I was first asked about proof of details. We looked over my CV and I explained everything I had written. Then they asked about different situations at my job and how I corresponded. Some closing questions like how much I am paid, if I had booked any holidays, the notice I have to give to my current employer etc. In the end I had to be tested for my knowledge as engineer. One hour multiple choice questions about electronics (electronic circuits with inductors, resistors, capacitors), IT and networks etc.