multiple-choice tests do not allow much, if any, room for error. The answer choice is either right, or it is wrong; there is no gray area. If individuals read information into the question, he or she is going to run into problems rather quickly.
Open-ended questions generally require the student to provide a response. Now, if one is a convincing and a well-written individual, he or she is likely to have an easier time getting the teacher to see his or her point. Some students have the ability to write “fluff” and to make their fluff sound very logical and very sensible.
The shortcoming of open-ended questions is that a student may not have any idea as to what the question is going to consist of. Usually a test is composed of just a few open-ended questions as compared to 50 to 100 question multiple-choice assessment.