Do you mean within the actual same course, as in on your timetable, for example:
ABC101, lecture, 4pm tuesday
ABC101, tutorial, 4pm tuesday,
OR
Do you mean within the same degree between different compulsary courses in that program, say Bachelor of Something, where ABC101 and ABC102 are both compulsary courses you have to do that clash?
In the first case, it means they alternate on different weeks and you'll find out in the course outline which week has what, and in the second case it means you're like me and the university are morons.