The tests are multiple choice (up to 26 answers), and they aren't negatively marked- so if you don't know an answer, give it your best educated guess- you won't be punished for it.
Extended Matching Information
The EMI can give you one question with a list of possible answers, or it could be a few questions with a shared answer set. The same answer may be correct twice in a question, so don't be put off by this.
The DIT is often seen as the harder exam, but again don't be put off- hopefully you'll be pleasantly surprised by your mark afterwards. As the name suggests, you can be given data and asked to infer a diagnosis or symptom from it. There is also the dreaded anatomy, which usually forms about 5 pictures of specimens, and asks you to match the names to these. There might also be some anatomy through the exam via diagrams or scans. In terms of anatomy questions, start with what you do know on a picture- even if it's not what they're looking for in the question, it allows you to eliminate an answer, and might give you a hint as to the location of something else: "well if that's the thyroid, maybe that's the superior laryngeal nerve"
Single Best Answer
This exam style has now been adopted for stage 3 and stage 4 written examinations. The questions offer 5 technically correct answers, with only one 'most correct' or best answer. Many students find this question style very difficult, especially if they are used to EMI and DIT papers in stages 1 & 2. The aim of this kind of question is to improve critical thinking and recognise that some courses of action are more Important than others. Significantly, it is designed to provide useful practice for the (very important) Situational Judgement Test sat in final year, which adopts the same question style.