ok, the appen test. assuming it's for yukon project...
the guidelines are everything. but you can't just use find to look up all the questions. they take some critical thinking. the first part is true/false. it's like 20 questions or so with 5 individual questions about the same topic in each high level question.
the second and third parts are just like the real tasks you do.
it's hard because none of it is intuitive. you can't use your experience to figure it out, because they have specific guidelines. for example, if something doesn't load you're supposed to rate it medium even though i feel like it "should" be low.
i passed it the first time but if you don't pass it the first time you'll almost certainly be able to retake it.
the whole thing took me probably 10 hours.