About Question enthuware.ocpjp.ii.v11.2.1574 :

[pavel.gurinovich]

The question is quite confusing especially when you don't see number of answers.
It asks:

Which of the following options avoids a deadlock?

And third option formally avoids deadlock:

The second thread should call getLocks() only after first thread exits out of it.
This is not necessary. Option 2 works just fine.

Should I expect such questions from Oracle regarding concurrency?

[admin]

1. Our simulator does show the number of correct answer (as does the real exa). Not sure why you are not seeing that. May be you are using a customized test where Show Number of Correct Answers option is unchecked.
2. The "should" in option 3 has now been changed to "must" to make it clear.

thank you for your feedback!