Most Asked Coding Questions In IT Companies

Frequently asked Questions in the Technical round of the IT Companies.

1. Program to print the String in Reverse.

package iamAlien;

import java.util.Scanner;

public class Alien {

public static void main(String[] args)

{

      Scanner sc = new Scanner(System.in);  

      System.out.println("Enter Any String without Space: ");

      String reverse ="";

      String str = sc.nextLine();

      for(int i=0; i<str.length(); i++)

      {

    reverse = str.charAt(i) + reverse;

      

      }

      System.out.println(reverse);

}

}

2. Program to count the occurring a particular Alphabet in the word taken by the User.

package iamAlien;

import java.util.Scanner;

public class Alien {

public static void main(String[] args)

{

      Scanner sc = new Scanner(System.in);  

      System.out.println("Enter Any your Sentence: ");

      String str = sc.nextLine();

      System.out.println("Enter the Alphabet Which you want to Count:");

      char alp =sc.next().charAt(0);

      int count=0;

      for(int i=0; i<str.length(); i++)

      {

    if(alp == str.charAt(i))

    {

    count++;

    }

      

      }

      System.out.println(count);

}

}

3. Check whether the String is Palindrome or Not.

package iamAlien;

import java.util.Scanner;

public class Alien {

public static void main(String[] args)

{

      Scanner sc = new Scanner(System.in);  

      System.out.println("Enter Any your String ");

      String str = sc.nextLine();

      String reverse ="";

      for(int i=0; i<str.length(); i++)

      {

         reverse = str.charAt(i)+reverse;

      }

      if(reverse.equals(str))

      System.out.println("String Is Palindrom");

      else 

      System.out.println("String is Not Palindrom");

}

}

4. Count the Total Numbers of Vowels and Consonants in the String.

package iamAlien;

import java.util.Scanner;

public class Alien {

public static void main(String[] args)

{

      Scanner sc = new Scanner(System.in);  

      System.out.println("Enter your String ");

      String str = sc.nextLine();

      char c;

      int c1=0,c2=0;

      for(int i=0; i<str.length(); i++)

      {

         c = str.charAt(i);

         if(c=='a'||c=='e'||c=='i'||c=='o'||c=='u')

        c1++;

         else

        c2++;

         

      }

      System.out.println("Vowels Are:"+c1);

      System.out.println("Consonants Are:"+c2);

}

}