It was my turn today to take the exam.
I found that 4 hrs were NOT sufficient enough for me to do justice to all the 161 questions.
I took time to double check each of the questions initially even the simpler ones ( and this probably cost me some time) therefore, by the time I reached the last 20-30 questions, I had to rush through.
These last few questions were all to do with "Threads" and "GC", and all were code intensive.
There were quite a few questions about String operations. Most to do with the immutable nature of Strings. And at least 7-8 questions dealt with POST-INCREMENT, PRE-INCREMENT operators. There were a few questions on the implementation of "hashCode" and "equals" methods.
The questions on assertions were quite simple and the material provided by SUN is more than enough.
I got atleast 5-6 questions on encapsulation. They were of the True or False type.
There was a question on LinkedHashSet. Rest were more to do with the hierarchy.
If I remember anything else important I will post the same. The exam was exhausting to say the least.