Pretty straight forward really. No preparation required. Some maths questions, relatively easy but time is a factor; some visual recognition problems (kind of like 'spot the difference' Reasoning problems: read a paragraph and choose the right inference/ conclusion/ assumption from a choice of 4.Finally psychometric testing. 100 questions to determine whether your fit to fly tin or whether you resolve grievances the Air Botswana way. One tip with these questions: answer them honestly, even if you conclude that your answers make you look dangerous to employ.
all the best, and if you get an interview make sure you tell them how much you want to live in Ireland. In fact make up a relative or two in Dublin.
Tip before your interview: show some aptitude and learn how to spell Air [sic] Lingus