Sample Paper – 2011
Class – X
Subject – Computer Applications
Class – X
Subject – Computer Applications
Time: 2 Hrs. FM:
100
This paper is divided into two Sections
Attempt all
questions from Section – A and any four from Section – B
The
intended marks for each question is provided within the ( )
Section – A (40 Marks)
Attempt all questions from this section
Question 1 (2x5=10)
a) Name any
two types of Java programs.
b) State the
difference between a Constructor & a Method.
c) What does
the following mean? Also state the significance of the constant ‘99’.
Ferrari F50 = new Ferrari (99);
d) State the
difference between an ‘Instance Variable’ & ‘Class Variable’
e) What is a
Wrapper class? Give 2 examples.
Question 2 (2x5=10)
a) Differentiate
between ‘Operator’ & ‘Expression’
b) What is the
value of ( (1.0 / 0.0) – (1/ – 0.0) ).
c) Give one
difference & one similarity between ‘switch case’ and ‘if…else’.
d) How many
times does the loop iterate? Also give the output for the following code
snippet.
int x;
for(x = 1; x< =10; x + +)
{
x + +;
System.out.println(x + +);
}
e) What is the
difference between ‘= =’ and ‘equalsIgnoreCase( )’
Question 3 (2x5=10)
a) If the
value of a = 3, what does the expression below evaluate to,
a + = a + + + + + a + a;
System.out.println (a);
b) Find error
in the following code snippet,
int a; b ;
for (a=1; b=1;a<=10;a++;b++)
{ …
<Statements>
…}
c) Give the
output after invocation of the following method,
i.
x (28,29)
ii.
x (27,39)
public boolean x (int a, int b)
{
boolean c = false;
while (a>1 && b>1)
{
if (a>b)
a – = b;
else
b – = a;
}
if (a = = 1 || b = = 1)
c
= true;
return
c;
}
d) Evaluate
the following if the value of n = 400,
n – –;
m = n= =399?3:99;
Transform
the above Conditional Statement into if…else statement.
e)
What is the
output of the following
char chars [ ] = {‘c’, ‘h’, ‘a’, ‘r’};
String s = new String (chars);
String strng = s;
System.out.print (strng);
System.out.print (strng.concat(“s”));
Question 4 (2x5=10)
a) 
i. Write the Java expression for
the following: y = tan (log (Ö13x9
) )
i. Write the Java expression for
the following: y = tan (log (Ö13x9
) )
ii.
Evaluate the following if the value of x = 10 and y = 21,
System.out.println (Math.sqrt((Math.pow((double)(Math.abs(Math.max(Math.min(x,
y),y))),4))));
b) int x = 10,
y = 21;
System.out.println(x&y);
System.out.println (x|y);
System.out.println(x/y);
System.out.println(x>>(y – x –
x));
c) String s1 =
“MINORITY”;
String s2 = “REPORT”;
i.
System.out.println(s1.substring(0,3).concat(s2.substring(3,5))
ii. System.out.println(s2.substring(2));
iii. System.out.println(s2.replace(‘p’
, ‘s’));
iv. System.out.println(s1.charAt(s1.indexOf(‘R’)
+ s2.indexOf(‘R’)));
d) Give any
three uses of break statement.
e) How are the
following passed to a method?
i)
Primitive type
ii) Reference
type
Section – B (60 Marks)
Attempt any four questions from this section
The answers in this section should consist of programs in either Blue – J
environment or any other environment with Java as the base. Each program should
be written using Variable Description / Mnemonic Codes such that the logic of
the program is clearly depicted.
Flowcharts and Algorithms
NOT required
Question 5 [15]
Write a
program to enter a line of text from the user, extract each word and put them
inside a String type array and sort the array in alphabetical order (Lexicographically) and re-display the
array elements.
Question 6 [15]
Write a
program to input multiple digited numbers in a single subscripted array of size
10 in the main ( ) method. Pass the array into a function named void remove_sort( ) that will remove
the zeros from each array element and sort the array elements in ascending order using Selection Sort Technique,
and re-display the elements within the same method.
Question 7 [15]
A company
has employees, who are divided into four grades depending on their Basic pay
per month as follows,
Basic(Rs./month)
Grade DA HRA
10,001 or
more 1 40%
30%
5,001 to 10,000 2 40% 25%
2001 to 5,000 3 30% 20%
2,000 or less 4 30% 15%
5,001 to 10,000 2 40% 25%
2001 to 5,000 3 30% 20%
2,000 or less 4 30% 15%
If the Net
salary which is the total of Basic, DA, and HRA, is above Rs.50, 000 per month
then Income Tax at the rate of 30% of the annual salary exceeding 50,000 is
deducted on monthly basis. Taking name of the employee and the Basic (monthly)
pay as inputs, prepare & print a pay slip, which contains Name, Grade, Basic monthly pay, DA, HRA,
Monthly Income Tax and Net Monthly Salary, for employee.
Question 8 [15]
Write a
program in Java to accept a line of text from the user and create a new word
formed out of the first letter of
each word. After creating the new word reverse
it and check whether it is a Palindrome
or not.
E.g. If the
user enters Mangoes Are Delivered After Midnight
Output:
MADAM
Reverse:
MADAM
Yes, it is
a Palindrome
E.g. If the
user enters A Brick In The Wall
Output:
ABITW
Reverse:
WTIBA
No, it is
not a Palindrome
Question 9 [15]
1.
Write a program to generate the sum of the following series
2.
Write a program to generate the following pattern
A *
B
*C *
D
*E *F *
G
*H *I *J *
K
*L *M *N *O *
Question 10 [15]
Create overloaded
methods named void calc_volume ( ),
that has been overloaded to perform the following functions
·
Volume of Sphere
·
Volume of Cylinder
·
Volume of Cone
Write a menu driven program in Java
to display the above 3 menus and execute the overloaded methods and
display the volume in the respective functions,
calc_volume (double) for sphere,
calc_volume (double, double) for
cylinder and
calc_volume (float, float) for cone.
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