If it was me I would fail the whole course because all my subjects require a minimum of 40-50% in the final exam to pass. I guess it just depends on your uni/course.what hapens if you pass every other component for one of your units, but for that unit you fail an exam worth 40%? like you pass everything except an exam worth 40%..........
I wonder why courses wouldn't have this requirement... if you can't even score 40%, it doesn't seem right that you would pass and be qualified at whatever it is.It will say in your course outline. For some courses you HAVE to pass the final to pass the unit. Although my gut feeling is that they are lenient on that issue.
At any rate, don't be so pessimistic for the time being.