Ericsson interview questions

I was asked question related to Electronics and Electrical Engineering as Interviewer was also of the same educational background as me.Pen and paper approach is always welcomed by candidate for technical problem solving.Questions were not too In-Depth but meant to judge clarity of understanding on technical subjects i.e. ICT Hardware,Netwoking ETC.I was asked to explain a Bipolar Joint Transistor,Zener Diode,Ohm's law and difference between Ohmic substances and Semiconductors