Exam 1z0-809 topic 1 question 14 discussion

Actual exam question from Oracle's 1z0-809

Question #: 14
Topic #: 1

Given the code fragments:
4. void doStuff() throws ArithmeticException, NumberFormatException, Exception {
5. if (Math.random() >-1 throw new Exception ("Try again");
6. }
and
24. try {
25. doStuff ( ):
26. } catch (ArithmeticException | NumberFormatException | Exception e) {
27. System.out.println (e.getMessage()); }
28. catch (Exception e) {
29. System.out.println (e.getMessage()); }
30. }
Which modification enables the code to print Try again?

A. Comment the lines 28, 29 and 30.
B. Replace line 26 with: } catch (Exception | ArithmeticException | NumberFormatException e) {
C. Replace line 26 with: } catch (ArithmeticException | NumberFormatException e) {
D. Replace line 27 with: throw e;

Show Suggested Answer

Suggested Answer: C 🗳️

by Innovation at Jan. 13, 2020, 2:33 p.m.

Comments

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asdfjhfgjuaDCV

9 months, 4 weeks ago

C is the correct answer. public class Test { static void doStuff() throws ArithmeticException, NumberFormatException, Exception { if (Math.random() > -1) throw new Exception("Try again"); } public static void main(String[] args) { try { doStuff(); } catch (ArithmeticException | NumberFormatException e) { System.out.println(e.getMessage()); } catch (Exception e){ System.out.println(e.getMessage()); } } }

upvoted 1 times

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steefaand

10 months, 3 weeks ago

Selected Answer: C

C is correct since Exception classes in multi-catch must be unrelated. Also if superclass and sublass are caught then code must first catch subclass and then superclass.

upvoted 1 times

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r1muka5

1 year, 10 months ago

Option C is correct despite the fact that the code wouldnt still compile because of error on line 5 (missing closing bracket in the if)

upvoted 1 times

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WilsonKKerll

2 years, 9 months ago

Option A can't compile Types in multi-catch must be disjoint: 'java.lang.NumberFormatException' is a subclass of 'java.lang.Exception'

upvoted 1 times

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WilsonKKerll

2 years, 10 months ago

Answer C is better than A. Code is more readable.

upvoted 1 times

mevlt

2 years, 9 months ago

it is not just because of readability. multi-catch can't have parent and child together. Exception is parent of both ArithmeticException and NumberFormatException.

upvoted 3 times

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