Java OCA OCP Practice Question 1058

Question

What is printed besides the stack trace caused by the NullPointerException from line 16? 

1: public class Main { 
2:   public void go() { 
3:     System.out.print("A"); 
4:     try { //ww  w.  ja va  2  s.  c o m
5:         stop(); 
6:     } catch (ArithmeticException e) { 
7:         System.out.print("B"); 
8:     } finally { 
9:         System.out.print("C"); 
10:    } 
11:    System.out.print("D"); 
12:  } 
13:  public void stop() { 
14:    System.out.print("E"); 
15:    Object x = null; 
16:    x.toString(); 
17:    System.out.print("F"); 
18:  } 
19:  public static void main(String[] args) { 
20:    new Main().go(); 
21:  } 
22: } 

A.  AE 
B.  AEBCD 
C.  AEC 
D.  AECD 
E.  No output appears other than the stack trace. 



C.

Note

The main() method invokes go and A is printed on line 3.

The stop method is invoked and E is printed on line 14.

Line 16 throws a NullPointerException, so stop immediately ends and line 17 doesn't execute.

The exception isn't caught in go, so the go method ends as well, but not before its finally block executes and C is printed on line 9.

Because main() doesn't catch the exception, the stack trace displays and no further output occurs, so AEC was the output printed before the stack trace.




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