Some courses cover one concept and then move on to a completely new concept.
The new concept doesn't require you to use the previously learned concept and you can just forget the previously learned material after the test because you won't be using it again. In General Chemistry one concept builds on another. The only bad questions are those that are not asked, and those that are very broad and general. If you don't ask any questions, you are telling us that you understand the material fully, don't need any more instruction, and are ready to move on. On the other hand, if you ask very broad , non-specific questions we will be unable to rephrase our explanation.