Tuesday, 2 May 2017

ENGLISH


CLASS XII A & XII B 

English Holiday Homework

1.Read the entire novel,  "The Invisible Man".

2.Go through the 'Letters to Editor' section of any English newspaper. Cut and paste in your homework book any 5 such letters that grabbed your attention.Supply your own heading.

3.Also, give special attention to articles related to any social problem , adolescents , education etc  when you read newspapers.


Friday, 28 April 2017

HINDI

कक्षा- 12 अ
1 निम्न्लिखित विषयों पर फीचर लेख लिखिए ।
1 भ्रष्टाचार की बढती हुई घटनाएँ ।
2 महानगरों मेंप्रदूषण की समस्या
3 गाँवों में फैलता फैशन ।
2 निम्न विषयों पर निबंध लिखिए ।
1 सबका साथ सबका विकास
2 ग्रामीण महिलाओं की समस्याएँ

3 हिंदी ह्रदय  की भाषा ।     

Monday, 24 April 2017

COMPUTER SCIENCE



COMPUTER SCIENCE HOLIDAY H.W

Write down the concept of classes & Objects given below in your H.W Notebook for revising
Concept of Class and Object in C++
Class -A class is a blue print for creating objects.
Definition:
A class is a group of objects which show a common property.
OR
A class is a collection of objects of similar type.Once a class is defined, any number of objects can be created which belong to that class.For example – Define a class to print the values of two numbers.
Class HelloWorld
{
    int one;
    int two;
    public:
    void setdata()
      {
        cout<<”enter two numbers”;
        cin>>one>>two;
      }
     void putdata()
      {
      cout<<one<<endl<<two;
      }
};
int main()
    {
     HelloWrold obj;
     Obj.setdata();
     Obj.putdata();
     return 0;
    }
Classes are generally declared using the keyword class, with the following format:
class class_name
{
access_specifier_1:
   member;
access_specifier_2:
   member;
...
};
Object -It may be defined as identifiable identity with some characteristics and behavior.
Syntax of creating Object:
Class_name Object_Name;
If we have class named AB then the Object of this class can be created using above syntax as
AB Obj;
Access Specifiers in C++
Declaration of class:
class CLASS_NAME
   {
   //Access Specifier
   Data Members
   
   Member Functions
   
   };
Data members are data type properties that describe the characteristics of a class. There may be zero or more data members of any type in a class.
  Member functions are the set of operations that may be applied to the objects of that class. It is the interface between the class members and object. It is always single it doesn’t make any copy. There may be zero or more member functions in a class.
  Program Access Level that control access to members from within the program. These access levels are private, protected or public. Depending upon the access level of  a class member , access to it is allowed or denied.
Class name that serves as a type specifier for the class using which object of this class type can be created.
For Example
 #include<iostream.h>
#include<conio.h>
  class sum   // class
   {
       int a,b,s;   //data members
       public:
       sum()    // constructor
           {
           a=10;
           b=20;
           }
   void show()  //member function
            {
              s=a+b;
              cout<<”sum of numbers is”<<s<<endl;
            }
   };
int main()         
 {
     sum obj;   //object of class
     obj.show();
     return 0;
 }
public, protected and private are three access specifiers in C++.

IF YOU DON'T SPECIFY ANY ACCESS SPECIFIER WITH A DATA MEMEBR OR WITH A MEMBER FUNCTION, THE ACCESS SPECIFIER FOR THOSE MEMBERS WILL BE  TREATED AS private BY DEFAULT.
The general form of class definition is given below.
 class class-name{
                   private:
                   Data Members/Member Functions
                   protected:
                   Data Members/Member Functions
                 
                   public:
                   Data Members/Member Functions
                 };
The class body contains the declaration of members (data and functions). There are generally three types of member in a class: private, protected and public which are grouped under three sections namely private: protected: and public:.
The private member can be accessed only from within the class and public members can be accessed from outside the class also. If no access specifier (public, protected or private) is specified then by default, members are private.
Private variables can only be accessed by the class 
 Class A
   {
        private:
        int x;
        public:
        void SetX(int n) { x = n; } //this is ok
   };
int main()
{
A aobj;
aobj.x = 0; //error because x is private and  not accessible outside  the class
}
Protected is similar to private but can also be accessed by inherited classes
 class A
 {
 protected:
 int x;
 public:
 void SetX(int n) { x = n; } // this is ok
 };
class B : public A
 {
 public:
 void ShowX() { cout << x << "\n"; }
// this is ok as x is protected member
 };
Public member can be accessed from outside the class
 Class A
     {
       public:
       int x       
       void SetX(int n) { x = n; } // <<< this is ok
     };
 int main()
 {
     A aobj;
     aobj.x = 0;
// Ok because x is public accessible outside  the class
 } 
 } 
Solve these questions
(a)  What is the difference between Global Variable and Local Variable?     2

(b)   Write the names of the header files to which the following belong:      1
(i)         strcmp()                                  (ii)        fabs()

(c)    Rewrite the following program after removing the syntactical errors (if any). Underline each correction.                                                                                         2

#include [iostream.h]
class PAYITNOW
{          
int Charge;
PUBLIC:
   void Raise(){cin>>Charge;}
   void Show{cout<<Charge;}
};
void main()
{
PAYITNOW P;
P.Raise();
Show();
}

            (d)       Find the output of the following program:                        3
                        #include <iostream.h>
                        struct PLAY
                        { int Score, Bonus;};
                        void Calculate(PLAY &P, int N=10)
                        {
                                    P.Score++;P.Bonus+=N;
                        }
                        void main()
                        {
                                    PLAY PL={10,15};
                                    Calculate(PL,5);
                                    cout<<PL.Score<<”:”<<PL.Bonus<<endl;
                                    Calculate(PL);
                                    cout<<PL.Score<<”:”<<PL.Bonus<<endl;
                                    Calculate(PL,15);
                                    cout<<PL.Score<<”:”<<PL.Bonus<<endl;
                        }

            (e)        Find the output of the following program:                                                                                                                                    2
                        #include <iostream.h>
                        #include <ctype.h>
                        void Encrypt(char T[])
                        {
                                    for (int i=0;T[i]!='\0';i+=2)
                                                if (T[i]=='A' || T[i]=='E') T[i]='#';
                                    else if (islower(T[i])) T[i]=toupper(T[i]);
                                                                        else T[i]='@';
                        }
                        void main()
                        {
                                    char Text[]="SaVE EArtH";//The two words in the string Text
//are separated by single space
                                    Encrypt(Text);
                                    cout<<Text<<endl;
                        }

(f)     In the following program, if the value of N given by the user is 15, what maximum and minimum values the program could possibly display?                                                                       2

#include <iostream.h>
#include <stdlib.h>
void main()
{
  int N,Guessme;
  randomize();
  cin>>N;
  Guessme=random(N)+10;
  cout<<Guessme<<endl;
}

(c)    Define a class TEST in C++ with following description:                                                                              4
Private Members
a.      TestCode of type integer
b.      Description of type string
c.       NoCandidate of type integer
d.      CenterReqd (number of centers required) of type integer
e.      A member function CALCNTR() to calculate and return the number of centers as (NoCandidates/100+1)
Public Members
·         A function SCHEDULE() to allow user to enter values for TestCode, Description, NoCandidate & call function CALCNTR() to calculate the number of Centres
·         A function DISPTEST() to allow user to view the content of all the data members
 (a)  What is the difference between Object Oriented Programming and Procedural Programming?                                                                                                                                2
(b)   Write the names of the header files to which the following belong:      1
(i)         frexp()             (ii)        isalnum()

(c)    Rewrite the following program after removing the syntactical errors (if any). Underline each correction.                                                     2

#include <iostream.h>
struct Pixels
{           int Color,Style;}
void ShowPoint(Pixels P)
{           cout<<P.Color,P.Style<<endl;}
void main()
{
            Pixels Point1=(5,3);
            ShowPoint(Point1);
Pixels Point2=Point1;
            Color.Point1+=2;
ShowPoint(Point2);
}
            (d)       Find the output of the following program:                                    2
                        #include <iostream.h>
                        struct Game
                        {
                                    char Magic[20];int Score;
                        };
                        void main()
                        {
                                    Game M={“Tiger”,500};
                                    char *Choice;
                                    Choice=M.Magic;
                                    Choice[4]=’P’;
                                    Choice[2]=’L’;
                                    M.Score+=50;
                                    cout<<M.Magic<<M.Score<<endl;
                   Game N=M;
                                    N.Magic[0]=’A’;N.Magic[3]=’J’;
                                    N.Score-=120;
                                    cout<<N.Magic<<N.Score<<endl;
                        }

(e)In the following program, if the value of N given by the user is 20, what maximum and minimum values the program could possibly display?                                                                       2

#include <iostream.h>
#include <stdlib.h>
void main()
{
  int N,Guessnum;
  randomize();
  cin>>N;
  Guessnum=random(N-10)+10;
  cout<<Guessnum<<endl;
}
*****************************************************************************



BIOLOGY

Study Material: Class- XII

1. Reproduction in Organisms: Click
2. Sexual Reproduction in Flowering Plants: Click 
3. Human Reproduction: Click 4. Reproductive Health: Click
5. Principles of Inheritance & Variation: Click
6. Molecular Basis of Inheritance: Click 7. Evolution: Click
8. Human Health & Diseases: Click
9. Strategies for Enhancement in Food Production: Click
10. Microbes in Human Welfare: Click
11. Biotechnology: Principles & Processes: Click
12. Biotechnology: Applications: Click
13. Organisms & Population: Click 14. Ecosystem: Click
15. Biodiversity & Conservation: Click 16. Environmental Issues: Click
Study Material: Class-XI
Biology Class Work Unit-I (L-1 to L-4): Click
Biology Class Work Unit-II: Click
Biology Class Work Unit-III: Click
Photosynthesis to Chemical Co-ordination: Click




HOLIDAY HOME WORK ASSIGNMENT---2017-18
CLASS:12.A    SUB: BIOLOGY

1.       1. SELF STUDY AND NOTE MAKING –CHAPTERS:   13 & 14
2.       2. EXERCISE QUESTIONS FROM CHAPTER: 3