Java Developer

Example: Let U = {1,2,3,4,5,6,7,8,9,10} and A= {1,3,5,7,9}. Find A. S

The average of 8 numbers is 21. If each of the numbers is mulitiplied by 8, the average of the new set of numbers is 

Here , The average of 8 numbers = 21
When each number is multiplied by 8, the new average gets multiplied by 8.
So , New average = 21 × 8 = 168

A single letter is selected at random from the word 'PROBABILITY' . The probability that it is a vowel, is ?

Total number of letters = n(S) = 11
whereas, number of vowels = n(E) = 4
∴ Required probability = n(E)/n(s) = 4/11

What is the output of the following Java program?

public class Test   
{  
   Test(int a, int b)  
   {  
       System.out.println("a = "+a+" b = "+b);  
   }  
   Test(int a, float b)  
   {  
       System.out.println("a = "+a+" b = "+b);  
   }  
   public static void main (String args[])  
   {  
       byte a = 10;   
       byte b = 15;  
       Test test = new Test(a,b);  
   }  
}

What is the output of the following Java program?
class Test   
{  
   int test_a, test_b;  
   Test(int a, int b)   
   {  
   test_a = a;   
   test_b = b;   
   }  
   public static void main (String args[])   
   {  
       Test test = new Test();   
       System.out.println(test.test_a+" "+test.test_b);  
   }  
}

Can we assign the reference to this variable?

final int a;