OCPJP 6 Practice exams, exam 2 q 29 error

[Kristian Lund]

29. Given that:

Exception is the superclass of IOException, and
IOException is the superclass of FileNotFoundException, and
3. import java.io.*;
4. class Physicist {
5. void think() throws IOException { }
6. }
7. public class Feynman extends Physicist {
8. public static void main(String[] args) {
9. new Feynman().think();
10. }
11. // insert method here
12. }

Which of the following methods, inserted independently at line 11, compiles? (Choose all
that apply.)
A. void think() throws Exception { }
B. void think() throws FileNotFoundException { }
C. public void think() { }
D. protected void think() throws IOException { }
E. private void think() throws IOException { }
F. void think() { int x = 7/0; }

The book gives B,C,D and F as answers. B and D wont compile because the call from the main method does not handle the exception.

So the right answer is C and F.

[Bert Bates]

How about if main() throws exception?

[samir vasani]

Kristian Lund wrote:

29. Given that:

Exception is the superclass of IOException, and
IOException is the superclass of FileNotFoundException, and
3. import java.io.*;
4. class Physicist {
5. void think() throws IOException { }
6. }
7. public class Feynman extends Physicist {
8. public static void main(String[] args) {
9. new Feynman().think();
10. }
11. // insert method here
12. }

Which of the following methods, inserted independently at line 11, compiles? (Choose all
that apply.)
A. void think() throws Exception { }
B. void think() throws FileNotFoundException { }
C. public void think() { }
D. protected void think() throws IOException { }
E. private void think() throws IOException { }
F. void think() { int x = 7/0; }

The book gives B,C,D and F as answers. B and D wont compile because the call from the main method does not handle the exception.

So the right answer is C and F.

Hi ,,

Here it is not provided that main() throws IOException..
So if it is included then the answer is BCDF .
It is not necessary that every time they correct.

If possible please mention the source..

[John Wintermute]

Bert Bates wrote:How about if main() throws exception?

Hi there,

Are you saying we can assume that, when the individual lines are added, that main() might change to accommodate the change? It makes questions hard to answer as it's a little ambiguous.

I hope there's not too many like that on the exam! But I suppose that, if we're told how many answers to select, then B and D are the only possible choices other than C and F, so we'd have to choose them.

Cheers, john