ICSE Board Class 10 Computer Science Sample Papers 2011

SAMPLE PAPER                                                                      
COMPUTER SCIENCE

CLASS 10

Answers to this Paper must be written on the paper provided separately.
You will not be allowed to write during the first 15 minutes.
This time is to be spent in reading the question paper.
The time given at the head of this Paper is the time allowed for writing the answers.
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
(a)     Name any four tokens of Java. [2]
(b)     Give the difference between actual parameter and formal parameter. [2]
(c)     What is an identifier? [2]
(d)     Write an expression in Java for     cos x   +    a b
(e)     What is the result produced by    2 – 10*3 + 100/11?   Show the steps.              [2]

Question 2
(a) What is the difference between local variable and instance variable? [2]
(b)     int  x =20,  y = 10, z;  What is the value of z in
          z =  ++x * (y – –) – y ?
          Show the steps. [2]
(c)     What is the purpose of default in a switch? [2]
(d)     Give the difference between linear search and binary search. [2]                                                                                                        
(e)     What will be the output of the following code?
         float x = 7.87;
  System.out.println(Math.ceil(x);
   System.out.println(Math.floor(x); [2]
                              
Question 3
(a)     State the difference between if-else if ladder and switch...case. [2]
(b)    Explain the concept of constructor overloading with an example. [2]
(c)     What will be the output of the following program segments?
(i) String s = “application”;
 int p = s.indexOf(„a‟);
 System.out.println(p);
 System.out.println(p+s); [2]
(ii) String st = “PROGRAM”;
System.out.println(st.indexOf(st.charAt(4))); [2]
(iii) int a = 0;
if(a>0 && a<20)
   a++;
   else a-- ;
   System.out.println(a); [2]
(iv) int a= 5, b = 2,c;
if (a>b || a ! = b)
c = ++a+--b;
System.out.print(c+ “ ”+a+ “ ”+b); [2]
(v) int i = 1;
while(i++<=1)
{
i++;
System.out.print(i + “ ” );
}
System.out.print(i); [2]                                                                         
(d) Differentiate between isUpperCase(char) and toUpperCase(char). [2]
(e) What is the difference between a constructor function and a member
function of a class? [2]
(f) What is the difference between a static member function and a member
function which is not static? [2]

SECTION B (60 Marks)
Attempt any four questions from this Section.
The answers in this Section should consist of the Programs in either Blue J environment
or any program environment 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.
Question 4
Define a class taximeter having the following description:
Data members/instance variables  
int   taxino      -  to store taxi number
String name    -  to store passenger's name
int  km            -  to store number of kilometres travelled
Member functions:
taximeter() -- constructor to initialize taxino to 0, name to “  ”and b to 0.
input() - to store taxino,name,km
calculate() - to calculate bill for a customer according to given conditions
kilometers travelled(km)                     Rate/km
1 km                                                  Rs 25
1    km   6                                         Rs 10
6  <  km   12                                        Rs 15
12 < km   18                                       Rs 20
>18  km                                                 Rs  25
  display()- To display the details in the following format  
Taxino              Name        Kilometres travelled       Bill amount
     -                        -                             -                                  -
Create an object in the main method and call all the above methods in it. [15]                                                                                                       

Question 5
Write a menu driven program to find the sum of the following series depending on the
user choosing 1 or 2
1. S=1/4+1/8+1/12.........upto n terms
2. S=1/1!-2/2!+3/3!.......upto n terms
where  ! stands for factorial of the number and the factorial value of a number is the
product of all integers from 1 to that number, e.g. 5! = 1  2  3  4  5.
(use switch-case). 

Question 6
Write a program to accept a sentence and print only the first letter of each word of the
sentence in capital letters separated by a full stop.
Example : 
INPUT SENTENCE :        “This is a cat” 
OUTPUT :                           T.I.A.C. [15]
Question 7
Write a program to create an array to store 10 integers and print the largest integer and
the smallest integer in that array. [15]
Question 8
Write a program to calculate the sum of all the prime numbers between  the range of   
1 and 100. 
Question 9
Write a program to store 10 names in an array.  Arrange these in alphabetical order by
sorting.  Print the sorted  list.    Take single word names, all in capital letters,                 
e.g. SAMSON, AJAY, LUCY, etc. [15]