Computer Science
Class 12th
Time Allowed : 3 Hr. M.M.: 70
Code:
083
Q1.(a) What is the difference between the call by value and call by
reference? Give an example in
c++ to illustrate both. 2
(b) Name
the header files, to which the following built-in functions belong to: 1
(i) eof ( ) (ii) isalpha
(c) Identify
and correct the error(s) in the following program: 2
#include<iostream.h.
Main {
float
class = 10.7;
float
y;
y
= class % 5.0;
cout<<class
<<” , “<<y;
}
(d) Give
the output of the following Program: 2
#include<iostream.h
int
a = 3;
void
demo (int &x, int y, int *z)
{
a
+ = x;
y
* = a;
*z
= a + y;
cout<<a<<”,
“’<<x<< “,”<<y<<”,“<<z<<endl;
}
void main( )
{
int a = 2,
b=5;
demo(::a,a,&b);
cout<<::a<<”,”<<a<<”,”<<b;
}
(e) Give
the output of the following Program: 3
#include<iostream.h>
void withdef ( int
HisNum = 30)
{
for ( int I
= 20 ; I<= HisNum; I+= 5)
cout<<I<<”,”;
cout<<endl;
}
void Control( int
&MyNum )
{
MyNum + =
10;
withdef(MyNum);
}
void main( )
{
int YourNum
= 20;
Control(YourNum
);
withdef( );
cout<<
“Number=”<<YourNum<<endl;
}
(f) Study
the following program and select the possible output from it : 2
#inlude<iostream.h>
#include<conio.h>
#include<stdlib.h>
const
int LIMIT = 4;
void
main( )
{
randomize( );
int Points;
Points = 100 + random(LIMIT);
for ( int p = Points; p>=100;
p--)
cout<<p<<”#”;
cout<<endl;
}
(i)
103#102#101#100#
(ii)
103#102#101#100
(iii)
101#102#103#104#
(iv)
103#102#101#100#
Q.2 (a) What
do you understand by Copy Constructor? Explain with suitable example. 2
(b) Answer
the questions (i) and (ii) after going through the following class: 2 class Travel
{
int days;
public:
Travel ( ) //
Function 1
{
Days = 50;
cout << “ Journey starts now” << endl;
}
void sightseeing( ) //
Function 2
{
cout
<< “ Sightseeing in the journey starts” << endl;
}
Travel (int Duration) // Function
3
{
Days =
Duration; cout << “ Journey starts now” << endl;
}
~ Travel ( ) //
Function 4
{
cout
<< “ Happy journey” << endl;
}
};
(i)
In
Object Oriented Programming, what is Function 4 referred as and when does it
get invoked/ called?
(ii)
In
Object Oriented Programming, which concept is illustrated by Function 1 and
Function
3 together? Write an example illustrating the calls for these functions.
(c) Define a class Garments in
C++ with the following descriptions : 4
Private members
:
Gcode of
type string
Gtype of
type string
Gsize of
type integer
Gfabric of
type string
Gprice of
type float
A
function Assign ( ) which calculates
and assigns the value of Gprice as follows :
For
the value of Gfabric “COTTON” ,
Gtype Gprice( Rs)
TROUSER 1300
SHIRT 1100
For
Gfabric other than “COTTON” the above
mentioned Gprice gets reduced
by 10%
Public members:
A constructor to assign initial values of
Gcode, Gtype, and Gfabric with the word
“NOT ALLOTTED” and Gsize and Gprice with 0.
A function Input( ) to input the values of the data members
Gcode, Gtype, Gsize and Gfabric and invoke
the Assign( ) function.
A function to Display( ) which displays the content of all the data
members for a Garments.
(d) Answer
the questions (i) to (iv) based on the following code: 4
class
Car
{
char Model[10];
char Date_of_purchase[10];
char Company[20];
public( );
Car( );
void entercardetail( );
void showcardetail( );
};
class
Accessories : public Car
{
protected:
char stereo_tape[30];
char sheet_cover[20];
public:
float Price;
Accessories( );
void enteraccessoriesdetails( );
void showaccessoriesdetails( );
};
class
Dealer : public car
{
int No_of_dealers;
char dealers_name[20];
int No_of_products;
public:
Dealer( );
void enterdetails( );
void showdetails( );
};
(i)
(a) How many bytes will be required by an object
of class Car and an object of class Dealer?
(b) Which type of inheritance is illustrated in the above c++ code?
(ii)
Write names of all the data members which
are accessible from the objects of class Dealer.
(iii)
Write names of all the members accessible
from member functions of class Accessories.
(iv)
Write names of all the member functions
which are accessible from objects of class Dealer.
Q.3
(a) Write the function SWAPCOL() in
C++ to swap (interchange) the first column elements with
the last column elements , for a
two dimensional integer array passed as the arguments of the function. 3
Ex. If the two dimensional array contains. After
swapping of the content of 1st column and last column it should be
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2
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1
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4
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9
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1
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3
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7
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7
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5
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8
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6
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3
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7
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2
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1
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2
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9
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1
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4
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2
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7
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3
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7
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1
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3
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8
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6
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5
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2
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2
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1
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7
|
(b) If
an array B[11][8] is stored as column wise and B[2,2] is stored at 1024 and
B[3,3] at 1084. Find the addresses of B[5,3] and B[1,1]. 3
(c) Define
functions stackpush( ) to insert nodes and stackpop( ) to delete nodes, for a
linked list implemented stack having the following structure for each node: 4
struct
node
{
char
name[20];
int
age;
node
*LINK;
};
(d) Obtain the postfix notation for the
following infix notation of expression showing the contents of the
stack and postfix expression formed after
step of conversion: 2
A * B + (C – D / FG)* H
(e) Write a user defined function
Upper_half() which takes a two dimensional array A, with size N rows and N
columns as arguments and point the upper half of the array. eg. 2
2 3 1 5 0 2 3 1 5 0
7 1 5 3 1 1 5 3 1
If A is 2 5 7 8 1 The Output Will be 7 8 1
0 1 5 0 1 0 1
3 4 9 1 5 5
Q4. a) Observe
the program segment given below carefully and answer the question that follows:
1
class Team
{
long
TId;
char
TName[20];
float
points;
public:
void
Accept( );
void
Show( );
void
PointChange( );
long
R_TId( ) {return TId;}
};
void
ReplacePoints(long Id)
{
fstream
File;
File.open
(”Team.Dat”,ios::binary|ios::in|ios::out);
Team T;
int
Record=0, found=0;
while(!found
&& File.read((char*)&T, sizeof(T)))
{
if
(Id==T.R_TId( ))
{
cout<<”Enter
New Points”;
T.PointChange ();
_________________
//Statement 1
_________________ // Statement 2
Found=1;
}
Record++;
}
if(Found==1)
cout<<”Record
Updated”;
File.close(
);
}
Write
the statement 1 to position the File Pointer at the beginning of the Record for
which the Team’s ID matches with the argument passed, and Statement 2 to write
the updated record at the Position.
(b) Write a function in C++ to print the count of the word “Me” and “My” (ignoring the case) as an
independent word in a text file STORY.TXT.
If
the file “Story.txt” content is as follows:
My
first book was me and My
family.
It gave me change to be
known
to the world.
The
output of the function should be Count of Me/My in file: 4 2
(c) Write a function in C++ to search and display details, whose destination is “Delhi”
from a binary file “Train.Dat”. Assuming the binary file is containing the
objects of the following class: 3
class TRAIN
{
int
Tno; // Train Number
char
From[20]; // Train Starting Point
char
To[20]; // Train Destination
public:
char
* GetFrom ( ); { return from; }
char
* GetTo( ); { return To; }
void
input() { cin>>Tno>>; gets(From);
get(To); }
void
show( ) { cout<<Tno<<
“:”<<From << “:” <<To<<endl; }
};
Q 5. (a) Differentiate between Primary key and
Foreign Key in context of RDBMS. Give suitable
example. 2
(b)
Consider the following table
DRESS and Material. Write SQL
commands for the
statements (i) to (iv) and give outputs
for SQL quarries (v) to (viii). 6
Table:
DRESS
|
Dcode
|
description
|
price
|
mcode
|
launchdate
|
|
10001
|
Formal Shirt
|
1250
|
M001
|
12-JAN-08
|
|
10020
|
FROCK
|
750
|
M004
|
09-SEP-07
|
|
10012
|
INFORMAL SHIRT
|
1450
|
M002
|
06-JUN-08
|
|
10019
|
EVENING GOWN
|
850
|
M003
|
06-JUN-08
|
|
10090
|
TULIP SKIRT
|
850
|
M002
|
31-MAR-07
|
|
10090
|
PENCIL, SKIRT
|
1250
|
M003
|
19-DEC-08
|
|
10023
|
SLACKS
|
850
|
M003
|
20-OCT-08
|
|
10089
|
FORMAL PANT
|
1450
|
M001
|
09-MAR-08
|
|
10009
|
INFORMAL PANT
|
1400
|
M002
|
20-OCT-08
|
|
10024
|
BABY TOP
|
650
|
M003
|
07-APR-07
|
TABLE: MATERIAL
|
mCODE
|
TYPE
|
|
M001
|
TERELENE
|
|
M002
|
COTTON
|
|
M004
|
POLYESTER
|
|
M003
|
SILK
|
(i)
To display DCODE and
DESCRIPTION of each dress in ascending order of
DCODE.
(ii)
To display the details of
all the dresses which have LAUNCHDATE in between 05-DEC-07 and 20-JUN-08
(inclusive of both the dates)
(iii)
To display the average
PRICE of all the dresses which are made
up of material with MCODE as M003.
(iv)
To display material wise highest
and lowest price of dresses from DRESS table.
(Display MCODE of each dress along with highest and lowest price) .
(v)
SELECT SUM( PRICE) FROM
DRESS WHERE MCODE= ‘M001’;
(vi)
SELECT DESCRIPTION , TYPE
FROM DRESS MATERIAL WHERE DRESS.DCODE>=1250;
(vii)
SELECT MAX(MCODE) FROM
MATERIAL ;
(viii)
SELECT COUNT(DISTINCT
PRICE) FROM DRESS.
Q6. (a) State and verify Absorption’s Law and
Demorgan’s Law using truth table and
algebraically. 2
(b) Write the equivalent Boolean Expression for
the following Logic Circuit 1
(c) Write the SOP form
of a Boolean function G, which is represented in a truth table as follows: 1
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U
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V
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W
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G
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0
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0
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0
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1
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0
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0
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1
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1
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0
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1
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0
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0
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0
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1
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1
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0
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1
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0
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0
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1
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1
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0
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1
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1
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1
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1
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0
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0
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1
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1
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1
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1
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(d) Reduce
the following Boolean Expression using K-Map: 3
F(U,V,W,Z)= ∑(0,1,4,5,6,7,11,12,13,14,15)
(e) Give
the dual of (A+BC+AB) 1
Q.7 (a) What is the
difference between Packet switching and message switching technique? 1
(b) Expand the following terminologies: 1
(i) TDMA
(ii) WLL
(c) What is the utility of Cyber law? 1
(d) What do you understand by cookies 1
(e) The
Reliance Info Sys has set up its Branch at Srinagar
for its office and web based activities. It has 4 Zone of buildings as shown in
the diagram:
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Center to center
distances various blocks
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Zone X to Zone Z
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40 m
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Zone Z to Zone Y
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60 m
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Zone Y to Zone X
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135 m
|
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Zone Y to Zone U
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70 m
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Zone X to Zone U
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165 m
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Zone Z to Zone U
|
80 m
|
Number of
Computers
|
Zone X
|
50
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Zone Z
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130
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Zone Y
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40
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Zone U
|
15
|
(e1) Suggest a most suitable cable layout of
connections between the Zones and topology. 1
(e2) Suggest
the most suitable place (i.e., Zone) to house the server of this organization
with a suitable reason, with justification. 1
(e3) Suggest the placement of the following
devices with justification: 1
(1)
Repeater (2) Hub / Switch
(e4) The
organization id planning to link its head office situated in Mumbai at the
offices at Srinager. Suggest an economic way to connect it; the company is
ready to compromise on the speed of connectivity. Justify your answer. 1
(f) What is the difference
between the LAN and MAN? 2
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