Thread question . Please help .

[Sim Kim]

1. public class SyncTest {
2. private int x;
3. private int y;
4. public synchronized void setX (int i) (x=i
5. public synchronized void setY (int i) (y=i
6. public synchronized void setXY()(set X(i); setY(i)
7. public synchronized Boolean check() (return x !=y
8. )


Under which conditions will check () return true when called from a different class?
A. Check() can never return true.
B. Check() can return true when setXY is called by multiple threads.
C. Check() can return true when multiple threads call setX and setY separately.
D. Check() can only return true if SyncTest is changed to allow x and y to be set
separately.

[Barry Gaunt]

Does anyone know where these questions are coming from?

[Sim Kim]

Hi Barry,

Got this from some site which was giving mock exams . I don't remember the site exactly . I collected it two months ago .

Any issues in the questions .