Sample Paper Class - XII Computer Science 2008

Class – XII
Subject – Computer Science

Basic theory (4 Marks)

• What do you understand by procedural programming paradigm?

• What do you understand by object oriented programming paradigm?

• Explain all the features of OOPs with their implementation in C++.

• Why main function is so special in C++. Give at least two reasons.

• Write two advantages of using #include complier directive.

• Differentiate between a run time error and syntax error. Give one example of each.

• Illustrate the concept of function overloading with the help of an example.

• Why is a destructor function required in classes? illustrate with the help of an example.

• Illustrate the use of this pointer with the help if an example.

• What is the use of a constructor function in a class ? Give a suitable example for a constructor function in a class.

• Illustrate the concept of function overloading with the help of an example.

• Differentiate between a constructor and destructor function.

• Illustrate the use of “self referencing structures” with the help of an example.

• What is the purpose of a header file in a program?

• What do you understand about a base class & a derived class ? if a base class and a derived class each include a member function with the same name and arguments , which member function will be called by the object of the derived class if the scope operator is not used ?
  

• What do you understand about a member function ? how does a member function differ from an ordinary function ?

• Differentiate between call by value & call by reference with a suitable example.

• Differentiate between  global & local variable with a suitable example.

• Differentiate between nested class & inheritance with a suitable example.

• Differentiate between default & copy constructor with a suitable example.

• What are advantages of OOPs over procedural programming?

• Illustrate the use of #define in C++ to define a macro.

• Define Multilevel & multiple inheritance in context of OOP with suitable example.

• Illustrate the use of inline function in C++ with the help of a suitable example.

• What is a default constructor ? how does it differ from destructor?

• Differentiate between a date type struct & a data type class in C++.

• Explain the concept constructor overloading with a suitable example.

• What do you understand by visibility modes in class derivations ? what are these modes.

• What do you understand by Syntax Error, logical Error & Run time error.

• Define the term #define & typedef with suitable example.

Error (2or 3 marks)

• #include<iostream.h>

void main()

{

            const MAX=0;

            int a,b;

            cin<<a>>b;

            if(a>b) MAX=a;

            for(x=0,x<MAX;x++) cout<<x;

}

• #include<iostream.h>

Main()

{

            int ch=9,sch=90;

            char S[2,2];

            if ch<=9

                        cout<<ch;

            for(int x=0;x<2;x++)

                        for(int y=0;y<2;y++)

                        {

                        if(y==0) S[x][y]=’A’;

                        else

                                    cout>>S[x][y];

                        }

            getch(); }

• Class X

{

            public:

                        int a,b;

                        void int(void)

                        {

                        a=b=0;

                        }

                        int sum(void);

                        int square(void);

            };

int sum(void)

{

                        return a+b;

}

int square(void)

            {         

                        return sum() *sum();

}

• include<iostream.h>

void main()

{

            int R; W=90;

            while W>60

            {

                        R=W-50;

                        switch(W)

                        {            20:cout<<”Lower range”<<endl;

                                    30: cout<<”Middle Range”<<endl;

                                    20: cout<<”Higher Range”<<endl;

                        }

            }

}

• #include<iostream.h>

main()

{

            int x[5],*y,z[5];

            for(i=0;i<5;i++)

            {

                        x[i]=I;

                        z[i]=i+3;

                        y=z; x=y;

            }}

• class ABC

{

            int x=10;

            float y;

            ABC(){ y=5; }

            ~AB?C() {}

};

void main()

{

            ABC a1,a2;

}