Probably a good idea to consider three different types of questions. I tend to go for
1) questions pretty much asking you to regurgitate crime conventions and say how they are subverted to adjust to the society they are portraying/have been composed in
(I actually have seen only a couple of these - they are probably the easiest by far)
2) questions which relate conventions back to values inherent in society at the time the work was written...ie. "what views do the composers of your texts put forth through conforming to and subverting conventions?" (justice, gender roles, etc.)
3) questions which incorporate contemporary readings, ie. "Different readers respond differently to crime texts.", and you would look at how society's interpretation of crime texts has changed throughout time and what this says about changing values and contexts
Weisy