Is it possible to create a timed exam in which learners can submit responses to problems but do not immediately see if the answers are correct or not? Is it possible for these learners to see if they were correct but only after submitting the entire exam/subsection?
@Yaniv_Gershon You can control the visibility of the problem results in a few ways.
Follow [7.4. Developing Course Subsections — Building and Running an Open edX Course documentation](this docs article) for more details.