Define 'hard'!
Your instructor wouldn't recommend you to the examiner if he/she didn't think you were up to the mark.
If you can do the exercises with your instructor then you can do them with the examiner.
Well if you can fly it should be OK but insanity can creep in I got a partial pass due to opening the throttle to pull out of a spiral dive, relised right away what i had done but was too late. Ho hum passed the retest it amazing what stress can make you do.