This is real life after I read this question.

advice from me - might also be considered as my criticism because I gave a good response.

The level of general thinking that applies is as follows. 

Memory (knowing what to say), Understand, Application, Analysis, Combination, Evaluation

In making the most common question is the Apply section because it states the process sequence. On the other hand, problems that involve many processes have many ways to solve them, including creating process sequences

In determining the level of thinking we must pay attention to the person who will answer the question. For example, answering questions is students and teachers. Students often ask questions with a level of knowing to analysis or synthesis, while for teachers the questions given usually start from understanding to evaluating.

The level of difficulty is determined based on the teacher's consideration as an expert. Most (50% -60%) items written are expected to have a moderate level of difficulty, the rest have a difficult difficulty level (20% -25%), and easy (20% -25%). The level of difficulty is categorized as moderate if it is estimated that students who can answer items are less than 50%. The level of difficulty of the problem is categorized as difficult if it can only be answered by a small number of students (25%).

While the difficulty level of the problem is categorized as easy if it is estimated that the problem can be answered correctly by most people (75%).