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ICSE Paper – 2015
Class – X
Subject – Computer Applications
Class – X
Subject – Computer Applications
(Class:
X)
(Two Hours)
Answer to this paper must be written on the paper
provided separately.
This paper is divided into two sections.
Attempt ALL questions from Section
A and any FOUR questions from Section B.
The intended marks for questions or parts of questions
are given in brackets [ ].
SECTION A (40 Marks)
Attempt ALL questions.
Question 1. [2x5=10]
a) What are the default values of
primitive data type int and float.
b) Name any two OOPs principles.
c) What are identifiers?
d) Identify the literals listed below:
i) 0.5 ii)
‘A’ iii) false iv) “a”
e) Name the wrapper classes of char type
and Boolean type.
Question 2. [2x5=10]
a) Evaluate the value of n if value
of p=5, q=19.
int
n = (q-p)>(p-q)?(q-p) : (p-q);
b) Arrange the
following primitive data types in an ascending order or their size:
i) char ii) byte iii)
double iv) int
c) What is the
value stored in variable res given below:
double res =
Math.pow(“345”.indexOf(‘5’), 3);
d) Name the two
types of constructors.
e) What are the
values of a and b after the following function is executed, if the values
passed are 30 and 50;
void paws(int a,
int b)
{
a = a + b;
b = a – b;
a = a – b;
System.out.println(a+ “,”+b);
}
Question 3. [2x10=20]
a) State the data
type and value of y after the following is executed.
char x = ‘7’;
y =
Character.isLetter(x);
b) What is the function of catch block in
exception handling? Where does it appear in a program?
c) State the output when the
following program is executed?
String
a = “Smartphone”, b = “Graphic Art”;
String
h = a.substring(2,5);
String
k = b.substring(8).toUpperCase();
System.out.println(h);
System.out.println(k.equalsIgnoreCase(h));
d) The access specifier that gives
the most accessibility is ________ and the least accessibility is _____________.
e) (i)
Name the mathematical function which is used to find sine of an angle
given in radians.
(ii) Name a string
function which removes the blank spaces provided in the prefix and suffix of a
string.
f) (i)
What will this code print ?
int
arr[] = new int[5];
System.out.println(arr);
i) 0 ii) value stored in arr[0] iii)
0000 iv) garbage value
(ii) Name the
keyword which is used to resolve the conflict between method parameter and
instance variables /fields.
g) State the
package that contains class:
(i)
BufferedReader.
(ii) Scanner.
h) Write the output of following
program code:
char ch;
int x = 97;
do
{
ch = (char)x;
System.out.println(ch + “ ” );
if(x % 10 == 0)
break;
++x;
} while (x
<= 100);
i) Write the java expression for :
a2 + b2
2ab
j) If int y=10 then find int z = ( ++y * (y++ +5) );
SECTION B (60 Marks )
Attempt any four questions from this
Section.
The answers in this section should consist of
the program in Blue J environment with Java as the base. Each
program should be written using Variable descriptions / Mnemonics Codes such
that the logic of the program is clearly depicted.
Flow-charts and Algorithms are not required.
Q4. Define a class called ParkingLot with
the following description: [15]
Instance variables/data members:
int vno - to store
the vehicle number
int hours -
to store the number of hours vehicle is parked.
double bill - to store
the bill amount
Member Methods:
void input() - to input and store the vno and hours.
void calculate() - to compute the parking charge at the
rate of Rs3 for the first hour of part thereof , and Rs 1.50 for each
additional hour of part thereof.
void
display() - to display the details:
Write a main method to
create an object of the class and call the above member methods.
Q5. Write two separate programs to
generate following pattern using iteration (loop) statements. [15]
a)
* b)
5 4 3 2 1
* # 5 4 3 2
* # * 5 4 3
* # * # 5 4
* # * # * 5
Q6. Write a program to input and store
roll numbers, name and marks in three subjects of n number of students in five
single dimentional array and display the remark based on average marks as given
below: [15] (The maximum marks in the
subject are 100)
Average marks = total marks / 3
Average marks Remarks
85 – 100 Excellent
75 – 84 Distinction
60 – 74 First
Class
40 – 59 PASS
Less than 40 POOR
Q7. Design a class to overload a function Joystring()
as follows: [15]
(i) void Joystring(String s, char ch1, char
ch2) with one string argument and two character arguments that replaces the
character argument ch1 with the character argument ch2 in the given string s
and prints the new string.
Example: Input value of s = “TECHNALAGY”
Ch1 = ‘A’ and ch2 = ‘O’
Output = “TECHNOLOGY”
(ii) void Joystring(String s) with one
string argument that prints the position of the first space and the last space
of the given string s.
Example: Input value of s = “Cloud
computing means Internet based computing”
Output:
First index: 5
Last index: 36
(iii) void Joystring(String s1, String s2)
with two string arguments that combines the two strings with a space between
them and prints the resultant string.
Example:
Input value of s1 = “Common Wealth”
Input value of s2 = “Games”
Output: Common Wealth Games
(Use
library functions)
Q8. write a program to input twenty names
in an array. Arrange these names indescending order of alphabets, using the
bubble sort technique. [15]
Q9. Using switch statement, write a menu
driven program to: [15]
i)
To find and display all the factors of a number input
by the user (including 1 and excluding number itself ).
Example: Sample input n = 15
Sample output: 1, 3, 5
ii)
To find and display factorial of a number input by the
user ( the factorial of a non-negative integer n, denoted by n!, is the product
of all integers less than or equal to n.
Example: Sample input: n = 5
Sample output: 5! = 1x2x3x4x5 =
120
For an incorrect choice , an appropriate error message should be
displayed.
