They are known as close-ended questions because you need to provide a yes/no or true/false answer to the given statements. A lot of students actually prefer this type of questions because they have a chance to get the answer right even if they have no idea about the details that are being asked.
Open-ended questions would usually require more explanations about the question that was asked. A student may be judged depending on how well the answer questions. There are some who may get points for this type of question even if their answers were not accurate.