CBSE Class 12 Computer Science Sample Paper 2015 Set A

Q1.(i) Reusability of classes is one of the major properties of OOP’s. How is it implemented in C++. Explain.

(ii) Define a class OUTFIT with the following members :

Private Members : static member Total Price - float

Code, Type , Fabric – String

Size , Price - float

A InitPrice function to calculate and assign the Price as follows :

If Fabric is “ Denim “

Type                   Price

Trouser               1500

Jacket                 2500

for any other Fabric the above price gets reduced by 25%

Public Members

A Constructor initializing all strings with the words “ Not Initialised” and Size and Price to 0 

A function to input the data.

A static function to display the static data

A destructor to display the data of each object.

Write a program to input the information of 15 Brands . Print the information of all Denim items. Also print Total Price of all Jackets .

(iii) In the following program, find the correct possible output(s) from the options. Justify your answer.

#include<iostream.h>

#include<stdlib.h>

const int LOW = 15;

void main( )

{ randomize( );

int Point =5 , No;

for(int i=1; i<=4; i++)

{ No = LOW + random(Point);

cout<<No <<’;’;

Point--; } }

i. 19;16;15;18;

ii. 14;18;15;18;

iii. 19;16;14;18;

iv. 19;16;15;16; ( 2 + 5 + 3 )

Q2. (i) What is constructor overloading . How are different constructors called ?

(ii) Answer the questions given below after going through the following class:

class EMP { int EMPID;

char EMPName[20];

public: ~EMP( ) // Function 1

{ cout<<”Un-Allocated”<<endl; }

void status( ) // Function 2

{ cout<<EMPID<<”;”<<EMPName<<endl; }

EMP( ) // Function 3

{ EMPID=10;

EMPName[0]=’\0’; }

EMP(EMP & X) // Function 4

{ EMPID=X.EMPID+12;

strcpy(EMPName, X.EMPName ); } };

a) Which member function out of function1, function2, function3 and function4 shown in the above example of class EMP is called automatically, when the scope of an object gets over? What is this function called ?

b) EMP W; //Statement 1

EMP Y (W); //Statement 2

Which member function out of Function1, Function2, Function3 and Function4 will be called on execution of Statement 1 and Statement 2? What are these functions specifically known as ?

Please click the link below to download full pdf file for CBSE Class 12 Computer Science Sample Paper 2015 Set A