OCA Java SE 8 Mock Exam - OCA Mock Question 9

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Question

What is the output of the following program?

     1: public class Main { 
     2:  public static void main(String[] args) { 
     3:    
     4:    int myValue = 0; 
     5:    int x = 3; 
     6:    while(myValue++ < 3) { 
     7:      int y = (1 + 2 * myValue) % 3; 
     8:      switch(y) { 
     9:         default: 
     10:         case 0: x -= 1; break; 
     11:         case 1: x += 5; 
     12:      } 
     13:    } 
     14:  System.out.println(x); 
     15: } 
     16:} 

1. 4
2. 5
3. 6
4. 7
5. 13
6. The code will not compile because of line 7.

Answer

Note

F is incorrect. The code compiles and runs without issue.

The following code adds more println statements to make the execution easy to understand.

     public class Main { 
      public static void main(String[] args) { 
        //w  w w . jav  a 2s .c  o m
        int myValue = 0; 
        int x = 3; 
        while(myValue++ < 3) { 
          int y = (1 + 2 * myValue) % 3; 
          System.out.println("   y:"+y); 
          System.out.println("   myValue:"+myValue); 
          System.out.println("   x:"+x); 
          switch(y) { 
             default: 
              case 0: x -= 1; break; 
              case 1: x += 5; 
           } 
        } 
        System.out.println(x); 
      } 
     } 

The code above generates the following result.

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