not sure if this is answered b4 anyone encountered this b4?

the interviewer askes u sum technical questions from ur uni days
u already been working 2-3years as
eg. (for electrical/electronic engineer) electronics 1 or sum electromagnetic theory which u learnt during 1st or 2nd year in uni u cant answer it cos totally forgot sum of the stuff. then he asks u wah u so fast forget wat u learnt in uni how to employ u?

how to answer this?