Yes .... I would like to share my experience here...
I read K&B book more than twice and i gave all the exams of
examlab and K&B master exams also... The real exam was far easy than that of examlab's. in 2-3 questions i was confused but my 10 answers were wrong that was unexpected..
Well whatever be the score but preparation of this exam gave me a lot more knowledge about
Java programming language....
in K&B's exams my average score was about 83% and in examlab it was around 71%....