The exam consists of 3 problems:
1.  An ampere’s law gives the current distribution to find the fields and examine the field
2.  Given a field distribution can you find the current distribution that created it? and can you do that with careful examination of the fields?
3.  Something like a boundary condition and a part finding the fields of surface current and a line current at a given point in space.  This would be a to see how we can use the known currents (you have the equations of the fields)and find their field at a given point….
Please contact me if you need example problems of above and you have confidence on this subject.