Computer Applications

Write a Java program to store n numbers in an one dimensional array. Pass this array to a function number(int a[]). Display only those numbers whose sum of digit is prime.

Java

Java Arrays

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Answer

import java.util.Scanner;

public class KboatSDAPrime
{
    public void number(int a[]) {
        
        System.out.println("Numbers whose sum of digit is prime:");
        
        for (int i = 0; i < a.length; i++) {
            int x = a[i];
            int s = 0;
            while (x != 0) {
                int d = x % 10;
                s += d;
                x /= 10;
            }
            
            int c = 0;
            for (int j = 1; j <= s; j++) {
                if (s % j == 0) {
                    c++;
                }
            }
            
            if (c == 2) {
                System.out.println(a[i]);
            }
        }
        
    }
    
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter the number of elements: ");
        int n = in.nextInt();
        int arr[] = new int[n];
        
        System.out.println("Enter array elements: ");
        for (int i = 0; i < n; i++) {
            arr[i] = in.nextInt();
        }
        
        KboatSDAPrime obj = new KboatSDAPrime();
        obj.number(arr);
    }
}

Output

Answered By

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A class teacher wants to arrange the names of her students in alphabetical order. Define a class NameSorter that stores the given names in a one-dimensional array. Sort the names in alphabetical order using Bubble Sort technique only and display the sorted names.
Aryan, Zoya, Ishaan, Neha, Rohan, Tanya, Manav, Simran, Kabir, Pooja

public class NameSorter
{
    void bubbleSort(String names[]) {
        int len = names.length;
        _______(1)_________ {
            _______(2)_________ {
                _______(3)_________ {
                    String t = names[j];
                    _______(4)_________
                    _______(5)_________
                }
            }
        }
    }
    
    public static void main(String[] args) {
        
        String arr[] = {"Aryan", "Zoya", 
                        "Ishaan", "Neha", 
                        "Rohan", "Tanya", 
                        "Manav", "Simran", 
                        "Kabir", "Pooja"
                       };
                       
        NameSorter obj = new NameSorter();
        obj.bubbleSort(arr);
        
        for (int i = 0; i < arr.length; i++) {
            System.out.println(arr[i]);
        }
    }
}

View Answer

The statement used to find the total number of Strings present in the string array String s[] is:
s.length
s.length()
length(s)
len(s)
View Answer

What is the output of the Java code given below?

String color[] = {"Blue", "Red", "Violet"};
System.out.println(color[2].length());

View Answer

Which of the following is a valid way to declare and initialize an integer array to store the ages of 50 students?
View Answer

Computer Applications

Write a Java program to store n numbers in an one dimensional array. Pass this array to a function number(int a[]). Display only those numbers whose sum of digit is prime.

Java

Java Arrays

Answer

Output

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The statement used to find the total number of Strings present in the string array String s[] is:s.lengths.length()length(s)len(s)

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Which of the following is a valid way to declare and initialize an integer array to store the ages of 50 students?

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