Please answer all questions. There is intentionally no 'not sure' option - you must have some opinion on each question. Don't spend too long thinking about it though, taking it too seriously says more about your personality than the actual result will. There are currently 25 questions.
The questions assume a reasonable level of familiarity with the structures of DSU. If you are unsure about the meaning of a question, background information for each question is available. If you've taken the test before an explanation of the results is available, but you should probably take the test before reading that. Past results are also available.
For some of the questions you may be thinking 'it depends on X' and you're right, it probably does. Answer based on what you think a common and/or average X would be.