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Guess Paper – 2010
Class – X
Subject – Computer Applications
Section A
(40 marks)
Attempt all
questions
(Each questions carries 2
marks of Sec-A)
1)
a) Why is type casting
required? Give one example.
b) Explain the need of
‘super’ keyword?
c) Give tow
similarities between constructor and method.
d) Elements of an
sorted array is given
4,6,12,34,56,78,122, 345
To search the
element 78 how many iteration is required if Binary search
method
is used?
e) What is temporary
instance?
2)
a) Differentiate between
final and finally.
b) Differentiate between
operator associativity and operator precedence.
c) Give the Unicode
value for ‘t’ and ASCII value for ‘T’.
d) Find out the error if
found for the following code fragment and which property is
violating
here?
class a
{
public void f()
{
int p=5;
{
int x=10;
}
int y=p+x;
}
}
e) Why are compiler and
interpreter required to run java program?
3)
a) class abc
{
public void f()
{
int a=5;
System.out.print(a);
}
}
Find out four
types of token if found above program code
b) System.out.print(((int)Math.pow(4,1/2))/2+Math.PI);
c) How are access
specifiers related with inheritance?
d) Give the output for
following program code
class wisdom
{
public static
int a;
wisdom(int v)
{
a=v;
}
public static
void show()
{
System.out.print(“\n”+a);
}
public static
void main(String args[])
{
wisdom
obj1=new wisdom(5);
obj1.show();
wisdom
obj2=new wisdom(50);
obj1.show();
obj2.show();
}
}
e) Write code fragment
to display the sum of ASCII values for the text “I<c@S>e“
(not whole program)
4)
a) Differentiate between
function overloading and overriding?
b) Differentiate between
‘package’ and ‘extends’ keywords
c) Differentiate between
‘throw’ and ‘throws’ keyword.
d) Why is wrapper class
required?
e) Give one difference
of String and StringBuffere class and give one
example of method
for both classes.
SEC-B
Attempt any 4 questions from this section
The answer in this Section should consist of the programs
in either BlueJ
environment
or
any other program
environment or
with Java as the base. Each program should be written using
Variable Descriptions/Mnemonic Codes such that the logic of
the program is clearly depicted. Flow charts and algorithms
are not required.
5) Design class School
Data Members
int roll
//to store roll number
String name
//to store name of student
String class
//to store class
float fee
// to store fees without discount
String dt
// to store the date [dd-mm-yyyy format] of fees given
Member Functions
School(float f)
// to initialize total fee without discount as Rs.1000/-
void getInfo() //
to accept student details
float dicountCal() // to
calculate discount
range of
date discount on total fee
Jan-March 15%
April-June 10%
Jul-Sep 8%
Oct-Dec Add 5% extra with
fees
Void Diplay()
//to display student details and fees to be paid
Write main() method.
6) Write a program to
accept a line of text and replace with all the vowels with
next
vowel and continue
this process in cyclic order as given below.
A -> E
E ->I
I ->O
O ->U
U ->A
Applicable for lower
case vowel also
Example :
Salt LakE City is Your
Output : Selt
LekI Coty os Yuar
7) Write a program to
accept n number of elements and sort from 4th to 10th
elements
using bubble sort method
in ascending order. Use try-catch (do not use throws
IOException)Assume n>=11
8) Write a program to
accept roll, name ,total marks for n number of students and
display
all the records on
alphabetical order on name (A-Z) as following format by using
selection sort method.
Assume that totals
marks to be accepted for 5 subjects and if any student get
marks <40% and add sufficient grace marks to pass them.(You
need not accept marks of 5 subjects , only accept total
marks.(Total marks is 500 and each subjects carries 100 marks
and pass marks is 40% of total marks)
Roll
name total
9)
Write a program to accept an integer number and check the
number palindrome or not except last and first digits , if it
is palindrome then display the sum of first and last digits
else display maximum and minimum digits of the original
number.
Example-1
If n= 23436,
As is 343 is palindrome so, 2+6=8
Example -2
If n= 346824
As 4682 is not palindrome, maximum digit=8, minimum digit==2
10)
Write a program calculate electricity bill by using following
slab
Unit consumed
rate/unit and power saving gift
1-50
Rs.1.50/-, gift=”Watch’;
50> but
<=150 Rs.
2.25/-, gift=”Calculator”;
>150 but <=300
Rs. 3.20/-, gift=”Ball Pen”;
Above
Rs. 4.50/-, gift=”Save Energy Slip”
Calculate the bill and gift for 100 consumers count total no.
of Watch, Calculator, Ball Pen are requird
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