They didn't say EE (electrical engineering). They said electricity and magnetism (E&M).
The AP physics curriculum has AP Physics B, AP Physics C (Mechanics), and AP Physics C (Electricity and Magnetism). At my high school (a fairly well-off public high school), in the AP Physics class, we were supposed to do both Mechanics and E&M, but we fell behind and had only just started E&M by the time the test rolled around. Some people just took the mechanics test; I took both, and got a 5, but the college I went to didn't accept AP Physics for credit, just for placement in the honors physics track. In college, E&M was the second-semester physics class in the honors track.
So, I don't think it's too unusual to expect a talented high school student or first or second year college student to have taken an E&M course.