Java OCA OCP Practice Question 482

Question

What is the output of the following code snippet? 

public class Main {
   public static void main(String... args) {
      int x = 10, y = 5; 
      boolean w = true, z = false; 
      x = w ? y++ : y--; /*from  w  w w  .  j  a  va  2 s  . c om*/
      w = !z; 
      System.out.print((x+y)+" "+(w ? 5 : 10)); 
   }

}
  • A. The code does not compile.
  • B. 10 10
  • C. 11 5
  • D. 12 5 


C.

Note

The code compiles, so Option A is incorrect.

Since w starts out true, the third line takes the first right-hand side of the ternary expression returning and assigning 5 to x (post-increment operator) while incrementing y to 6.

Note that the second right-hand side of the ternary expression y-- is not evaluated since ternary operators only evaluate one right-hand expression at runtime.

On the fourth line, the value of w is set to !z.

Since z is false, the value of w remains true.

The final line outputs the value of (5+6) and (true ? 5 : 10), which is 11 5, making Option C the correct answer.




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