If it's anything like the 9 Delta exam, it'll be completely multiple-choice questions. Some are general knowledge questions about what features are new in 10. Some of them will be kind of hard to remember if you're used to using 10 and barely remember 9. Then, it'll have some interactive questions that are meant to incorporate new features (though you don't always have to use the new features to get the answer). There are no judged questions, so you'll get your score immediately at the end.