Java OCA OCP Practice Question 578

Question

What is the output of the following code? 

1: public class Main { 
2:   public static void main(String[] args) { 
3:     int x = 5; 
4:     System.out.println(x > 2 ? x < 4 ? 10 : 8 : 7); 
5: }
6:}
  • A. 5
  • B. 4
  • C. 10
  • D. 8
  • E. 7
  • F. The code will not compile because of line 4. 


D.

Note

As you learned in the section "Ternary Operator," although parentheses are not required, they do greatly increase code readability, such as the following equivalent statement: 

System.out.println((x > 2) ? ((x < 4) ? 10 : 8) : 7)

We apply the outside ternary operator first, as it is possible the inner ternary expression may never be evaluated.

Since (x>2) is true, this reduces the problem to: 

System.out.println((x < 4) ? 10 : 8)

Since x is greater than 2, the answer is 8, or option D in this case.




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