DLF PUBLIC SCHOOL
Holiday Homework
Class : XII
Sub: Psychology
Develop a case profile of an individual who has excelled in areas like sports, academics, music etc or
having special needs like learning disability , autism etc. or those with interpersonal social problems i.e
poor body image, obesity , temper tantrums , not getting along with peers, withdrawn etc.
Find the background information and development history of the individual.
Sub: Biology
Prepare an investigatory project on any topic of your own choice , given in your syllabus in which you are
confident and prepare for viva voce . Marks obtained will be added in Terminal I Practical exam.
NOTE : The same project will be submitted at the time of Board practical exam.
Guidelines :
1. Project should be made on A 4 sized colored sheets and the same should be kept in cellophane sheets.
2. Sheets should be arranged in following order.
a) Aim / Title Page
b) Certificate
c) Acknowledgement
d) Index
e) Main content
f) Bibliography
NOTE : If topic has been taken from medical field, a separate case history should be attached.
Sub: Business Studies
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Collect the data of any 10 companies who have taken the ‘ First mover advantage ‘ to capture the
market ( for example :Sun silk for explaining why conditioner is used ? ) support your data with
clipping from newspaper , magazines and other related material. Do it in your Business Studies
note book.
Choose the topic of your choice for CBSE Business Studies project file and collect information to
be discussed and used in the file.
Criteria :
 Originality -1/2
 Creativity – 1 ½
 Content – 1 ½
 Presentation – 1½
 Analysis- 1 ½
Sub: Chemistry
1. Do the assignments given on unilrn.
2. Complete your investigatory project PPT for CBSE.
Slides should be arranged in following order.
a) Aim / Title Page
b) Certificate
c) Acknowledgement
d) Index
e) Main content
i) Theory
ii) Materials Required
iii) Experimentation( Video)
iv) Observation & calculation
f) Result/ Conclusion
g) Reference/Bibliography
3. Science month activity – “ Risk Evaluation “ of metal in food .
Topic : “ Risk assessment of using aluminum foil in cooking “ - group activity ( 4- 5).
The marks of this activity would be included in chemistry practical.( Weight age =10 Marks).
Steps to be followed :
1. Hazard identification ie leaching of Al either by dose response analysis or exposure quantification.
2. Who might be harmed and how ?
3. Evaluate the risk by experimental data.
4. record your findings / implementation.
5. Explain the chemistry of leaching.
6. Decide the precautions.
Criteria :
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Content [3]
Presentation [2]
Supporting aid [3]
Team work [2]
Sub: Computer Science
Programming Language - C++
Q.1What is an abstract class ? How is it different from a concrete class?
Q.2 What is OO Paradigm? How is it different from Procedural Programming Paradigm?
Q.3 What is polymorphism ?Give an example in C++ to show how it is implemented in C++?
Q.4 What is inheritance? Give an example in C++ to show how it is implemented in C++?
Q.5 What are the advantages of OOP over traditional programming approach?
Q.6 What are the disadvantages of using OOP?
Q,.7 What is concept of simplifying a real worlds concept into essential elements called in OOP?Explain
this feature?
Q,.8 What is most fundamental approach of combining data and its associated operations called in
C++.Explain this feature?
Q.9 What is a class? What is need of classes in C++?
Q.10 Which functions in classes in C++ are inline by default. What is significance of these functions?
Q.11.What happens if no constructor is provided by the user in a class .
Q.12 When is memory allocated to a constructor?
Q.13 Reusability of classes is one of the major properties of OOP. How is it implemented in C++?
Q.14 Define a class hotel with the following specifications :
Private members :
Roomno
integer
Name
string
Charges_day float
No_of_days
integer
Compute() -To calculate and return the total charges as charges_day *No_of_days
Public members :
Getit()
-to enter the data members
Showit() to show the data member
A constructor function to initialize the data members.
Q.15 Define a class Stock with the following specifications :
Private members :
Itemno
Item Name
Price,qty,total ,discount
integer
string
float
Compute() -To calculate and return the total .Find discount as
If qty >=50
discount=10%on total amount
If qty<50
discount =nil
Public members :
Getit()
-to enter the data members
Showit() -to show the data member
A constructor function to initialize the data
Q.16 CONSIDER a class Item with the following specifications :
Class Item
{ private :
int
Ino ;
char IName[25];
float Price
public:
Item();
//f1
Item (int n,char nm[25],float rate);
//f2
Item(Item &obj);
//f3
};
a) Write function definitions for all the member functions.
b) Name the feature of OOP implemented in above class.
c) Write the constructor invocation statement for the above functions.
Q.17 CONSIDER a class emp with the following specifications :
Class emp
{ private :
int eno ;
char eName[25];
float sal;
public:
emp();
//f1
emp (int n,char nm[25],float sal);
//f2
emp(emp &E);
//f3
};
a)
b)
c)
What are member functions f1..f3 called in C++.
Name the feature of OOP implemented in above class.
When and how the above functions are invoked .
Q.18 CONSIDER a class Movie with the following specifications :
Class
{ private :
int Mno ;
char Mname[25];
int no_cdl;
public:
Movie();
//f1
Movie (int n,char nm[25],float sal);
//f2
Movie (Movie &m);
//f3
};
a) What are member functions f1..f3 called in C++.
b) Name the feature of OOP implemented in above class.
c) When and how the above functions are invoked .
Q.19 CONSIDER a class Result with the following specifications :
Class Result
{ private :
int Rno ;
int mks;
public:
Result();
//f1
Result (int rn,int marks);
//f2
~ Result( );
//f3
}
a) What are member functions f1..f3 called in C++.
b) Name the feature of OOP implemented in above class.
c) When and how the above functions are invoked .
Q.20 CONSIDER a class Candidate with the following specifications :
Class Result
{ private :
int Cno ;
char Name[20];
int mks;
public:
Candidate();
//f1
Candidate(int Cn,char nm[20],int marks);
//f2
~ Candidate( );
//f3
};
a)
b)
c)
What are member functions f1..f3 called in C++.
Write definitions for all functions.
Create an object for f1 and f2 to invoke them.
Q21. Develop a program in C++ to create a database of the following items:
Base class : Person
data members: name of the patient, age of the patient, sex
member functions : read_p(), display_p()
Base class : Hospital
data members : bed number, nature of illness
member functions : read_h(), display_h()
Derived class : Patient
data members : date of admission.
member functions : read () , display()
Project Work for FINAL BOARD EXAMS ( So start thinking on it…..)
System –
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Student Information System,
School Accounting System ,
School Attendance System,
School Payroll System,
School Library Management,
School Admission System,
School Examination System,
Banking,
ATM ,
Shopping Mall ,
Railway Reservation,
Hotel Reservation, etc.
Data collection and analysis :
Choose any system as your project for XII (a batch of three maximum)
 Collect data about the system (bills,reports,register)
 Analyse the inputs and outputs
System development (coding):
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Define the classes with appropriate data members (Minimum two classes).
Write main program for function calling.
Note : Project is to be mailed to the e-mail id : rani_myid @ yahoo.co.in . Your Project should cover
the following specifications :
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Project Title(name of project,rollno, class)
Acknowledgement
Certificate
Introduction to project
Software and hardware required(Operating system also)
Project coding
Project screens(output)
Bibliography
Sub: Accountancy
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Prepare the Accountancy project file for CBSE examination as discussed in class.
Worksheets
`
Sub: Economics
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Worksheets of the chapters already done in the class to be completed , based on HOTS and value
Based Questions.
Mathematics Holiday Homework
Practice Makes man perfect
Make a Separate register for the holiday home work and do all the questions chapter wise as
given and attempt self evaluation test after practice questions.
Time Required : 2 hrs per day
Relations and Functions
1. If A and B are two sets such that n (A) = m and n (B) = n then write number of function
from A → B.
2. Let set A contains 3 elements. Write the total number of binary operation possible.
3. If : R → R ,a,b,c,d є R such that (a,b) *(c,d) = (ac, b + ad) Find the identity element of the
function.
4. Let * be a binary operation defined by a * b =2ab-7. Is * associative?
5. Let * be the binary operation on N defined by a*b = a+b+10 for all a, b є N and if 3*p=15
then find p.
6. Let
and
. Find
7. Show that the relation are in the set a = {x : x є w, x ≤10}given by
is an equivalence relation , find the elements related to 3.
8. Let
be a function defined as
, find f-1 : Range of
.
9. Let A =NxN and Let * be a binary operation on A defined by (a,b)*(c,d) = (ad+bc,bd) for
all (a,b),(c,d) € NxN. Determine if * is commutative, associative,
10. Let A = {-1,0,1,2}, B = { -4,-2,0,2} and f , g : A →B be the function defined by f(x) = x2
– x , x ε A and g(x) = 2| x - 1/2 | , x ε A ; are f and g equal. Justify your answer.
Inverse trigonometry
Prove the following
I.
II.
III.
IV.
Q1.
Q2.Find the Value of i.
ii.
Q3.Write the following in simplest form : i .
Q4.Simplify
ii .
.
Q5.Find the principal value of : i.
ii
Q6. Simplify
Q7.Solve: (i).
.
Q8.
Q9.
Q10.
Matrices and Determinants
1. Find x,y,z if
2. If
= Show that
3. Using properties of determinants solve for x
4. Using properties prove that :
5. Usining properties of determinants,prove that:
and hence find A-1.
:
6. Find
, find a and b such that A2 + aI = bA such that where I is unit matrix of order
2.
7. Prove using properties of determinants
8. Solve the equations by matrix method
9. If
find and use it solve the system of equations:
10. Find the value of
for which given homogeneous system of equations have non trivial solution.
Also find the solution.
11. If
Using A-1 solve the system of linear equations:
12. If
to solve the following system of equations:
find the product AB and use this result
13. Solve using matrices:
14. For what value of a and b, the following system of equations is consistent?
15. Using the properties of determinants; show that
.
Show that (a+b+c) and (a2+b2+c2) are the factors.
16. For the determinant
17.
.
18.
.
19.
.
20.
.
21.
.
22.
.
.
23.
.
24. If a, b, c are reals, and
Show that either a + b+ c =0 or
a = b = c.
Continuity & Differentiability
1. Differentiate w.r.t x
2. Differentiate y = ax + xa + aa + xx w.r.t. x.
3. Differentiate
w.r.t.x for x>0, a>0.
4. Differentiate
w.r.t.x
5. Find
6.
7. Prove that
8. If
Show that
9. If
10. If y =
prove that
11. If
12. Find
if
13. Find
if y = x log (logx)
14. If Sin y = x sin ( a + y ) , with Cos a ≠ 1, P.T
15. If y = acos(logx) +bsin(logx). S.T. x2 y2 + xy1 + y = 0.
+ sinx = 0
16. If
, show that (1+x2 ) y2+(2x-1)y1=0.
17. If
, show that (1-x2 )y2 -xy1 = 0
18. If
show that (1-x2 )y2 -xy1-m2 y =0 .
19. If y = 3e2x+2e3x, then prove that y2 - 5y1 + 6y = 0
20. If y = sin
. S.T. (1-x2)y2-xy1+ m2 y =0.
21. Find the value of a and b so that
22. Determine the value of ‘a’ so that
f(x) =
23. If f ( x ) =
24. Show that f(x) =
is continuous at x = 0
is continuous at x = π / 2
is continuous but not differentiable at x = 2.
25. Discuss the differentiability of f(x) =
Application of derivatives
1.
2.
3.
4.
5.
6.
7.
8.
9.
10. Verify Rolle’s Thm. for the function f ( x)  x2  5x  7 in the interval [1, 4]
11.
12.
13.
14.
15.
Holiday Homework
Class: XII
Sub: Physics
NUMERICAL QUESTIONS
Holiday Homework
Class:XII
Sub: English
TASK -1
Reading newspaper has always been considered a life skill , a need , a part of a man making process. It
plays a paramount role in making you a different person, if you sincerely inculcate the habit of reading
them every day. Experience the enchantment & explore your creativity while creating newspaper of your
own.
Create a colorful, attractive newspaper on a foolscap ( size of a newspaper) using both sides. Provide a
name to your newspaper.
The columns should contain
1. School news from website/ School Almanac or related articles or suggestions from these.
2. Posters or advertisement related to social issues.
3. Report writing of any event/ incident of the school or outside it.
4. Article on ‘ Holiday Special ‘ – Write an interesting article about the importance of holidays. The
write up can be accompanied by photographs that you have clicked. Log on to
www.pil.network.com  Tools Auto Collage.
Auto Collage is one of the versions provided at the above site which can automatically assembles
your photographs in a collage form. Get a printout & paste in your newspaper.
5. Other miscellaneous items for fill ups like Display advertisements , Sports, News, or Interview
with Celebrities, Vocab Game , Puzzles/ Crosswords .
Self asses your activity using the following criteria :
 Design & layout
[2]
 Originality & use of Auto Collage
[3]
 Richness of language
[3]
 Logical presentation
[2]
TASK – 2
Movies are all time favorite pass time. Need to have a break from the monotony, so children prepare a
film review on the movie ‘ Jalpari ‘ which you have already watched in the school auditorium. Prepare
this review for a column in the newspaper as a report.
Self assess your activity using the following criteria :
 Accuracy of language
[2]
 Originality & use of new vocabulary
[2]
 Clarity & fluency of the language to be maintained
[2]
 Mention the values extracted
[2]
 Brevity of the content
[2]
Sub : Physical Education
Project : IPL Cricket 2013