Q: Question 6Write a program in Java to accept a string in lower case and change the first letter of every word to upper case. Display the new string.Sample input: we are in cyber worldSample output: We Are In Cyber World

import java.util.Scanner; public class KboatString { public static void main(String args[]) { Scanner in = new Scanner(System.in); System.out.println("Enter a sentence:"); String str = in.nextLine(); String word = ""; for (int i = 0; i < str.length(); i++) { if (i == 0 || str.charAt(i - 1) == ' ') { word += Character.toUpperCase(str.charAt(i)); } else { word += str.charAt(i); } } System.out.println(word); } }Output

Q: Question 7Design a class to overload a function volume() as follows:double volume (double R) – with radius (R) as an argument, returns the volume of sphere using the formula.V = 4/3 x 22/7 x R3double volume (double H, double R) – with height(H) and radius(R) as the arguments, returns the volume of a cylinder using the formula.V = 22/7 x R2 x Hdouble volume (double L, double B, double H) – with length(L), breadth(B) and Height(H) as the arguments, returns the volume of a cuboid using the formula.V = L x B x H

public class KboatVolume { double volume(double r) { return (4 / 3.0) * (22 / 7.0) * r * r * r; } double volume(double h, double r) { return (22 / 7.0) * r * r * h; } double volume(double l, double b, double h) { return l * b * h; } public static void main(String args[]) { KboatVolume obj = new KboatVolume(); System.out.println("Sphere Volume = " + obj.volume(6)); System.out.println("Cylinder Volume = " + obj.volume(5, 3.5)); System.out.println("Cuboid Volume = " + obj.volume(7.5, 3.5, 2)); } }Output

Q: Question 8Write a menu driven program to display the pattern as per user’s choice.Pattern 1ABCDEABCDABCABAPattern 2BLLUUUEEEEFor an incorrect option, an appropriate error message should be displayed.

import java.util.Scanner; public class KboatMenuPattern { public static void main(String args[]) { Scanner in = new Scanner(System.in); System.out.println("Enter 1 for pattern 1"); System.out.println("Enter 2 for Pattern 2"); System.out.print("Enter your choice: "); int choice = in.nextInt(); switch (choice) { case 1: for (int i = 69; i >= 65; i--) { for (int j = 65; j <= i; j++) { System.out.print((char)j); } System.out.println(); } break; case 2: String word = "BLUE"; int len = word.length(); for(int i = 0; i < len; i++) { for(int j = 0; j <= i; j++) { System.out.print(word.charAt(i)); } System.out.println(); } break; default: System.out.println("Incorrect choice"); break; } } }Output

Question 1

Question 4Design a class RailwayTicket with following description:Instance variables/data members:String name — To store the name of the customerString coach — To store the type of coach customer wants to travellong mobno — To store customer’s mobile numberint amt — To store basic amount of ticketint totalamt — To store the amount to be paid after updating the original amountMember methods:void accept() — To take input for name, coach, mobile number and amount.void update() — To update the amount as per the coach selected (extra amount to be added in the amount as follows)Type of CoachesAmountFirst_AC700Second_AC500Third_AC250sleeperNonevoid display() — To display all details of a customer such as name, coach, total amount and mobile number.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 RailwayTicket
{
    private String name;
    private String coach;
    private long mobno;
    private int amt;
    private int totalamt;
    
    private void accept() {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter name: ");
        name = in.nextLine();
        System.out.print("Enter coach: ");
        coach = in.nextLine();
        System.out.print("Enter mobile no: ");
        mobno = in.nextLong();
        System.out.print("Enter amount: ");
        amt = in.nextInt();
    }
    
    private void update() {
        if(coach.equalsIgnoreCase("First_AC"))
            totalamt = amt + 700;
        else if(coach.equalsIgnoreCase("Second_AC"))
            totalamt = amt + 500;
        else if(coach.equalsIgnoreCase("Third_AC"))
            totalamt = amt + 250;
        else if(coach.equalsIgnoreCase("Sleeper"))
            totalamt = amt;
    }
    
    private void display() {
        System.out.println("Name: " + name);
        System.out.println("Coach: " + coach);
        System.out.println("Total Amount: " + totalamt);
        System.out.println("Mobile number: " + mobno);
    }
    
    public static void main(String args[]) {
        RailwayTicket obj = new RailwayTicket();
        obj.accept();
        obj.update();
        obj.display();
    }
}Output

Question 2

Question 5Write a program to input a number and check and print whether it is a Pronic number or not. (Pronic number is the number which is the product of two consecutive integers)Examples:12 = 3 x 420 = 4 x 542 = 6 x 7

Accepted Answer

import java.util.Scanner;

public class KboatPronicNumber
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter the number to check: ");
        int num = in.nextInt();
        
        boolean isPronic = false;
        
        for (int i = 1; i <= num - 1; i++) {
            if (i * (i + 1) == num) {
                isPronic = true;
                break;
            }
        }
        
        if (isPronic)
            System.out.println(num + " is a pronic number");
        else
            System.out.println(num + " is not a pronic number");
    }
}Output

Question 3

Question 6Write a program in Java to accept a string in lower case and change the first letter of every word to upper case. Display the new string.Sample input: we are in cyber worldSample output: We Are In Cyber World

Accepted Answer

import java.util.Scanner;

public class KboatString
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.println("Enter a sentence:");
        String str = in.nextLine();
        String word = "";

for (int i = 0; i < str.length(); i++) {
            if (i == 0 || str.charAt(i - 1) == ' ') {
                word += Character.toUpperCase(str.charAt(i));
            }
            else {
                word += str.charAt(i);
            }
        }

System.out.println(word);
    }
}Output

Question 4

Question 7Design a class to overload a function volume() as follows:double volume (double R) – with radius (R) as an argument, returns the volume of sphere using the formula.V = 4/3 x 22/7 x R3double volume (double H, double R) – with height(H) and radius(R) as the arguments, returns the volume of a cylinder using the formula.V = 22/7 x R2 x Hdouble volume (double L, double B, double H) – with length(L), breadth(B) and Height(H) as the arguments, returns the volume of a cuboid using the formula.V = L x B x H

Accepted Answer

public class KboatVolume
{
    double volume(double r) {
        return (4 / 3.0) * (22 / 7.0) * r * r * r;
    }
    
    double volume(double h, double r) {
        return (22 / 7.0) * r * r * h;
    }
    
    double volume(double l, double b, double h) {
        return l * b * h;
    }
    
    public static void main(String args[]) {
        KboatVolume obj = new KboatVolume();
        System.out.println("Sphere Volume = " + 
            obj.volume(6));
        System.out.println("Cylinder Volume = " + 
            obj.volume(5, 3.5));
        System.out.println("Cuboid Volume = " + 
            obj.volume(7.5, 3.5, 2));
    }
}Output

Question 5

Question 8Write a menu driven program to display the pattern as per user’s choice.Pattern 1ABCDEABCDABCABAPattern 2BLLUUUEEEEFor an incorrect option, an appropriate error message should be displayed.

Accepted Answer

import java.util.Scanner;

public class KboatMenuPattern
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.println("Enter 1 for pattern 1");
        System.out.println("Enter 2 for Pattern 2");
        System.out.print("Enter your choice: ");
        int choice = in.nextInt();
        switch (choice) {
            case 1:
            for (int i = 69; i >= 65; i--) {
                for (int j = 65; j <= i; j++) {
                    System.out.print((char)j);
                }
                System.out.println();
            }
            break;

case 2:
            String word = "BLUE";
            int len = word.length();
            for(int i = 0; i < len; i++) {
                for(int j = 0; j <= i; j++) {
                    System.out.print(word.charAt(i));
                }
                System.out.println();
            }
            break;

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

}
    }
}Output

Question 6

Question 9Write a program to accept name and total marks of N number of students in two single subscript array name[] and totalmarks[].Calculate and print:The average of the total marks obtained by N number of students.[average = (sum of total marks of all the students)/N]Deviation of each student’s total marks with the average.[deviation = total marks of a student – average]Answerimport java.util.Scanner;

public class KboatSDAMarks
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter number of students: ");
        int n = in.nextInt();
        
        String name[] = new String[n];
        int totalmarks[] = new int[n];
        int grandTotal = 0;
        
        for (int i = 0; i < n; i++) {
            in.nextLine();
            System.out.print("Enter name of student " + (i+1) + ": ");
            name[i] = in.nextLine();
            System.out.print("Enter total marks of student " + (i+1) + ": ");
            totalmarks[i] = in.nextInt();
            grandTotal += totalmarks[i];
        }
        
        double avg = grandTotal / (double)n;
        System.out.println("Average = " + avg);
        
        for (int i = 0; i < n; i++) {
            System.out.println("Deviation for " + name[i] + " = " 
            + (totalmarks[i] - avg));
        }
    }
}Output

Accepted Answer

Answer: N

Solved 2018 Question Paper ICSE Class 10 Computer Applications