Q: Question 6Write a program to accept a string. Convert the string into upper case letters. Count and output the number of double letter sequences that exist in the string.Sample Input: "SHE WAS FEEDING THE LITTLE RABBIT WITH AN APPLE"Sample Output: 4

import java.util.Scanner; public class KboatLetterSeq { public static void main(String args[]) { Scanner in = new Scanner(System.in); System.out.print("Enter string: "); String s = in.nextLine(); String str = s.toUpperCase(); int count = 0; int len = str.length(); for (int i = 0; i < len - 1; i++) { if (str.charAt(i) == str.charAt(i + 1)) count++; } System.out.println("Double Letter Sequence Count = " + count); } }Output

Q: Question 7Design a class to overload a function polygon() as follows:void polygon(int n, char ch) — with one integer and one character type argument to draw a filled square of side n using the character stored in ch.void polygon(int x, int y) — with two integer arguments that draws a filled rectangle of length x and breadth y, using the symbol '@'.void polygon() — with no argument that draws a filled triangle shown below:Example:Input value of n=2, ch = 'O'Output:OOOOInput value of x = 2, y = 5Output:@@@@@@@@@@Output:******

public class KboatPolygon { public void polygon(int n, char ch) { for (int i = 1; i <= n; i++) { for (int j = 1; j <= n; j++) { System.out.print(ch); } System.out.println(); } } public void polygon(int x, int y) { for (int i = 1; i <= x; i++) { for (int j = 1; j <= y; j++) { System.out.print('@'); } System.out.println(); } } public void polygon() { for (int i = 1; i <= 3; i++) { for (int j = 1; j <= i; j++) { System.out.print('*'); } System.out.println(); } } public static void main(String args[]) { KboatPolygon obj = new KboatPolygon(); obj.polygon(2, 'o'); System.out.println(); obj.polygon(2, 5); System.out.println(); obj.polygon(); } }Output

Q: Question 8Using a switch statement, write a menu driven program to:(a) Generate and display the first 10 terms of the Fibonacci series0, 1, 1, 2, 3, 5The first two Fibonacci numbers are 0 and 1, and each subsequent number is the sum of the previous two.(b) Find the sum of the digits of an integer that is input.Sample Input: 15390Sample Output: Sum of the digits = 18For an incorrect choice, an appropriate error message should be displayed.

import java.util.Scanner; public class KboatFibonacciNDigitSum { public static void main(String args[]) { Scanner in = new Scanner(System.in); System.out.println("1. Fibonacci Series"); System.out.println("2. Sum of digits"); System.out.print("Enter your choice: "); int ch = in.nextInt(); switch (ch) { case 1: int a = 0, b = 1; System.out.print(a + " " + b); for (int i = 3; i <= 10; i++) { int term = a + b; System.out.print(" " + term); a = b; b = term; } break; case 2: System.out.print("Enter number: "); int num = in.nextInt(); int sum = 0; while (num != 0) { sum += num % 10; num /= 10; } System.out.println("Sum of Digits " + " = " + sum); break; default: System.out.println("Incorrect choice"); break; } } }Output

Q: Question 9Write a program to accept the names of 10 cities in a single dimensional string array and their STD (Subscribers Trunk Dialling) codes in another single dimension integer array. Search for the name of a city input by the user in the list. If found, display "Search Successful" and print the name of the city along with its STD code, or else display the message "Search unsuccessful, no such city in the list".

import java.util.Scanner; public class KboatStdCodes { public static void main(String args[]) { final int SIZE = 10; Scanner in = new Scanner(System.in); String cities[] = new String[SIZE]; String stdCodes[] = new String[SIZE]; System.out.println("Enter " + SIZE + " cities and their STD codes:"); for (int i = 0; i < SIZE; i++) { System.out.print("Enter City Name: "); cities[i] = in.nextLine(); System.out.print("Enter its STD Code: "); stdCodes[i] = in.nextLine(); } System.out.print("Enter name of city to search: "); String city = in.nextLine(); int idx; for (idx = 0; idx < SIZE; idx++) { if (city.compareToIgnoreCase(cities[idx]) == 0) { break; } } if (idx < SIZE) { System.out.println("Search Successful"); System.out.println("City: " + cities[idx]); System.out.println("STD Code: " + stdCodes[idx]); } else { System.out.println("Search Unsuccessful"); } } }Output

Question 1

Question 4Define a class called Library with the following description:Instance Variables/Data Members:int accNum — stores the accession number of the book.String title — stores the title of the book.String author — stores the name of the author.Member methods:void input() — To input and store the accession number, title and author.void compute() — To accept the number of days late, calculate and display the fine charged at the rate of Rs. 2 per day.void display() — To display the details in the following format:Accession Number    Title   Author
Write a main method to create an object of the class and call the above member methods.

Accepted Answer

import java.util.Scanner;

public class Library
{
    private int accNum;
    private String title;
    private String author;
    
    void input() {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter book title: ");
        title = in.nextLine();
        System.out.print("Enter author: ");
        author = in.nextLine();
        System.out.print("Enter accession number: ");
        accNum = in.nextInt();
    }
    
    void compute() {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter number of days late: ");
        int days = in.nextInt();
        int fine = days * 2;
        System.out.println("Fine = Rs." + fine);
    }
    
    void display() {
        System.out.println("Accession Number	Title	Author");
        System.out.println(accNum + "		" + title + "	" + author);
    }
    
    public static void main(String args[]) {
        Library obj = new Library();
        obj.input();
        obj.display();
        obj.compute();
    }
}Output

Question 2

Question 5Given below is a hypothetical table showing rates of income tax for male citizens below the age of 65 years:Taxable income (TI) in ₹Income Tax in ₹Does not exceed Rs. 1,60,000NilIs greater than Rs. 1,60,000 and less than or equal to Rs. 5,00,000.(TI - 1,60,000) x 10%Is greater than Rs. 5,00,000 and less than or equal to Rs. 8,00,000[(TI - 5,00,000) x 20%] + 34,000Is greater than Rs. 8,00,000[(TI - 8,00,000) x 30%] + 94,000Write a program to input the age, gender (male or female) and Taxable Income of a person.If the age is more than 65 years or the gender is female, display “wrong category”. If the age is less than or equal to 65 years and the gender is male, compute and display the income tax payable as per the table given above.

Accepted Answer

import java.util.Scanner;

public class KboatIncomeTax
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter Gender(male/female): ");
        String gender = in.nextLine();
        System.out.print("Enter Age: ");
        int age = in.nextInt();
        System.out.print("Enter Taxable Income: ");
        double ti = in.nextDouble();
        double tax = 0.0;

if (age > 65 || gender.equalsIgnoreCase("female")) {
            System.out.print("Wrong Category");
        }
        else {
            if (ti <= 160000)
                tax = 0;
            else if (ti <= 500000)
                tax = (ti - 160000) * 10 / 100;
            else if (ti <= 800000)
                tax = 34000 + ((ti - 500000) * 20 / 100);
            else
                tax = 94000 + ((ti - 800000) * 30 / 100);
                
            System.out.println("Tax Payable: " + tax);
        }      
    }
}Output

Question 3

Question 6Write a program to accept a string. Convert the string into upper case letters. Count and output the number of double letter sequences that exist in the string.Sample Input: "SHE WAS FEEDING THE LITTLE RABBIT WITH AN APPLE"Sample Output: 4

Accepted Answer

import java.util.Scanner;

public class KboatLetterSeq
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter string: ");
        String s = in.nextLine();
        String str = s.toUpperCase();
        int count = 0;
        int len = str.length();
        
        for (int i = 0; i < len - 1; i++) {
            if (str.charAt(i) == str.charAt(i + 1))
                count++;
        }
        
        System.out.println("Double Letter Sequence Count = " + count);
        
    }
}Output

Question 4

Question 7Design a class to overload a function polygon() as follows:void polygon(int n, char ch) — with one integer and one character type argument to draw a filled square of side n using the character stored in ch.void polygon(int x, int y) — with two integer arguments that draws a filled rectangle of length x and breadth y, using the symbol '@'.void polygon() — with no argument that draws a filled triangle shown below:Example:Input value of n=2, ch = 'O'Output:OOOOInput value of x = 2, y = 5Output:@@@@@@@@@@Output:******

Accepted Answer

public class KboatPolygon
{
    public void polygon(int n, char ch) {
        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= n; j++) {
                System.out.print(ch);
            }
            System.out.println();
        }
    }
    
    public void polygon(int x, int y) {
        for (int i = 1; i <= x; i++) {
            for (int j = 1; j <= y; j++) {
                System.out.print('@');
            }
            System.out.println();
        }
    }
    
    public void polygon() {
        for (int i = 1; i <= 3; i++) {
            for (int j = 1; j <= i; j++) {
                System.out.print('*');
            }
            System.out.println();
        }
    }
    
    public static void main(String args[]) {
        KboatPolygon obj = new KboatPolygon();
        obj.polygon(2, 'o');
        System.out.println();
        obj.polygon(2, 5);
        System.out.println();
        obj.polygon();
    }
}Output

Question 5

Question 8Using a switch statement, write a menu driven program to:(a) Generate and display the first 10 terms of the Fibonacci series0, 1, 1, 2, 3, 5The first two Fibonacci numbers are 0 and 1, and each subsequent number is the sum of the previous two.(b) Find the sum of the digits of an integer that is input.Sample Input: 15390Sample Output: Sum of the digits = 18For an incorrect choice, an appropriate error message should be displayed.

Accepted Answer

import java.util.Scanner;

public class KboatFibonacciNDigitSum
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.println("1. Fibonacci Series");
        System.out.println("2. Sum of digits");
        System.out.print("Enter your choice: ");
        int ch = in.nextInt();

switch (ch) {
            case 1:
            int a = 0, b = 1;
            System.out.print(a + " " + b);
            for (int i = 3; i <= 10; i++) {
                int term = a + b;
                System.out.print(" " + term);
                a = b;
                b = term;
            }
            break;

case 2:
            System.out.print("Enter number: ");
            int num = in.nextInt();
            int sum = 0;
            while (num != 0) {
                sum += num % 10;
                num /= 10;
            }
            System.out.println("Sum of Digits " + " = " + sum);
            break;

default:
            System.out.println("Incorrect choice");
            break;
        }
    }
}Output

Question 6

Question 9Write a program to accept the names of 10 cities in a single dimensional string array and their STD (Subscribers Trunk Dialling) codes in another single dimension integer array. Search for the name of a city input by the user in the list. If found, display "Search Successful" and print the name of the city along with its STD code, or else display the message "Search unsuccessful, no such city in the list".

Accepted Answer

import java.util.Scanner;

public class KboatStdCodes
{
    public static void main(String args[]) {
        final int SIZE = 10;
        Scanner in = new Scanner(System.in);
        String cities[] = new String[SIZE];
        String stdCodes[] = new String[SIZE];
        System.out.println("Enter " + SIZE + 
                 " cities and their STD codes:");
        
        for (int i = 0;  i < SIZE; i++) {
            System.out.print("Enter City Name: ");
            cities[i] = in.nextLine();
            System.out.print("Enter its STD Code: ");
            stdCodes[i] = in.nextLine();
        }
        
        System.out.print("Enter name of city to search: ");
        String city = in.nextLine();
        
        int idx;
        for (idx = 0;  idx < SIZE; idx++) {
            if (city.compareToIgnoreCase(cities[idx]) == 0) {
                break;
            }
        }
        
        if (idx < SIZE) {
            System.out.println("Search Successful");
            System.out.println("City: " + cities[idx]);
            System.out.println("STD Code: " + stdCodes[idx]);
        }
        else {
            System.out.println("Search Unsuccessful");
        }
    }
}Output

Solved 2012 Question Paper ICSE Class 10 Computer Applications