Did Harry, Ron and Hermione ever graduate?

They skipped their final year of Hogwarts to go chasing horcruxes but were they then required to go back and re-do their final year to pass the exams? And what about the other students whose curriculum was all messed up during that year? Did everyone in the magical world just accept that they took down Voldy and let them through? I mean Hermione was probably already pass that point in her learning but the other two could have missed some important knowledge. What do you think?