Q: Question 5Using the switch statement, write a menu driven program for the following:(i) To print the Floyd’s triangle [Given below]12 34 5 67 8 9 1011 12 13 14 15(b) To display the following pattern:II CI C SI C S EFor an incorrect option, an appropriate error message should be displayed.

import java.util.Scanner; public class KboatPattern { public static void main(String args[]) { Scanner in = new Scanner(System.in); System.out.println("Type 1 for Floyd's triangle"); System.out.println("Type 2 for an ICSE pattern"); System.out.print("Enter your choice: "); int ch = in.nextInt(); switch (ch) { case 1: int a = 1; for (int i = 1; i <= 5; i++) { for (int j = 1; j <= i; j++) { System.out.print(a++ + "\t"); } System.out.println(); } break; case 2: String s = "ICSE"; for (int i = 0; i < s.length(); i++) { for (int j = 0; j <= i; j++) { System.out.print(s.charAt(j) + " "); } System.out.println(); } break; default: System.out.println("Incorrect Choice"); } } }Output

Q: Question 6Special words are those words which start and end with the same letter.Example: EXISTENCE, COMIC, WINDOWPalindrome words are those words which read the same from left to right and vice-versa.Example: MALYALAM, MADAM, LEVEL, ROTATOR, CIVICAll palindromes are special words but all special words are not palindromes.Write a program to accept a word. Check and display whether the word is a palindrome or only a special word or none of them.

import java.util.Scanner; public class KboatSpecialPalindrome { public static void main(String args[]) { Scanner in = new Scanner(System.in); System.out.print("Enter a word: "); String str = in.next(); str = str.toUpperCase(); int len = str.length(); if (str.charAt(0) == str.charAt(len - 1)) { boolean isPalin = true; for (int i = 1; i < len / 2; i++) { if (str.charAt(i) != str.charAt(len - 1 - i)) { isPalin = false; break; } } if (isPalin) { System.out.println("Palindrome"); } else { System.out.println("Special"); } } else { System.out.println("Neither Special nor Palindrome"); } } }Output

Q: Question 7Design a class to overload a function sumSeries() as follows:(i) void sumSeries(int n, double x): with one integer argument and one double argument to find and display the sum of the series given below:s=x1−x2+x3−x4+x5... ... ... to n termss = \dfrac{x}{1} - \dfrac{x}{2} + \dfrac{x}{3} - \dfrac{x}{4} + \dfrac{x}{5} ...\space ...\space ...\space to \space n \space termss=1x−2x+3x−4x+5x... ... ... to n terms(ii) void sumSeries(): to find and display the sum of the following series:s=1+(1×2)+(1×2×3)+... ... ... +(1×2×3×4... ... ... ×20)s = 1 + (1 \times 2) + (1 \times 2 \times 3) + ...\space ...\space ...\space + (1 \times 2 \times 3 \times 4 ...\space ...\space ...\space \times 20)s=1+(1×2)+(1×2×3)+... ... ... +(1×2×3×4... ... ... ×20)

public class KboatOverload { void sumSeries(int n, double x) { double sum = 0; for (int i = 1; i <= n; i++) { double t = x / i; if (i % 2 == 0) sum -= t; else sum += t; } System.out.println("Sum = " + sum); } void sumSeries() { long sum = 0, term = 1; for (int i = 1; i <= 20; i++) { term *= i; sum += term; } System.out.println("Sum=" + sum); } }Output

Q: Question 8Write a program to accept a number and check and display whether it is a Niven number or not.(Niven number is that number which is divisible by its sum of digits.).Example:Consider the number 126. Sum of its digits is 1 + 2 + 6 = 9 and 126 is divisible by 9.

import java.util.Scanner; public class KboatNivenNumber { public void checkNiven() { Scanner in = new Scanner(System.in); System.out.print("Enter number: "); int num = in.nextInt(); int orgNum = num; int digitSum = 0; while (num != 0) { int digit = num % 10; num /= 10; digitSum += digit; } /* * digitSum != 0 check prevents * division by zero error for the * case when users gives the number * 0 as input */ if (digitSum != 0 && orgNum % digitSum == 0) System.out.println(orgNum + " is a Niven number"); else System.out.println(orgNum + " is not a Niven number"); } }Output

Q: Question 9Write a program to initialize the seven Wonders of the World along with their locations in two different arrays. Search for a name of the country input by the user. If found, display the name of the country along with its Wonder, otherwise display "Sorry not found!".Seven Wonders:CHICHEN ITZA, CHRIST THE REDEEMER, TAJ MAHAL, GREAT WALL OF CHINA, MACHU PICCHU, PETRA, COLOSSEUMLocations:MEXICO, BRAZIL, INDIA, CHINA, PERU, JORDAN, ITALYExamples:Country name: INDIAOutput: TAJ MAHALCountry name: USAOutput: Sorry Not found!

import java.util.Scanner; public class Kboat7Wonders { public static void main(String args[]) { String wonders[] = {"CHICHEN ITZA", "CHRIST THE REDEEMER", "TAJMAHAL", "GREAT WALL OF CHINA", "MACHU PICCHU", "PETRA", "COLOSSEUM"}; String locations[] = {"MEXICO", "BRAZIL", "INDIA", "CHINA", "PERU", "JORDAN", "ITALY"}; Scanner in = new Scanner(System.in); System.out.print("Enter country: "); String c = in.nextLine(); int i; for (i = 0; i < locations.length; i++) { if (locations[i].equals(c)) { System.out.println(locations[i] + " - " + wonders[i]); break; } } if (i == locations.length) System.out.println("Sorry Not Found!"); } }Output

Question 1

Question 4Define a class named BookFair with the following description:Instance variables/Data members:String Bname — stores the name of the bookdouble price — stores the price of the bookMember methods:(i) BookFair() — Default constructor to initialize data members(ii) void Input() — To input and store the name and the price of the book.(iii) void calculate() — To calculate the price after discount. Discount is calculated based on the following criteria.PriceDiscountLess than or equal to ₹10002% of priceMore than ₹1000 and less than or equal to ₹300010% of priceMore than ₹300015% of price(iv) void display() — To display the name and price of the book after discount.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 BookFair
{
    private String bname;
    private double price;
    
    public BookFair() {
        bname = "";
        price = 0.0;
    }
    
    public void input() {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter name of the book: ");
        bname = in.nextLine();
        System.out.print("Enter price of the book: ");
        price = in.nextDouble();
    }
    
    public void calculate() {
        double disc;
        if (price <= 1000)
            disc = price * 0.02;
        else if (price <= 3000)
            disc = price * 0.1;
        else
            disc = price * 0.15;
            
        price -= disc;
    }
    
    public void display() {
        System.out.println("Book Name: " + bname);
        System.out.println("Price after discount: " + price);
    }
    
    public static void main(String args[]) {
        BookFair obj = new BookFair();
        obj.input();
        obj.calculate();
        obj.display();
    }
}Output

Question 2

Question 5Using the switch statement, write a menu driven program for the following:(i) To print the Floyd’s triangle [Given below]12   34   5   67   8   9  1011 12 13 14 15(b) To display the following pattern:II CI C SI C S EFor an incorrect option, an appropriate error message should be displayed.

Accepted Answer

import java.util.Scanner;

public class KboatPattern
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.println("Type 1 for Floyd's triangle");
        System.out.println("Type 2 for an ICSE pattern");
        
        System.out.print("Enter your choice: ");
        int ch = in.nextInt();
        
        switch (ch) {
            case 1:
            int a = 1;
            for (int i = 1; i <= 5; i++) {
                for (int j = 1; j <= i; j++) {
                    System.out.print(a++ + "	");
                }
                System.out.println();
            }
            break;
            
            case 2:
            String s = "ICSE";
            for (int i = 0; i < s.length(); i++) {
                for (int j = 0; j <= i; j++) {
                    System.out.print(s.charAt(j) + " ");
                }
                System.out.println();
            }
            break;
            
            default:
            System.out.println("Incorrect Choice");
        }
    }
}Output

Question 3

Question 6Special words are those words which start and end with the same letter.Example: EXISTENCE, COMIC, WINDOWPalindrome words are those words which read the same from left to right and vice-versa.Example: MALYALAM, MADAM, LEVEL, ROTATOR, CIVICAll palindromes are special words but all special words are not palindromes.Write a program to accept a word. Check and display whether the word is a palindrome or only a special word or none of them.

Accepted Answer

import java.util.Scanner;

public class KboatSpecialPalindrome
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter a word: ");
        String str = in.next();
        str = str.toUpperCase();
        int len = str.length();
        
        if (str.charAt(0) == str.charAt(len - 1)) {
            boolean isPalin = true;
            for (int i = 1; i < len / 2; i++) {
                if (str.charAt(i) != str.charAt(len - 1 - i)) {
                    isPalin = false;
                    break;
                }
            }
            
            if (isPalin) {
                System.out.println("Palindrome");
            }
            else {
                System.out.println("Special");
            }
        }
        else {
            System.out.println("Neither Special nor Palindrome");
        }
        
    }
}Output

Question 4

Question 7Design a class to overload a function sumSeries() as follows:(i) void sumSeries(int n, double x): with one integer argument and one double argument to find and display the sum of the series given below:s=x1−x2+x3−x4+x5... ... ... to n termss = \dfrac{x}{1} - \dfrac{x}{2} + \dfrac{x}{3} - \dfrac{x}{4} + \dfrac{x}{5} ...\space ...\space ...\space to \space n \space termss=1x​−2x​+3x​−4x​+5x​... ... ... to n terms(ii) void sumSeries(): to find and display the sum of the following series:s=1+(1×2)+(1×2×3)+... ... ... +(1×2×3×4... ... ... ×20)s = 1 + (1 	imes 2) + (1 	imes 2 	imes 3) + ...\space ...\space ...\space + (1 	imes 2 	imes 3 	imes 4 ...\space ...\space ...\space 	imes 20)s=1+(1×2)+(1×2×3)+... ... ... +(1×2×3×4... ... ... ×20)

Accepted Answer

public class KboatOverload
{
    void sumSeries(int n, double x) {
        double sum = 0;
        for (int i = 1; i <= n; i++) {
            double t = x / i;
            if (i % 2 == 0)
                sum -= t;
            else
                sum += t;
        }
        System.out.println("Sum = " + sum);
    }
    
    void sumSeries() {
        long sum = 0, term = 1;
        for (int i = 1; i <= 20; i++) {
            term *= i;
            sum += term;
        }
        System.out.println("Sum=" + sum);
    }
}Output

Question 5

Question 8Write a program to accept a number and check and display whether it is a Niven number or not.(Niven number is that number which is divisible by its sum of digits.).Example:Consider the number 126. Sum of its digits is 1 + 2 + 6 = 9 and 126 is divisible by 9.

Accepted Answer

import java.util.Scanner;

public class KboatNivenNumber
{
    public void checkNiven() {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter number: ");
        int num = in.nextInt();
        int orgNum = num;
        
        int digitSum = 0;
        
        while (num != 0) {
            int digit = num % 10;
            num /= 10;
            digitSum += digit;
        }
        
        /*
         * digitSum != 0 check prevents
         * division by zero error for the
         * case when users gives the number
         * 0 as input
         */
        if (digitSum != 0 && orgNum % digitSum == 0)
            System.out.println(orgNum + " is a Niven number");
        else
            System.out.println(orgNum + " is not a Niven number");
    }
}Output

Question 6

Question 9Write a program to initialize the seven Wonders of the World along with their locations in two different arrays. Search for a name of the country input by the user. If found, display the name of the country along with its Wonder, otherwise display "Sorry not found!".Seven Wonders:CHICHEN ITZA, CHRIST THE REDEEMER, TAJ MAHAL, GREAT WALL OF CHINA, MACHU PICCHU, PETRA, COLOSSEUMLocations:MEXICO, BRAZIL, INDIA, CHINA, PERU, JORDAN, ITALYExamples:Country name: INDIAOutput: TAJ MAHALCountry name: USAOutput: Sorry Not found!

Accepted Answer

import java.util.Scanner;

public class Kboat7Wonders
{
    public static void main(String args[]) {
        
        String wonders[] = {"CHICHEN ITZA", "CHRIST THE REDEEMER", "TAJMAHAL", 
            "GREAT WALL OF CHINA", "MACHU PICCHU", "PETRA", "COLOSSEUM"};
        
        String locations[] = {"MEXICO", "BRAZIL", "INDIA", "CHINA", "PERU", "JORDAN",
        "ITALY"};
        
        Scanner in = new Scanner(System.in);
        System.out.print("Enter country: ");
        String c = in.nextLine();
        int i;
        
        for (i = 0; i < locations.length; i++) {
            if (locations[i].equals(c)) {
                System.out.println(locations[i] + " - " + wonders[i]);
                break;
            }
        }
        
        if (i == locations.length)
            System.out.println("Sorry Not Found!");
    }
}Output

Solved 2016 Question Paper ICSE Class 10 Computer Applications