interview mania

friends .....i have an interview lined up for me in two days kindly help me out with some basic electrical and electronic questions like what is a drive .its function and how does it control speed and torque of a motor. then about operational amplifier ,its function and its application about industrial UPS and about logic gates like which is the universal gate and fiinally some basics like ohms law , kirchoffs law and other basic laws..................
Please help me out................