Science (English Medium) Class 12 - CBSE Question Bank Solutions for Computer Science (C++)

Give a suitable example in C++ to illustrate with its definition within a class and a declaration of an object with the help of it.

A two-dimensional array ARR[50][20] is stored in the memory along the row with each of its elements occupying 4 bytes. Find the address of the element ARR[30] [10], if the element ARR[10] [5] is stored at the memory location 15000.

Write a function REVROW(int P[] [5], int N, int M) in C++ to display the content of a two-dimensional array, with each row content in reverse order.

For example, if the content of the array is as follows:

The function should display output as

Consider the following DEPT and EMPLOYEE tables. Write SQL queries for (i) to (iv) and find outputs for SQL queries (v) to (viii).

Table: DEPT

Table: EMPLOYEE

Note: DOJ refers to the date of joining ·and DOB refers to the date of Birth of employees

1) To display Eno, Name, Gender from the table EMPLOYEE in ascending order of Eno.

2) To display the Name of all the MALE Employees from the table EMPLOYEE.

3) To display the Eno and Name of those employees from the table EMPLOYEE who are born between '1987-01-01' and '1991-12-01'.

4) To count and display FEMALE employees who have Joined after '1986-01-01'.

5) SELECT COUNT(*), DCODE FROM EMPLOYEE GROUP BY DCODE HAVING COUNT(*)>1;

6) SELECT DISTINCT DEPARTMENT FROM DEPT;

7) SELECT NAME, DEPARTMENT FROM EMPLOYEE E, DEPT D WHERE E.DCODE=D.DCODE AND EN0<1003;

8) SELECT MAX(DOJ), MIN(DOB) FROM EMPLOYEE;

Verify the following using Boolean Laws : U'+V = U'V'+ U' .V + U.V

Answer the question (i)  to (iv) based on the following:

class Teacher
{
   int TCode;
protected:
      char Name[20];
public:
      Teacher();
      void Enter() ; void Show();
};

class Course
(
   int ID;
protected:
      Char Title[30];
public:
      Course();
      void Initiate();
      void Display();
};

class Schedule : public Course, private Teacher
{
    int DD, MM, YYYY;
public:
    Schedule();
    void Start();
    void View();
};

void main()
{
   Schedule S;
}

1) Which type of Inheritance out of the following is illustrated in the above example?

2) Write the name of all the member which are directly accessible by the member function View() of Class Schedule.

3) Write the names of all the members, which are directly accessible by the object S of Class Schedule declared in the main() function.

4) What will be the order of execution of the constructors, when the object S of the Class Schedule Schedule is declared inside the main() function?

Answer the questions (i) to (iv) based on the following:

class First
{
    int X1;
protected:
    float X2;
public:
    First();
    void Enter1(); void Display1;
};

class Second: private First
{
    int Y1;
protected:
    float Y2;
public:
    Second();
    void Enter2();
    void Display();
};

class Third : public Second
{
    int Z1;
public:
    Third{);
    void Enter3();
    void Display{);
};

void main()
{
    Third T;  //Statement 1·
    __________;  // Statement 2
}

1) Which type of Inheritance out of the following is illustrated in the above example?

Single Level Inheritance, Multilevel Inheritance, Multiple Inheritance

2) Write the names of all the member functions, which are directly accessible by the object T of class Third as declared in main() function.

3) Write Statement 2 to call function Display() of class Second from the object T of class Third

4) What will be the order of execution of the constructors, when the object T of class Third is declared inside main()?

Answer the questions (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 Wall,Area,ColorCode;
protected:
    char Type;
public:
   Painting();
   void PBook();
   void PView();
};

class Billing : public Painting
{
   float Charges;
   void Calculate();
public:
   Billing();
   void Bill();
   void BillPrint();
};

1) Which type of Inheritance out of the following is illustrated in the above example?

• Single Level Inheritance
• Multi-Level Inheritance
• Multiple Inheritance

2) Write the names of all the data members, which are directly accessible from the member functions of class Painting.

3) Write the names of all the member functions, which are directly accessible from an object of class Billing.

4) What will be the order of execution of the constructors, when an object of class Billing is declared?

Find and write the output of the. following C++ program code

Note : Assume au· required header files are already included in the program.

#define Diff(N1,N2) ((N1>N2)?Nl-N2:N2-N1)
void main()
{
    int A,B,NUM[] = {10,23,14,54,32};
    for(int CNT =4; CNT > 0; CNT--)
    {
        A=NUM[CNT];
        B=NUM[CNT-1];
        cout<<Diff(A,B)<< '#';
    }
}

Find and write the output of the following C++ program code:

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

void Revert(int &Num, int Last=2)
{
   Last =(Last%2==0)?Last+l: Last - l;
   for(int C=l; C <= Last; C++)
      Num+=C;
)

void main()
{
    int A=20, B=4;
    Revert(A, B) ;
    cout<<A<<"&"<<B<<end1;
    B--;
    Revert{A,B);
    cout<<A<<"#"<<B<<endl;
    Revert{B);
    cout<<A<<"#"<<B<<endl;
}

Observe the following C++ code and answer the questions (i) and (ii).

Note: Assume all necessary files are included.

class FIRST
{
   int Numl;
public:
    void Display()
    {
        cout<<Numl<<endl;            //Member Function 1
    }
};

class SECOND: public FIRST
{
    int Num2;
public:
     void Display()                //Member Function 2
     {
         cout<<Num2<<endl;
     }
};

Void main()
{
   SECOND S;
   ___________                    // Statement 1
   ___________                    // Statement 2
  
}

1) Which Objected Programming features is illustrated by the definition of classes FIRST and SECOND?

2) Write Statement 1 and Statement 2 to execute Member Function 1 and Member Function 2 respectively using the object S

Write the definition of a class CONTAINER in C++ with the following description.

Private Members

-Radius, Height      // float

- Type                  // int (1 for Cone, 2 for Cylinder)

- Volume              // float

- CalVolume()       // Member function to calculate

                          // volume as per the Type

Public Members

- GetValues ()    //A function to allow a user to enter of Radius, Height and Type. Also, call function CalVolume() from it.

- ShowAll ()      // A function to display Radius, Height, Type and Volume of Container

Wnte the definition of a member function AddPac ket() for a class QUEUE in C++, to remove/delete a Packet from a dynamically allocated QUEUE of Packets' considering the following code is already written as a part of the program.

struct Packet
{
   int PID;
   char Address[20];
   Packet *LINK;
};

class QUEUE
{
    Packet *Front, *Rear;
public:
    QUEUE(){Front=NULL;Rear=NULL;}
    void AddPacket();
    void DeletePacket();
    ~QUEUE();
};

Look at the following C++ code and find the possible output(s) from the options (i) to (iv) following it. Also, write the maximum values that can be assigned to each of the variables N and M

Note:

• Assume all the .required header files are already being included in the code.
• The function random(n) generates an integer between 0 and n-1

void main()
{
    randomize() ;
    int N=random(3), M=random(4);
    int DOCK[3][3] = {{1,2,3},{2,3,4}, {3,4,5}};
    for(int R=O; R<N; R++)
   {
       for(int C = 0; C< M; C++)
·        cout<<DOCK[R][C]<<" ";
       cout<<endl;
    }
}

1)
2)
3)
4)

Observe the following C++ code and answer the questions (i) and (ii).

Note: Assume all necessary files are included

class TEST
{
    long TCode ;
    char TTitle[20];
    float Score;
public:
    TEST()      //Member Function 1
    {
         TCode=100;strcpy(TTit1e,"FIRST Test"); Score=O;
    };
    TEST(TEST &T)    //Member Function 2
    {
         TCode=E.TCode+1;
         strcpy(TTitle , T.TTitle);
         Score=T.Score;
     }
};

void main()
{
   __________    //Statement 1
   __________    //Statement 2
}

1) Which Object-Oriented Programming feature is illustrated by the Member Function 1 and the Member Function 2 together in the class TEST?

2) Write Statement 1 and Statement 2 to execute Member Function 1 and Member Function 2 respectively.

Write the definition of a member function PUSHGIFT() for a class STACK in C++, to add a GIFT in a dynamically allocated stack of GIFTs considering the following code is already written as a part of the program

struct GIFT
{
    int GCODE;           //Gift Code
    char GDESC[20];      //Gift Description
    GIFT *Link;
};
class STACK
{
    Gift *TOP;
public:
    STACK(){TOP=NULL;}
    void PUSHGIFT{);
    void POPGIFT();
    ~STACK();
};

Differentiate between communication using Optical Fiber and Ethernet Cable in context of the wired medium of communication technologies.

Observe the following C++ code and answer the questions (i) and (ii):

class Passenger
{
   long PNR;
   char Name[20];
public:
   Passenger () · //Function 1
   { cout<<"Ready"<<endl; }

   void Book(long P,char N[]) //Function 2
   { PNR = P; strcpy(Name, N);}

   void Print () //Function 3
   { cout«PNR << Name <<endl; }
   
   -Passenger() //Function 4
   { cout<<"Booking cancelled! "<<endl;}
};

1) Fill in the blank statements in Line 1 and Line 2 to execute Function 2 and Function 3 respectively in the following code:

void main()
{
   Passenger P;
   _________      //Line 1
   _________      //Line 2
}//Ends here

2) Which function will be executed at } // Ends here? What is this function referred as?

Write the definition of a class Photo In C++ with the following description:

Private Members

- Pno    //Data member for Photo Number (an integer)

-Category //Data.member for Photo Category (a string)

- Exhibit I // Data member for Exhibition Gallery (a string) 

- FixExhibit //A member function to assign Exhibition Gallery as per Category as shown in the following table

Public Members

-Register()   //A function to allow user to enter values Pno I category and call FixExhibi t () function

- ViewAll()  //A function to display all the data members

Write the definition of a member function PUSH( ) in C++, to add a new book in a dynamic stack of BOOKS considering the following code is already included in the program

struct BOOKS
{
   char ISBN[20], TITLE[80];
   BOOKS *Link;
};
class STACK
{
   BOOKS *Top;
public:
   STACK-() {Top=NULL;}
   void PUSH();
   void POP();
   ~STACK();
};