NCERT Solutions for Class 12 Computer Science (C++) – Inheritance
Long Answer Type Questions
Question 1:
Answer the questions (i) to (iv) based on the following :
class ITEM
{
int ID;
char IName[20];
protected:
float Qty;
public:
ITEM();
void Enter();
void View();
};
Class TRADER;
{
int DCode;
Protected:
char Manager[20];
public:
TRADER();
void Enter();
void View();
};
class- SALEPOINT :
public ITEM, private TRADER
{
Char
Name[20],Location[20];
public:
SALEPOINT();
void EnterAll();
void ViewAll();
};
(i)Which type of
Inheritance out of the following is illustrated in the above example ?
- Single Level Inheritance
- Multi Level Inheritance
- Multiple Inheritance
(ii)Write the names of
all the data members, which are directly accessible
from the member
functions
of class SALEPOINT.
(iii)Write the names
of all the member functions,
which are directly
accessible by an object of
class SALEPOINT.
(iv)What will be the
order of execution of the constructors, when an object of class
SALEPOINT is declared
?
Аnswer:
1.
Multiple Inheritance
2.
Name, Location,
Manager, Qty
3.
EnterAll ( ) , VeiwAll
( ) , Enter ( ) ,ViewO
4.
ITEM ( ) , TRADER (),
SALEPOINT ()
Question 2:
Give the following class definition answer the question that is follow :
class University
{
char name[20];
protected:
char vc[20];
public :
void estd();
void inputdata();
void outputdata();
}
class College :
protected University
{
int regno;
protected
char principal()
public :
int no_of_students;
void readdata();
void dispdata();
};
class Department :
public College
char name[20];
char HOD[20];
public:
void fetchdata(int);
void displaydata();
}
(i) Name the base
class and derived class of college.
Аnswer:
Base class : University
Derived class : Department
(ii) Name the data member(s) that can be accessed from function display data.
Аnswer:
char name [20], char principal), no_of_students, char vc[20]
(iii) What type of inheritance is depicted in the above class definition ?
Аnswer:
Multilevel Inheritance
(iv) What will be the size of an object (in bytes) of
class Department ?
Аnswer:
85 bytes.
Question 3:
Answer the question (i) to (iv) based on the following :
class Exterior
{
int orderld;
char Address[20];
protected:
float Advance;
public:
Exterior();
void Book();
void View();
};
class Paint : public
Exterior
{
int Wall Area,
ColorCode;
protected:
char Type;
public:
paint();
void PBook();
void PView()
};
class Bill : public
Paint
{
float Charges;
void Calculate();
public:
Bill();
void Billing();
void Print();
};
(i)Which type of
Inheritance out of the following is illustrated in the above example ?
— Single Level Inheritance
— Multi Level
Inheritance
— Multiple Inheritance
Аnswer:
Multi Level Inheritance
(ii) Write the names of all the data members, which are directly accessible
from the member functions of class Paint.
Аnswer:
Wall Area, Color Code, Type, Advance
Note : No marks to be awarded for any partial/ additional answer(s)
(iii) Write the names of all the member functions, which are directly
accessible from an object of class Bill.
Аnswer:
Billing( ), Print( ), PBook( ), PView( ), Book( ), View( )
Note :
• No marks to be awarded for any partial/ additional answer(s)
• Constructors can be ignored
(iv) What will be the order of execution of the constructors, when an object of
class Bill is declared ?
Аnswer:
Exterior(), Paint (), Bill()
Note : No marks to be awarded for any other order
Question 4:
Write the definition of a class Photo in C + + with following description :
Private Members
— Pno // Data member for Picture Number (an integer)
— Category // Data member for Picture Category (a string)
— Exhibit // Data member for Exhibition Location (a string)
— Fix Exhibit // A member function to assign
//Exhibition Location as per category
//as shown in the following table
|
Category |
Exhibit |
|
Antique |
Zaveri |
|
Modern |
Johnsen |
|
Classic |
Terenida |
Public Members
— Enter ( ) //A function to allow user to enter values //Pno, category and call
FixLocation () function
— SeeAll ( ) //A function to display all the data members
Аnswer:
class photo
{
int Pno;
char Category [20]; char Exhibit [20]; void
FixExhibit (); public :
void Register();
void ViewAll();
};
void Photo :: FixExhibit()
{
if(strcmpi(category,
"Antique") == 0)
strcpy(Exhibit,
"Zaveri");
else
if(strcmpi(Category,"Modern") == 0)
strcpy (Exhibit,
"Johnsen");
else if
strcmpi(Category,"Classic") == 0)
strcpy(Exhibit,
"Terenida");
}
void Photo ::
Register()
{
cin>>"Pno";
gets(Category);
FixExhibit 0;
}
void Photo ::
ViewAll()
{
coute<Pno<<Category<<Exhibit<<endl;
}
Question 5:
Answer the question (i) to (iv) based on the following :
class Interior
{
int OrderId;
char Address[20];
protected:
float Advance;
public:
Interior();
void Book();
void View();
};
class Painting :
public Interior
{
int WallArea,
ColorCode;
protected:
char Type;
public:
Painting();
void PBook();
void PView();
};
class Billing : public
Painting
{
float Charges;
void Calculate();
public:
Billing();
void Bill();
void BillPrint();
};
(i) Which type of
Inheritance of the following is illustrated in the above example ?
— Single Level Inheritance
— Multi Level
Inheritance
— Multiple Inheritance
Аnswer:
Mutli Level Inheritance
(ii) Write the names of all the data members, which are
directly accessible from the member functions of class painting.
Wall Area, Color Code, Type, Advance
Note :
• No marks to be awaarded for any partial or additional
answer(s)
(iii) Write the names of all the member functions, which are
directly accessible from an object of class Billing. Bill(), BillPrint(),
PBook(), PViewQ, Book(), View()
Note : No marks to be awarded for any partial/ additional answer(s)
• Constructors can be ignored
(iv) What will be the order of execution of the constructors, when an object of
class Billing is declared ?
Аnswer:
Interior, Painting, Billing
Note : No marks to be awarded for any other order
Question 6:
Answer the questions (i) to (iv) based on the following code :
class AC
{
char Model[10];
char
Date_of_purchase[10];
char Company[20];
public();
AC();
void enter car
detail();
void show car
detail();
};
class Accessories :
protected AC
{
protected:
char Stabilizer[30];
char AC_cover[20];
public:
float Price;
Accessories();
void
enteraccessoriesdetails();
void
showaccessoriesdetails();
};
class Dealer : public
Accessories
{
int No_of_dealers;
char dealers_name[20];
int No_of_products;
public:
Dealer();
void enterdetails();
void showdetails();
};
(i)How many bytes will
be required by an object of class Dealer and class Accessories?
(ii)Which type of
inheritance is illustrated in the above c++ code ? Write the base class and
derived class name of
class Accessories.
(iii)Write names of
all the members which are accessible from the objects of class Dealer.
(iv)Write names of all
the members accessible from member functions of class Dealer.
Аnswer:
(i) Object of Dealer = 118 bytes and object of Accessories = 98 bytes
(ii) Multilevel Inheritance, Base class = AC,
Derived class = Dealer
(iii) enterdetails(), showdetails(), price, enteraccessoriesdetails(),
showaccessoriesdetails()
(iv) No_of_dealers, dealers name, No_of_products, enterdetails(),
showdetails(), Stablizer, Ac_cover, price, enteraccessories details(),
showaccessoriesdetails(), entercardetail, showcardetail()
Question 7:
Consider the following class state :
class State
{
protected:
int tp; //no. of
tourist places
public:
State()
{
tp = 0;
}
void inctp()
{
tp++;
}
int gettp()
{
return tp;
}
};
Write a code in C + +
to publically derive another class 'District'
with the following
additional
members derived in the
Public visibility mode.
Data Members
distname - char(50)
population - long
Member functions:
dinput() - To enter
distname and population.
doutput() - To display
distname and population on screen.
Аnswer:
class District :
public state
{
private:
char *distname[50];
long population;
public :
void dinput()
{
gets(distname);
cin>>population;
}
void output()
{
puts(disname);
cout>>population
;
}
}
Question 8:
Define a class Dance Academy in C++ with following description :
Private Members :
• Enrollno of type int
• Name of type string
• Style of type string
• Fee of type float
• A member function chkfee( ) to assign the value of fee
variable according to the style entered by the user according to the criteria
as given below.
|
Style |
Fee |
|
Classical |
10000 |
|
Western |
8000 |
|
Freestyle |
11000 |
Public Members
• A function enrollment) to allow users to enter values for Enrollno, Name,
Style and call function chkfee( ) to assign value of fee variable according to
the Style entered by the user.
• A function display( ) to allow users to view the details of all the data
members.
Аnswer:
class Dance Academy
int
Enrollno;
char Name[20];
Char, style[20-]
Float Fee;
void chkfee()
{
if(strcmpi(Style."Classical")==0)
Fee=10000;
else
if(strcrapi(Style,"Western")==0)
Fee=8000;
else
if(strcmpi(Style,"Freestyle")==0)
Fee=11000;
}
public;
void enrollment()
{
cout<<"Please
enter Enrollno,Name,Style";
cin>>Enrollno;
gets(Name);
gets(Style);
chkfee();
}
void display()
{
cout<<"\n
Entered Enrollno, Name Style, and Fee is:
"<<Enrollno<<"t"<<Name<<"\t"<<Style<<"\t"<<Fee;
}
};
Question 9:
Consider the following C++ code and answer the questions from (i) to (iv) :
Class Campus
{
long Id;
char City[20];
protected:
char Country[20];
public:
Campus();
void Register();
void Display();
};
class Dept:private
Campus
{
long DCode[10];
char HOD[20];
protected:
double Budget;
public:
Dept();
void Enter();
void Show();
};
class Applicant:public
Dept
{
long RegNo;
char Name[20];
public:
Applicant();
void Enroll();
void View();
};
(i) Which type of
Inheritance is shown in the above example?
(ii) Write the names
of those member functions,
which are directly
accessed from the objects of
class Applicant.
(iii) Write the names
of those data members,
which can be directly
accessible from the member
functions of class
Applicant.
(iv) Is it possible to
directly call function Display()
of class University
from an object of
class Dept?
(Answer as Yes or No).
Аnswer:
(i) Multilevel Inheritance
(ii) Enroll(), View(), Enter(), Show().
(iii) RegNo., Name, Budget.
(iv) No.
Question 10:
Consider the following and answer the question given below:
class ITEM
{
char ICode[10];
protected:
char IName[20];
public:
ITEM();
void Enter():
void Display();
};
class SUPPLIER
{
char SCode [10];
protected:
char SName[25];
public :
SUPPLIER();
void TEnter();
void TDisplay();
};
class SHOP: private
SUPPLIER, public ITEM
{
char SHOPADDRESS [15],
SEmail [25];
public:
SHOP();
void Enter();
void Display();
};
(i)Which type of
inheritance is shown in the above example?
(ii)Write the names of
all the member functions accessible from Enter()
function of class
SHOP.
(iii)Write name of all
the member functions accessible through an object of class SHOE
(iv)What will be the
order of execution for the constructors ITEM(), SUPPLIER() and SHOP(),
when an object of
class SHOP is declared?
Аnswer:
(i) Multiple
inheritance.
(ii) Display (), TEnter(), TDisplay, Enter(), DisplayO.
(iii) Enter(), DisplayO, ITEM.Enter(), Item. Display.
(iv) ITEM(), then SUPPLIER(), then SHOP().
Question 11:
Consider the following C++ code and answer the questions from (i) to (iv) :
class Personal:
{
int Class, Rno; char
Section; protected:
char Name[20];
public:
Personal();
void Pentry();
void Pdisplayf();
};
class Marks:private
Personal
{
float M[5];
protected:
char Grade[5];
public:
Marks();
void Mentry();
void Mdisplay();
};
class Result : public
Marks
{
float Total, Agg;
public:
char
FinalGrade,Comments[20];
Result();
void Rcalculate();
void Rdisplayt();
};
(i) Which type of inheritance
is shown in the above example ?
(ii) Write the names
of those data members,
which can be directly
accessed from the objects of
class result.
(iii) Write the names
of those member functions,
which can be directly
accessed from the objects
of class Result.
(iv) Write the names
of those data members,
which can be directly
accessed from the Mentry() function
of class Marks.
Аnswer:
1.
Inheritance Type:
Personal Base class
↓
Marks Sub class of personal
↓
Result Sub class of Result
Multilevel Inheritance
2.
FinalGrade
Comments [20]
3.
Rcalculate ( )
Rdisplay ( )
Mentry ( )
Mdisplay ( )
4.
M [5], Rno, Class,
Section,
Grade [5]
Question 12:
Consider the following C++ code and answer the questions from (i) to (iv):
class Student
{
int Class, Rno;
char Section;
protected :
char SName[20];
public:
Student();
void Stentry();
void StdisplayO;
};
class Score: private
Student
{
float Marks[5];
protected:
char Grade[5];
public:
Score();
void Sentry();
void Sdisplay();
};
class Report : public
Score
{
float Total, Avg;
public:
char OverallGrade,
Remarks[20];
Report();
void Revaluate();
void RPrint();
};
(i) Which type of
inheritance is shown in the above example?
(ii) Write the names
of those data members,
which can be directly
accessed from the objects of class
Report.
(iii) Write the names
of those member function,
which can be directly
accessed from the objects of
class Report.
(iv) Write the names
of those data members,
which can be directly
accessed from the Sentry( )
function of class
Score.
Аnswer:
1.
Student
↓
Score
↓
Report
This is multilevel inheritance:
2.
Data Members:
Total,
Avg,
OverallGrade,
Remarks [20],
3.
Member functions:
Report ( ),
REvaluate ( ),
RPrint ( ),
Score ( ), .
Sentry ( ),
Sdisplay ( ).
4.
Data members
Marks [5], Class, Rno, Section,
Grade [5], SName.
Question 13:
Answer the questions (i) to (iv) based on the following:
class COMPANY
{
char Location[20];
double budget, income;
protected:
void Accounts();
public :
COMPANY();
void Register();
void Show();
};
class FACTORY : public COMPANY
{
char Location[20];
int Workers;
protected:double
salary;
void Computer();
public:
FACTORY();
void Enter();
void Show();
};
class SHOP:private
Company
{
char Location[20];
float Area;
double Sale;
public:
SHOP();
void Input();
void Output();
};
(i) Name the type of
inheritance illustrated in the above C+ + code.
(ii) Write the name of
data members which are accessible from the member
functions of class
SHOE
(iii) Write the name
of member functions which are accessible
from the objects of
class FACTORY.
(iv) Write the name of
data members which are accessible from the objects of class SHOE
(ii) None
(iii) Enter(), Show(), Register( ), Accounts company :: Show ().
(iv) Data Members : NONE
Question 14:
Answer the questions (i) to (iv) based on the following:
class ORGANIZATION
{
char Address[20];
double budget, income;
protected:
void Compute();
public:
ORGANIZATION();
void Get();
void Show();
};
class WORKAREA :
public ORGANIZATION
{
charAddress[20];
int staff;
protected:
double pay;
void Calculate();
public:
WORKAREA();
void Enter();
void Display();
};
class SHOWROOM:private
ORGANIZATION
{
char Address[20];
float Area;
double Sale;
public:
SHOWROOM();
void Enter();
void Show();
};
(i) Name the type of
inheritance illustrated in the above C+ + code.
(ii) Write the name of
data members
which are accessible
from the member functions of class SHOWROOM.
(iii) Write the name
of member functions which are accessible
from the objects of
class WORKAREA.
(iv) Write the name of
members which are accessible from the objects of class SHOWROOM.
Аnswer:
(i) Hierarchical Inheritance
(ii) Address, Area, Sale, Budget, Income.
(iii) Enter(), Display(), Get (), Show()
(iv) Data Members: NONE
Member Functions: Enter(), Show()
Question 15:
Answer the questions (i) to (iv) based on the following:
class indoor_sports
{
int i_id;
char i_name[20];
char i_coach[20];
protected:
int i_rank,i_fee;
void get_ifee()
public:
indoor_sports();
void iEntry();
void ishow();
};
class outdoor_sports
{
int o_id;
char o_name[20];
char o_coach[20];
protected;
int orank,ofee;
void get_ofee();
public;
outdoor_sports();
void oshow();
};
class sports:public
indoor_sports, protected outdoor_sports
{
char rules [20];
public;
sports();
void registration();
void showdata();
};
(i)Name the type of
inheritance illustrated in the above C+ + code.
(ii) Write the names
of all the members, which are accessible
from the objects
belonging to class
outdoor_sports.
(iii) Write the name
of member functions which are accessible
from the objects of
class sports.
(iv) What will be the
size of the object belonging to class indoor_sports?
Аnswer:
(i) Multiple Inheritance.
(ii) Data Member; None
Member Funcitons; oEntry(), oShow()
Note :
No marks to be awarded for any partial or additional answer (s)
(iii) registration(), showdat(), oEnty(), oShow(), get_ofee(), iEntryO,
iShow(), get_ ifee()
Note :
No marks to be awarded for any partial or additional answer (s)
(iv) 46 Bytes
Question 16:
Write the definition of a class DISTRICT in C++ with following description :
Private Member
– Dcode
//Data member for code (an integer)
– DName
//Data member for Name (a string)
– DPop
//Data member for Population (a long int)
– Area
//Data member for Area Coverage
(a float)
– Density
//Data member for Population Density
(a float)
– DenCal()
//A member function to calculate //Density as Pop/Area
Public Members
– Input()
//A function to allow user to enter
values of
//Dcode, DName, DPop, Area and call
DenCal () //function
– ShowALL()
//A function to display all the data
members
//also display a message “Highly Populated Area”
//if the Density is more than 12000
Аnswer:
Class DISTRICT
{
int DCode;
char DName[20];
long int DPop;
Float Area;
Float Dens;
Void Dencal();
Public:
void Input();
void showALL();
};
void DISTICT::Input()
{
cin>>Dcode;
gets(DName);//OR
cin>>Dname;
cin>>DPop;
cin>>Area;
Dencal();
}
void
DISTRICT::ShowALL()
{
cout<<Dcode<<DName<<DPop<<Area<<Dens;
//Ignore endl
if(Dens>12000)cout<<"Highly
Populated Area";
\\Ignore endl
}
void
DISTRICT::Dencal()
{
Dens=DPop/Area;
}
Question 17:
Answer the questions (i) to (iv) based on the following :
class PACKAGE
{
int PCode;
char PDes[20];
protected:
float PQty;
public :
PACKAGE();
void In();
void DispO;
};
class TRANSPORT
{
int TCode;
protected:
char TName[20];
public:
TRANSPORT();
void Enter();
void Display();
};
class DELIVERY:public
PACKAGE, private TRANSPORT
{
char
Address[40],Date[12];
public:
DELIVERY();
void Input();
void Show();
}
(i) Which type of
Inheritance out of the following illustrated in the above example?
• Single Level
Inheritance
• Multi Level
Inheritance
• Multiple Inheritance
(ii) Write the names
of all the data members,
which are directly
accessible from the member functions
of class DELIVERY.
(iii) Write the names
of all the member functions,
which are directly
accessible by an object of
class DELIVERY.
(iv) What will be the
order of execution of the constructors,
when and object of
class DELIVERY
is declared ?
Аnswer:
(i) Multiple Inheritance.
(ii) PQty, IName, Address, Date
(iii) Input(), show(), In(), Disp()
(iv) PACKAGE(), TRANSPORTO, DELIVERY()
 – Inheritance){kind=link}
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