My teacher just told me to know our "innovation case studies" really well, but didnt spend any time revising for the exam (what with the mdp due and all).
My DNT exam is after English Paper 2 Modules (Advanced) so im going to be absolutely bummed after it
My advice would be to look at past papers and see if there is a general trend of the style of questions they ask.
I'll try and tackle it in sections
Section 1: multiple choice. Just know the design process and some key terms like "entrepreneur" and you should be fine.
Section 2: requires you to think like a designer, what problems does this have, what solutions can you think of
Section 3: this is an essay. I'm not that sure how you can study for this but just have a go anyway
Attached is the 2015 DT exam
2015 DNT examSorry i wasnt much help but feel free to flick me a pm or question on here if you need any clarification