Q: Question 5Using the switch-case statement, write a menu driven program to do the following:(a) To generate and print Letters from A to Z and their UnicodeLettersUnicodeA65B66......Z90(b) Display the following pattern using iteration (looping) statement:11 21 2 31 2 3 41 2 3 4 5

import java.util.Scanner; public class KnowledgeBoat { public static void main(String args[]) { Scanner in = new Scanner(System.in); System.out.println("Enter 1 for letters and Unicode"); System.out.println("Enter 2 to display the pattern"); System.out.print("Enter your choice: "); int ch = in.nextInt(); switch(ch) { case 1: System.out.println("Letters\tUnicode"); for (int i = 65; i <= 90; i++) System.out.println((char)i + "\t" + i); break; case 2: for (int i = 1; i <= 5; i++) { for (int j = 1; j <= i; j++) System.out.print(j + " "); System.out.println(); } break; default: System.out.println("Wrong choice"); break; } } }Output

Q: Question 6Write a program to input 15 integer elements in an array and sort them in ascending order using the bubble sort technique.

import java.util.Scanner; public class KboatBubbleSort { public static void main(String args[]) { Scanner in = new Scanner(System.in); int n = 15; int arr[] = new int[n]; System.out.println("Enter the elements of the array:"); for (int i = 0; i < n; i++) { arr[i] = in.nextInt(); } //Bubble Sort for (int i = 0; i < n - 1; i++) { for (int j = 0; j < n - i - 1; j++) { if (arr[j] > arr[j + 1]) { int t = arr[j]; arr[j] = arr[j+1]; arr[j+1] = t; } } } System.out.println("Sorted Array:"); for (int i = 0; i < n; i++) { System.out.print(arr[i] + " "); } } }Output

Q: Question 7Design a class to overload a function series( ) as follows:(a) void series (int x, int n) – To display the sum of the series given below:x1 + x2 + x3 + .......... xn terms(b) void series (int p) – To display the following series:0, 7, 26, 63 .......... p terms(c) void series () – To display the sum of the series given below:1/2 + 1/3 + 1/4 + .......... 1/10

public class KboatOverloadSeries { void series(int x, int n) { long sum = 0; for (int i = 1; i <= n; i++) { sum += Math.pow(x, i); } System.out.println("Sum = " + sum); } void series(int p) { for (int i = 1; i <= p; i++) { int term = (int)(Math.pow(i, 3) - 1); System.out.print(term + " "); } System.out.println(); } void series() { double sum = 0.0; for (int i = 2; i <= 10; i++) { sum += 1.0 / i; } System.out.println("Sum = " + sum); } }Output

Q: Question 8Write a program to input a sentence and convert it into uppercase and count and display the total number of words starting with a letter 'A'.Example:Sample Input: ADVANCEMENT AND APPLICATION OF INFORMATION TECHNOLOGY ARE EVER CHANGING.Sample Output: Total number of words starting with letter 'A' = 4

import java.util.Scanner; public class WordsWithLetterA { public static void main(String args[]) { Scanner in = new Scanner(System.in); System.out.println("Enter a string: "); String str = in.nextLine(); str = " " + str; //Add space in the begining of str int c = 0; int len = str.length(); str = str.toUpperCase(); for (int i = 0; i < len - 1; i++) { if (str.charAt(i) == ' ' && str.charAt(i + 1) == 'A') c++; } System.out.println("Total number of words starting with letter 'A' = " + c); } }Output

Q: Question 9A tech number has even number of digits. If the number is split in two equal halves, then the square of sum of these halves is equal to the number itself. Write a program to generate and print all four digits tech numbers.Example:Consider the number 3025Square of sum of the halves of 3025 = (30 + 25)2= (55)2= 3025 is a tech number.

public class TechNumbers { public static void main(String args[]) { for (int i = 1000; i <= 9999; i++) { int secondHalf = i % 100; int firstHalf = i / 100; int sum = firstHalf + secondHalf; if (i == sum * sum) System.out.println(i); } } }Output

Question 1

Question 4Design a class name ShowRoom with the following description:Instance variables / Data members:String name — To store the name of the customerlong mobno — To store the mobile number of the customerdouble cost — To store the cost of the items purchaseddouble dis — To store the discount amountdouble amount — To store the amount to be paid after discountMember methods:ShowRoom() — default constructor to initialize data membersvoid input() — To input customer name, mobile number, costvoid calculate() — To calculate discount on the cost of purchased items, based on following criteriaCostDiscount (in percentage)Less than or equal to ₹100005%More than ₹10000 and less than or equal to ₹2000010%More than ₹20000 and less than or equal to ₹3500015%More than ₹3500020%void display() — To display customer name, mobile number, amount to be paid 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 ShowRoom
{
    private String name;
    private long mobno;
    private double cost;
    private double dis;
    private double amount;

public ShowRoom()
    {
        name = "";
        mobno = 0;
        cost = 0.0;
        dis = 0.0;
        amount = 0.0;
    }

public void input() {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter customer name: ");
        name = in.nextLine();
        System.out.print("Enter customer mobile no: ");
        mobno = in.nextLong();
        System.out.print("Enter cost: ");
        cost = in.nextDouble();
    }
    
    public void calculate() {
        int disPercent = 0;
        if (cost <= 10000)
            disPercent = 5;
        else if (cost <= 20000)
            disPercent = 10;
        else if (cost <= 35000)
            disPercent = 15;
        else
            disPercent = 20;
        
        dis = cost * disPercent / 100.0;
        amount = cost - dis;
    }
    
    public void display() {
        System.out.println("Customer Name: " + name);
        System.out.println("Mobile Number: " + mobno);
        System.out.println("Amout after discount: " + amount);
    }
    
    public static void main(String args[]) {
        ShowRoom obj = new ShowRoom();
        obj.input();
        obj.calculate();
        obj.display();
    }
}Output

Question 2

Question 5Using the switch-case statement, write a menu driven program to do the following:(a) To generate and print Letters from A to Z and their UnicodeLettersUnicodeA65B66......Z90(b) Display the following pattern using iteration (looping) statement:11 21 2 31 2 3 41 2 3 4 5

Accepted Answer

import java.util.Scanner;

public class KnowledgeBoat
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.println("Enter 1 for letters and Unicode");
        System.out.println("Enter 2 to display the pattern");
        System.out.print("Enter your choice: ");
        int ch = in.nextInt();
        switch(ch) {
            case 1:
            System.out.println("Letters	Unicode");
            for (int i = 65; i <= 90; i++)
                System.out.println((char)i + "	" + i);
            break;
            
            case 2:
            for (int i = 1; i <= 5; i++) {
                for (int j = 1; j <= i; j++)
                    System.out.print(j + " ");
                System.out.println();
            }
            break;
            
            default:
            System.out.println("Wrong choice");
            break;
        }
    }
}Output

Question 3

Question 6Write a program to input 15 integer elements in an array and sort them in ascending order using the bubble sort technique.

Accepted Answer

import java.util.Scanner;

public class KboatBubbleSort
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        int n = 15;
        int arr[] = new int[n];
        
        System.out.println("Enter the elements of the array:");
        for (int i = 0; i < n; i++) {
            arr[i] = in.nextInt();
        }
        
        //Bubble Sort
        for (int i = 0; i < n - 1; i++) {
            for (int j = 0; j < n - i - 1; j++) {
                if (arr[j] > arr[j + 1]) {
                    int t = arr[j];
                    arr[j] = arr[j+1];
                    arr[j+1] = t;
                }
            } 
        }
        
        System.out.println("Sorted Array:");
        for (int i = 0; i < n; i++) {
            System.out.print(arr[i] + " ");
        }
    }
}Output

Question 4

Question 7Design a class to overload a function series( ) as follows:(a) void series (int x, int n) – To display the sum of the series given below:x1 + x2 + x3 + .......... xn terms(b) void series (int p) – To display the following series:0, 7, 26, 63 .......... p terms(c) void series () – To display the sum of the series given below:1/2 + 1/3 + 1/4 + .......... 1/10

Accepted Answer

public class KboatOverloadSeries
{
    void series(int x, int n) {
        long sum = 0;
        for (int i = 1; i <= n; i++) {
            sum += Math.pow(x, i);
        }
        System.out.println("Sum = " + sum);
    }

void series(int p) {
        for (int i = 1; i <= p; i++) {
            int term = (int)(Math.pow(i, 3) - 1);
            System.out.print(term + " ");
        }
        System.out.println();
    }

void series() {
        double sum = 0.0;
        for (int i = 2; i <= 10; i++) {
            sum += 1.0 / i;
        }
        System.out.println("Sum = " + sum);
    }
}Output

Question 5

Question 8Write a program to input a sentence and convert it into uppercase and count and display the total number of words starting with a letter 'A'.Example:Sample Input: ADVANCEMENT AND APPLICATION OF INFORMATION TECHNOLOGY ARE EVER CHANGING.Sample Output: Total number of words starting with letter 'A' = 4

Accepted Answer

import java.util.Scanner;

public class WordsWithLetterA
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.println("Enter a string: ");
        String str = in.nextLine();
        str = " " + str; //Add space in the begining of str
        int c = 0;
        int len = str.length();
        str = str.toUpperCase();
        for (int i = 0; i < len - 1; i++) {
            if (str.charAt(i) == ' ' && str.charAt(i + 1) == 'A')
                c++;
        }
        System.out.println("Total number of words starting with letter 'A' = " + c);
    }
}Output

Question 6

Question 9A tech number has even number of digits. If the number is split in two equal halves, then the square of sum of these halves is equal to the number itself. Write a program to generate and print all four digits tech numbers.Example:Consider the number 3025Square of sum of the halves of 3025 = (30 + 25)2= (55)2= 3025 is a tech number.

Accepted Answer

public class TechNumbers
{
    public static void main(String args[]) {
        for (int i = 1000; i <= 9999; i++) {
            int secondHalf = i % 100;
            int firstHalf = i / 100;
            int sum = firstHalf + secondHalf;
            if (i == sum * sum)
                System.out.println(i);
        }
    }
}Output

Solved 2019 Question Paper ICSE Class 10 Computer Applications