Q: Question 5Write two separate programs to generate the following patterns using iteration (loop) statements:(a)** #* # ** # * #* # * # *(b)5 4 3 2 15 4 3 25 4 35 45

public class KboatPattern { public static void main(String args[]) { for (int i = 1; i <=5; i++) { for (int j = 1; j <= i; j++) { if (j % 2 == 0) System.out.print("# "); else System.out.print("* "); } System.out.println(); } } }Outputpublic class KboatPattern { public static void main(String args[]) { for (int i = 1; i <=5; i++) { for (int j = 5; j >= i; j--) { System.out.print(j + " "); } System.out.println(); } } }Output

Q: Question 7Design a class to overload a function Joystring( ) as follows:void Joystring(String s, char ch1, char ch2) with one string argument and two character arguments that replaces the character argument ch1 with the character argument ch2 in the given String s and prints the new string.Example:Input value of s = "TECHNALAGY"ch1 = 'A'ch2 = 'O'Output: "TECHNOLOGY"void Joystring(String s) with one string argument that prints the position of the first space and the last space of the given String s.Example:Input value of s = "Cloud computing means Internet based computing"Output:First index: 5Last Index: 36void Joystring(String s1, String s2) with two string arguments that combines the two strings with a space between them and prints the resultant string.Example:Input value of s1 = "COMMON WEALTH"Input value of s2 = "GAMES"Output: COMMON WEALTH GAMES(Use library functions)

public class KboatStringOverload { public void joystring(String s, char ch1, char ch2) { String newStr = s.replace(ch1, ch2); System.out.println(newStr); } public void joystring(String s) { int f = s.indexOf(' '); int l = s.lastIndexOf(' '); System.out.println("First index: " + f); System.out.println("Last index: " + l); } public void joystring(String s1, String s2) { String newStr = s1.concat(" ").concat(s2); System.out.println(newStr); } public static void main(String args[]) { KboatStringOverload obj = new KboatStringOverload(); obj.joystring("TECHNALAGY", 'A', 'O'); obj.joystring("Cloud computing means Internet based computing"); obj.joystring("COMMON WEALTH", "GAMES"); } }Output

Q: Question 8Write a program to input twenty names in an array. Arrange these names in descending order of letters, using the bubble sort technique.

import java.util.Scanner; public class KboatArrangeNames { public static void main(String args[]) { Scanner in = new Scanner(System.in); String names[] = new String[20]; System.out.println("Enter 20 names:"); for (int i = 0; i < names.length; i++) { names[i] = in.nextLine(); } //Bubble Sort for (int i = 0; i < names.length - 1; i++) { for (int j = 0; j < names.length - 1 - i; j++) { if (names[j].compareToIgnoreCase(names[j + 1]) < 0) { String temp = names[j + 1]; names[j + 1] = names[j]; names[j] = temp; } } } System.out.println("\nSorted Names"); for (int i = 0; i < names.length; i++) { System.out.println(names[i]); } } }Output

Q: Question 9Using switch statement, write a menu driven program to:(i) To find and display all the factors of a number input by the user ( including 1 and the excluding the number itself).Example:Sample Input : n = 15Sample Output : 1, 3, 5(ii) To find and display the factorial of a number input by the user (the factorial of a non-negative integer n, denoted by n!, is the product of all integers less than or equal to n.)Example:Sample Input : n = 5Sample Output : 5! = 1*2*3*4*5 = 120For an incorrect choice, an appropriate error message should be displayed.

import java.util.Scanner; public class KboatMenu { public static void main(String args[]) { Scanner in = new Scanner(System.in); System.out.println("1. Factors of number"); System.out.println("2. Factorial of number"); System.out.print("Enter your choice: "); int choice = in.nextInt(); int num; switch (choice) { case 1: System.out.print("Enter number: "); num = in.nextInt(); for (int i = 1; i < num; i++) { if (num % i == 0) { System.out.print(i + " "); } } System.out.println(); break; case 2: System.out.print("Enter number: "); num = in.nextInt(); int f = 1; for (int i = 1; i <= num; i++) f *= i; System.out.println("Factorial = " + f); break; default: System.out.println("Incorrect Choice"); break; } } }Output

Question 1

Question 4Define a class called ParkingLot with the following description:Instance variables/data members:int vno — To store the vehicle number.int hours — To store the number of hours the vehicle is parked in the parking lot.double bill — To store the bill amount.Member Methods:void input() — To input and store the vno and hours.void calculate() — To compute the parking charge at the rate of ₹3 for the first hour or part thereof, and ₹1.50 for each additional hour or part thereof.void display() — To display the detail.Write a main() method to create an object of the class and call the above methods.

Accepted Answer

import java.util.Scanner;

public class ParkingLot
{
    private int vno;
    private int hours;
    private double bill;
    
    public void input() {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter vehicle number: ");
        vno = in.nextInt();
        System.out.print("Enter hours: ");
        hours = in.nextInt();
    }
    
    public void calculate() {
        if (hours <= 1)
            bill = 3;
        else
            bill = 3 + (hours - 1) * 1.5;
    }
    
    public void display() {
        System.out.println("Vehicle number: " + vno);
        System.out.println("Hours: " + hours);
        System.out.println("Bill: " + bill);
    }
    
    public static void main(String args[]) {
        ParkingLot obj = new ParkingLot();
        obj.input();
        obj.calculate();
        obj.display();
    }
}Output

Question 2

Question 5Write two separate programs to generate the following patterns using iteration (loop) statements:(a)**  #*  #  **  #  *  #*  #  *  #  *(b)5 4 3 2 15 4 3 25 4 35 45

Accepted Answer

public class KboatPattern
{
    public static void main(String args[]) {
        for (int i = 1; i <=5; i++) {
            for (int j = 1; j <= i; j++) {
                if (j % 2 == 0)
                    System.out.print("# ");
                else
                    System.out.print("* ");
            }
            System.out.println();
        }
    }
}Outputpublic class KboatPattern
{
    public static void main(String args[]) {
        for (int i = 1; i <=5; i++) {
            for (int j = 5; j >= i; j--) {
                System.out.print(j + " ");
            }
            System.out.println();
        }
    }
}Output

Question 3

Question 6Write a program to input and store roll numbers, names and marks in 3 subjects of n number of students in five single dimensional arrays and display the remark based on average marks as given below:Average MarksRemark85 — 100Excellent75 — 84Distinction60 — 74First Class40 — 59PassLess than 40Poor

Accepted Answer

import java.util.Scanner;

public class KboatAvgMarks
{
    public static void main(String args[]) {
        
        Scanner in = new Scanner(System.in);
        System.out.print("Enter number of students: ");
        int n = in.nextInt();
        
        int rollNo[] = new int[n];
        String name[] = new String[n];
        int s1[] = new int[n];
        int s2[] = new int[n];
        int s3[] = new int[n];
        double avg[] = new double[n];
        
        for (int i = 0; i < n; i++) {
            System.out.println("Enter student " + (i+1) + " details:");
            System.out.print("Roll No: ");
            rollNo[i] = in.nextInt();
            in.nextLine();
            System.out.print("Name: ");
            name[i] = in.nextLine();
            System.out.print("Subject 1 Marks: ");
            s1[i] = in.nextInt();
            System.out.print("Subject 2 Marks: ");
            s2[i] = in.nextInt();
            System.out.print("Subject 3 Marks: ");
            s3[i] = in.nextInt();
            avg[i] = (s1[i] + s2[i] + s3[i]) / 3.0;
        }
        
        System.out.println("Roll No	Name	Remark");
        for (int i = 0; i < n; i++) {
            String remark;
            if (avg[i] < 40) 
                remark = "Poor";
            else if (avg[i] < 60)
                remark = "Pass";
            else if (avg[i] < 75)
                remark = "First Class";
            else if (avg[i] < 85)
                remark = "Distinction";
            else
                remark = "Excellent";
            System.out.println(rollNo[i] + "	" 
                + name[i] + "	" 
                + remark);
        }
    }
}Output

Question 4

Question 7Design a class to overload a function Joystring( ) as follows:void Joystring(String s, char ch1, char ch2) with one string argument and two character arguments that replaces the character argument ch1 with the character argument ch2 in the given String s and prints the new string.Example:Input value of s = "TECHNALAGY"ch1 = 'A'ch2 = 'O'Output: "TECHNOLOGY"void Joystring(String s) with one string argument that prints the position of the first space and the last space of the given String s.Example:Input value of s = "Cloud computing means Internet based computing"Output:First index: 5Last Index: 36void Joystring(String s1, String s2) with two string arguments that combines the two strings with a space between them and prints the resultant string.Example:Input value of s1 = "COMMON WEALTH"Input value of s2 = "GAMES"Output: COMMON WEALTH GAMES(Use library functions)

Accepted Answer

public class KboatStringOverload
{
    public void joystring(String s, char ch1, char ch2) {
        String newStr = s.replace(ch1, ch2);
        System.out.println(newStr);
    }
    
    public void joystring(String s) {
        int f = s.indexOf(' ');
        int l = s.lastIndexOf(' ');
        System.out.println("First index:  " + f);
        System.out.println("Last index:  " + l);
    }
    
    public void joystring(String s1, String s2) {
        String newStr = s1.concat(" ").concat(s2);
        System.out.println(newStr);
    }
    
    public static void main(String args[]) {
        KboatStringOverload obj = new KboatStringOverload();
        obj.joystring("TECHNALAGY", 'A', 'O');
        obj.joystring("Cloud computing means Internet based computing");
        obj.joystring("COMMON WEALTH", "GAMES");
    }
}Output

Question 5

Question 8Write a program to input twenty names in an array. Arrange these names in descending order of letters, using the bubble sort technique.

Accepted Answer

import java.util.Scanner;

public class KboatArrangeNames
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        String names[] = new String[20];
        System.out.println("Enter 20 names:");
        for (int i = 0;  i < names.length; i++) {
            names[i] = in.nextLine();
        }

//Bubble Sort
        for (int i = 0; i < names.length - 1; i++) {
            for (int j = 0; j < names.length - 1 - i; j++) {
                if (names[j].compareToIgnoreCase(names[j + 1]) < 0) {
                    String temp = names[j + 1];
                    names[j + 1] = names[j];
                    names[j] = temp;
                }
            }
        }
        
        System.out.println("
Sorted Names");
        for (int i = 0;  i < names.length; i++) {
            System.out.println(names[i]);
        }
    }
}Output

Question 6

Question 9Using switch statement, write a menu driven program to:(i) To find and display all the factors of a number input by the user ( including 1 and the excluding the number itself).Example:Sample Input : n = 15Sample Output : 1, 3, 5(ii) To find and display the factorial of a number input by the user (the factorial of a non-negative integer n, denoted by n!, is the product of all integers less than or equal to n.)Example:Sample Input : n = 5Sample Output : 5! = 1*2*3*4*5 = 120For an incorrect choice, an appropriate error message should be displayed.

Accepted Answer

import java.util.Scanner;

public class KboatMenu
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.println("1. Factors of number");
        System.out.println("2. Factorial of number");
        System.out.print("Enter your choice: ");
        int choice = in.nextInt();
        int num;

switch (choice) {
            case 1:
            System.out.print("Enter number: ");
            num = in.nextInt();
            for (int i = 1; i < num; i++) {
                if (num % i == 0) {
                    System.out.print(i + " ");
                }
            }
            System.out.println();
            break;

case 2:
            System.out.print("Enter number: ");
            num = in.nextInt();
            int f = 1;
            for (int i = 1; i <= num; i++)
                f *= i;
            System.out.println("Factorial = " + f);
            break;
            
            default:
            System.out.println("Incorrect Choice");
            break;
        }
    }
}Output

Solved 2015 Question Paper ICSE Class 10 Computer Applications