It was during a recruitment day at their offices in Charleroi.Two parts a series of 10 questions to be aswered on basic Electrical engineering(RC circuit,op-amps general circuits,superposition , rectifier,resistance calculation,differential amplifier,shannon sampling theoem,boolean addition) second an inteview with a manager Goes though cv, present yourself and then he asked about identifying components on a complex circuit diagam (transistos type, op-amp, resistance, ADC...), active and passive filters , op-amp topologies and power conveters topologies