stay at the airport hotel, You'll meet other candidates including Captains (as wizzair pay for their stay) and candidates that have already passed the assessment phase.
multiple choice written exam - maths section probably consists of 20 odd questions and is basic GCSE level nothing too comlicated, questions like what is 1.1 x 1.1 etc
HR questions included in the Multi choice paper at the end, 10 questions, whats bases, describe yourself in 4 words, why wizzair etc, again not complicated. you will get questions on your interview referring to those answers as in why those bases etc