Currently studying for my Nav exam, and am dismayed that the mock exams are asking for mag hdg to 1 degree accuracy - sometimes with my answer splitting two of the four choices.
I certainly can't fly to a single degree accuracy, and of course the winds are never exactly as forecast once you get up there so you're unlikely to fly exactly the heading you've plotted...
Is the exam so precise?
Yes, the exams really are like that.
Bonkers, basically.