Saturday, March 15, 2014

ICSE computer applications 2014 board paper


ICSE Java Complete Reference book is currently available as print on demand and can be bought from online stores. Please check the discounts offered by different websites. third edition of book (2014 release) includes 2014 board paper solution.


Good news!!


Discount is offered on 25+ copies. For more details write to info@pothi.com 

Additionally: Complimentary shipping for 25+ copies in a single order to a single address within India.
Note: No further negotiation in terms of discount will be possible with Pothi.com as  discounts are standard.


1.    Pothi.com:
2.    infibeam :
3.    flipkart : 
4.    homeshop18 : 
5.    Amazon India : 
6.    dial a book : 


ICSE Paper – 2014
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) Which of the following are valid comments?                           
i)                   /* comment */
ii)                /* comment
iii)              // comment
iv)              */ comment */
b) What is meant by a package? Name any two Java Application Programming Interface packages.                                                                                                                      
c) Name the primitive data type in Java that is:                                        
             i)    a 64 bit integer and is used when you need a range of values wider than those provided by int.
             ii)   a single 16 bit Unicode character whose default value is ‘\u0000’.
d) State one difference between floating point literals float and double.         
e) Find the errors in the given program segment and re-write the statements correctly to assign values to an integer array.                                  
          int a = new int (5) ;
          for(int i=0;i<=5:i++)a[i]=i;             

Question 2.                                                                                        [2x5=10]
a)  Operators with higher precedence are evaluated before operators with relatively lower precedence. Arrange the operators given below in order of higher precedence to lower precedence.                                         
i)                   &&
ii)                %
iii)              >=
iv)              ++




b) Identify the statements listed below as assignment, increment, method invocation or object creation statements.
i)                   System.out.println(“Java”);
ii)                costPrice = 457.50;
iii)              Car hybrid = new Car();
iv)              petrolPrice++;
c) Give two differences between switch statement and if-else statement.
d) What is an infinite loop? Write an infinite loop statement.
e) What is a constructor? When is it invoked?.
                            

Question 3.                                                                               [2x10=20]

a) List the variables from those given below that are composite data types.
i)                   static int x;

ii)                boolean b;

iii)              arr[i]=10;

iv)              private char chr;

v)                 obj.display();

vi)              String str;

 b) State the output of the following program segment.                                                                      
             String s1 = “great”; String s2=”minds”;
       System.out.println(str1.substring(0,2).concat(str2.substring(1)));      
      System.out.println((“WH” + (str1.substring(2).toUpperCase() )));                                                      

 c) What are the final values stored in variables x and y below?
                double a = -6.35;
                double b = 14.74;
                double x = Math.abs(Math.ceil(a));
                double y = Math.rint(Math.max(a,b));

                            
 d) Rewrite the following program segment using the if-else statements.                                          
          String grade =(mark>=90)? ”A” : (mark>=80) ? “B“ : “C“ ;

 e) Give output of the following method?
                public static void main(String args[]) {                                            
                int a = 5;      
                a++;
                System.out.println(a);
                a- =(a-- ) – (-- a );
          System.out.println(a); }
               
 f)  What is the data type returned by the library functions?                             
             i)  compareTo()
             ii) equals()

 g) State the value of characteristic and mantissa when the following code is executed.
String s = “4.3756” ;
                int n = s.indexOf(‘.’);
                int characteristic = Integer.parseInt(s.substring(0,n));
int mantissa = Integer.valueOf(s.substring(n+1));

 h) Study the method and answer the given questions?    
public void sampleMethod() {                                            
                for(int i=0; i<3; i++)   
                {
                   for(int j=0; i<2; j++)   
                   {
                      int number = (int)(Math.random()*10 );  
              System.out.println(number);
   } } }
i)                   How many times does the loop execute?
ii)                What is the range of possible values stored in the variable number?

 i) Consider the following class:   
public class myClass {        
public static int x=3, y=4;
public int a=2, b=3; }
                                                 
i)                   Name the variables for which each object of the class will have its own distinct copy.
ii)                Name the variables that are common to all objects of the class.


j)  What will be the output when the following code segments are executed?                             
              i)    String s = “1001”;
                     int x = Integer.valueOf(s);
                      double y = Double.valueOf(s);
                      System.out.println(“x=” +x);      
                      System.out.println(“y=” +y);      

               
             ii)    System.out.println(“The King said \”Begin at the begining!\” to me.”);              
               
                         
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 named movieMagic with the following description:     [15]
          Instance variables/data members:
          int year       - to store the year of release of the movie
          String title     - to store the title of the movie.
          float rating            - to store the popularity rating of the movie.
 (minimum=0.0 and maximum=5.0)
         
          Member Methods:
          movieMagic()         - default constructor to initialize integer data members
                                         to zero and string data members to “”.
          void accept()                  - to input and store year, title and rating.         
void display()        - to display the title of a movie and a message based
on the rating as per the table below:        
              
Rating
Message to be displayed
0.0 to 2.0
Flop
2.1 to 3.4
Semi-Hit
3.5 to 4.5
Hit
4.6 to 5.0
Super-Hit

Write a main method to create an object of the class and call the above member methods.
Q5. A special two digit number is such that when the sum of its digits is added to the product of its digits, the result is equal to the original two-digit number.   [15] 
 Example: Consider number 59
Sum of digits = 5 + 9 = 14
Product of its digits = 5 x 9 = 45
Sum of the sum of digits and product of digits = 14 + 45 = 59

Write a program to accept a two-digit number. Add the sum of its digits to the product of its digits. If the value is equal to the number input, output the message “Special 2-digit number” otherwise; output the message “Not a Special 2-digit number”.

Q6. Write a program to assign a full path and file name as given below. Using library functions, extract and output the file path, file name and file extension separately as shown below:                                                                 [15]          
Input:                             C:Users\admin\Pictures\flower.jpg                          
Output Path:         C:Users\admin\Pictures\    
File Name:            flower
Extension:             jpg

Q7. Design a class to overload a function area() as follows:           [15]                      
(i) double area(double a, double b, double c) with three double arguments and
     returns  the area of a scalene triangle using the formula:
     area =  s(s – a)(s - b)(s - c) where s = (a+b+c) / 2
         
(ii) double area(int a, int  b, int height) with three integer arguments
      and returns  the area of a trapezium using the formula:
      area = 1/2  * height(a+b)

(iii) double area(double diagonal1,double diagonal2) with two double arguments
      and returns  the area of a rhombus using the formula:
      area = 1/2 (diagonal1 * diagonal2)

           
Q8. Using the switch statement, write a menu driven program:     [15]                      
     To calculate the maturity amount of a bank deposit.
     The user is given following options:
     (i)  Term Deposit
     (ii) Recurring Deposit
For option (i) accept principal (P), rate of interest(r) and time period in years(n). Calculate and output the maturity amount (A) receivable using the formula:
A = P[1 + r / 100 ]n.
For option (ii) accept monthly installment (P), rate of interest(r) and time period in months(n). Calculate and output the maturity amount (A) receivable using the formula:
A=P * n + P * n(n+1)/2 * r/100 * 1/12

For an incorrect option, an appropriate error message should be displayed.

Q9. Write a program to accept the year of graduation from school as an integer value from the user. Using the Binary search technique on the sorted array of integers given below, output the message “Record exists” if the value input is located in the array. If not, output the message “Record does not exist”.   [15]                     
{1982, 1987, 1993, 1996, 1999, 2003, 2006, 2007, 2009, 2010} 

Monday, March 11, 2013

ICSE computer applications 2013 board paper


ICSE Java Complete Reference book is currently available as print on demand and can be bought from online stores. Please check the discounts offered by different websites. second edition of book (2013 release) includes 2013 board paper solution.


Good news!!


Discount is offered on 25+ copies. For more details write to info@pothi.com 

Additionally: Complimentary shipping for 25+ copies in a single order to a single address within India.
Note: No further negotiation in terms of discount will be possible with Pothi.com as  discounts are standard.


1.    Pothi.com:
2.    infibeam :
3.    flipkart : 
4.    homeshop18 : 
5.    Amazon India : 
6.    dial a book : 


ICSE Paper – 2013
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.


Q1.a) What is meant by precedence of operators?                           [2x5=10]
      b) What is a literal?                                                                                                                      
      c) State the Java concept that is implemented through:                                        
             i)    a super class and a subclass.
             ii)   the act of representing essential features without including
                    background details.                                                 
      d) Give a difference between constructor and method.         
      e) What are the types of casting shown by the following examples?                                  
             i)    double x =15.2;
     int y =(int) x;
             ii)   int x =12;
                   long y = x;

Q2.a)  Name any two wrapper classes.                                         [2x5=10]
                   
      b) What is the difference between break and continue statements
when they occur in a loop.
      c) Write statements to show how finding the length of a character
           array and char[] differs from finding the length of a String object str.
                            
      d) Name the Java keyword that:                                                           
             (i)  indicates a method has no return type.
             (ii) stores the address of the currently calling object.  
                             
      e) What is an exception?                                                                                                                      

Q3.a) Write Java statement to create an object mp4 of class digital. [2x10=20]
                                      
 b) State the values stored in variables str1 and str2                                                                      
             String s1 = “good”; String s2=”world matters”;
       String str1 = s2.substring(5).replace(‘t’,’n’);
       String str2 = s1.concat(str1);
 c) What does a class encapsulate?
 d) Rewrite the following program segment using the if..else statement.                                          
           comm =(sale>15000)?sale*5/100:0;
 e) How many times will the following loop execute?
     What value will be returned?                                            
     int x = 2, y = 50;      
     do{
        ++x;
        y-=x++;
      }while(x<=10);   
     return y;

 f)  What is the data type that the following library functions return?                             
             i)  isWhitespace(char ch)
             ii) Math.random()
 g) Write a Java expression for ut + ½ ft2
 h) If int n[] ={1, 2, 3, 5, 7, 9, 13, 16} what are the values of x and y?    
x=Math.pow(n[4],n[2]);
y=Math.sqrt(n[5]+[7]);

 i)  What is the final value of ctr after the iteration process given below, executes?         
            int ctr=0;
      for(int i=1;i<=5;i++)
        for(int j=1;j<=5;j+=2)
          ++ctr;          

j)  Name the methods of Scanner class that:                             
              i)    is used to input an integer data from standard input stream.                                               
             ii)   is used to input a string data from standard input stream.
                         

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 FruitJuice with the following description:     [15]
          Instance variables/data members:
          int product_code    - stores the product code number
          String flavour        - stores the flavor of the juice.(orange, apple, etc)
          String pack_type    - stores the type of packaging (tetra-pack, bottle etc)
          int pack_size          - stores package size (200ml, 400ml etc)
          int product_price   - stores the price of the product

          Member Methods:
          FriuitJuice()           - default constructor to initialize integer data members
                                  to zero and string data members to “”.
          void input() - to input and store the product code, flavor, pack type,
                                            pack size and product price.        
          void discount()      - to reduce the product price by 10.
          void display()        - to display the product code, flavor, pack type,
                                            pack size and product price.        
              
Q5. The International Standard Book Number (ISBN) is a unique numeric book identifier which is printed on every book. The ISBN is based upon a 10-digit code. The ISBN is legal if:
1xdigit1 + 2xdigit2 + 3xdigit3 + 4xdigit4 + 5xdigit5 + 6xdigit6 + 7xdigit7 + 8xdigit8 + 9xdigit9 + 10xdigit10 is divisible by 11.
 
 Example: For an ISBN 1401601499
Sum=1x1 + 2x4 + 3x0 + 4x1 + 5x6 + 6x0 + 7x1 + 8x4 + 9x9 + 10x9 = 253 which is divisible by 11.

Write a program to:
(i) input the ISBN code as a 10-digit integer.
(ii) If the ISBN is not a 10-digit integer, output the message “Illegal ISBN” and terminate the program.
(iii) If the number is 10-digit, extract the digits of the number and compute the sum as explained above.
If the sum is divisible by 11, output the message, “Legal ISBN”. If the sum is not divisible by 11, output the message, “Illegal ISBN”.      [15]           

Q6. Write a program that encodes a word into Piglatin. To translate word into Piglatin word, convert the word into uppercase and then place the first vowel of the original word as the start of the new word along with the remaining alphabets. The alphabets present before the vowel being shifted towards the end followed by “AY”.
Sample Input(1): London        Sample Output(1):   ONDONLAY                           
Sample Input(2): Olympics     Sample Output(2):    OLYMPICSAY    [15]           

Q7. Write a program to input 10 integer elements in an array and sort them
 In descending order using bubble sort technique.         [15]           

Q8. Design a class to overload a function series() as follows:    [15]                      
(i) double series(double n) with one double argument and
     returns  the sum of the series.
     sum = 1/1 + 1/2 + 1/3 + ….. 1/n

(ii) double series(double a, double n) with two double arguments
      and returns  the sum of the series.
      sum = 1/a2 + 4/a5 + 7/a8 + 10/a11 ….. to n terms
           
Q9. Using the switch statement, write a menu driven program:     [15]                      
(i) To check and display whether a number input by the user is
     a composite number or not (A number is said to be a composite, if it
     has one or more then one factors excluding 1 and the number itself).
     Example: 4, 6, 8, 9…

(ii) To find the smallest digit of an integer that is input:
      Sample input:              6524
      Sample output:           Smallest digit is 2
For an incorrect choice, an appropriate error message should be displayed.