The order of questions on examinations
Exam question order is known to influence performance via confidence and self-efficacy. Put easy questions at the beginning, hard questions at the end, and group questions together if they pertain to the same topic. Difficulty should be inherent in the question itself rather than in the test taker getting oriented to the topic, question, and answer choices. Example set of recommendation, though the following link pertains to surveying rather than assessment. https://www.socialresearchmethods.net/kb/quesplac.php 

I can't find the reference at the moment, but if I recall the details, a not infrequently cited example is that demographic questions accompanied a common college entrance test. Placing the questions at the end rather than at the beginning eliminated the gender difference previously observed.