Make assumptions about them at your own risk. Many courses offered by our department as well as those offered by many other departments have prerequisites. Verify them before registering for any course. Do not limit your interaction with your professors to classroom. You will find them quite willing to help you in their offices as well.
Faculty members have office hours.
Learn the office hours of the professor you wish to visit. A trip to her or his office is not a chore. As a matter of policy, the Department of Marketing does not allow you to take the program requirements in the evening school or in a summer school. If there is an unusual situation that warrants taking a course outside the department you must receive the prior permission of the department chair. Find out when the courses you need to take are offered.