_NAME Array of characters (String)
WEEK integer (Total number of weeks the same movie is shown)
WEEK_COLLECTION Float
TOTAL_COLLECTION Float
Public Members- Function Read_Data( ) to read an object of ADMISSION type
- Function Display( ) to display the details of an object
- Function Update( ) to update the total collection and Weekly collection once the week changes. Total collection will be incremented by Weekly collection and Weekly collection is made Zero.
- Answer the questions (i) to (iii) based on the following code:
class toys
{
char Code;
char Manufacturer [10];
public:
toys( );
void Read_toy_details ( );
void Disp_toy_details( );
};
class electronic : public toys
{
int no_of_types;
float cost_of_toy;
public:
void Read_elect_details ( );
void Disp_elect_details ( );
};
class infants : private electronic
{
int no_of_buyers;
char delivery date[10];
public:
void Read_infant_details ();
void Disp_jnfant_details();
};
void main ( )
{ infants MyToy; }- Mention the member names which are accessible by MyToy declared in main () function. (1)
- What is the size of MyToy in bytes? (1)
- Mention the names of functions accessible from the member function Read_infant_details () of class printer. (2)
Q. 3.
- Write a function in C++ which accepts an integer array and its size as arguments/ parameters and then assigns the elements into a two dimensional array of integers in the following format: (4)
If the array is 1, 2, 3, 4, 5, 6
The resultant 2 D array is given belowIf the array is 1, 2, 3
The resultant 2 D array is given below0
0
0
0
0
60
0
0
0
5
50
0
0
4
4
40
0
3
3
3
30
2
2
2
2
21
1
1
1
1
10
0
30
2
21
1
1 - An array MAT [15] [7] is stored in the memory along the column with each element occupying 2 bytes of memory. Find out the base address and the address of element MAT [2] [5], if the location of MAT [5] [4] is stored at the address 100. (4)
- What is circular queue? How is it different from simple queue?
Write a function in C++ to perform Delete operation in dynamically allocated Queue containing names of students. (4) - Write a function bubble_sort to sort the passed array of 10 integers in descending order using bubble sort.
- Evaluate the following postfix expression using a stack and show the contents of the stack after execution of each operation.
5,10,*,20,2,/,+
Q. 4.
- Write a function to count the number of VOWELS present in a text file named “PARA.TXT”. (3)
- Following is the structure of each record in a data file named “VEHICLE.DAT”.
struct VEHICLE
{ char Vehicle_Code [10];
char Vehicle_Name[10];
float cost;
};
Write a function in C++ to update the tile with a new value of cost for a particular Vehicle. The value of Vehicle_Code and cost are read during the execution of the program. (3)
Q. 5.
- What is a Candidate Key? (2)
- Study the following tables STAFF and SALARY and write SQL commands for the questions (i) to (iv) and give outputs for SQL queries (v) to (vi). (6)
TABLE: STAFF
ID NAME DEPT SEX EXPERIENCE 101 Siddharth SALES M 12 104 Raghav FINANCE M 5 107 Naman RESEARCH M 10 114 Nupur SALES F 3 109 Janvi FINANCE F 9 105 Rama RESEARCH M 10 117 James SALES F 3 111 Binoy FINANCE F 12 130 Samuel SALES M 15
TABLE SALARY
ID BASIC ALLOWANCE COMMISSION% 101 12000 1000 3 104 23000 2300 5 107 32000 4000 5 114 12000 5200 10 109 42000 1700 20 105 18900 1690 3 130 21700 2600 30 - Display NAME of all staff who are in “SALES” having more than 10 years experience from the table STAFF.
- Display the average salary of all staff working in “FINANCE” department using the tables STAFF and SALARY. SALARY BASIC + ALLOWANCE.
- Display the minimum ALLOWANCE of female staff.
- Display the highest commission% among all male staff.
- SELECT count (*) from STAFF where SEX = “F”.
- SELECT NAME, DEPT, BASIC from STAFF, SALARY where DEPT = “SALES” and STAFEID = SALARY.ID.
Q. 6.
- State and verify De Morgan’s theorem. (2)
- Write the equivalent expression for the following logical circuit: (2)
- Express P’ + QR’ in canonical SOP form.
- Reduce the following Boolean expression using K-Map:
F(P,Q,R,S)=∑(l,3,5,8,11,12,15
Q. 7.
- Explain function of Modem and Switch.
- Expand the following terms:
- FTP
- HTML
- XML
- WWW
- Write one advantage of BUS topology as compared to STAR topology. (1)
- ABC SWITCHEARS LTD in srinagar is setting up the network between its different departments located in different wings. There are 4 wings named as Manufacturing (M), Research (R), Administration (A) and Personnel (P).
Distances between various wings are given below:
Number of Computers:Wing A to Wing M 100 m Wing A to Wing R 200 m Wing A to Wing P 400 m Wing M to Wing R 300 m Wing M to Wing P 100m Wing R to Wing P 450 m
Wing M 15 Wing R 100 Wing A 50 Wing P 150 - Suggest a suitable Topology for networking the computers of all wings. (1)
- Name the wing where the Server is to be installed. Justify your answer. (1)
- Suggest the placement of Hub/Switch in the network. (1)
- Mention an economic technology to provide Internet accessibility to all wings. (1)
| Computer Science 2006 Question Papers Class XII | |||||||
| Delhi | Outside Delhi | Compartment Delhi | |||||
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Set I | |
Set I | |
Set I | ||
