They ask the basic question of electronic such as What AC, DC?
What is a resistor?
transistor, know the basic of electronic.
They ask me to draw and boolen the AND, OR, NOR gates.
What firmware, ROM,RAM, ASCI
What operating system are you familiar with?
They ask you question base off on your Resumes,
for ex: What the hardest project you ever done that have difficulties. And what was the solution and result