It was a basic c program mcq-10 and electrical circuits 30 questions like total resistance, total capacitance, foot to inches, cm to mm, area, length, breath, circumference, voltage across resistor r1, current across resistor, equivalent circuit, etc...

it was nice interview.basics has to be strong on subjects.since it was embedded job c progrming is important and have to be strong in aptitude also in mathematics.they are mainly looking for programming skill along with hardware and practical knowledge