Dolphin Technology Digital Circuit Design Engineer SRAM Memory interview questions

Applied online, Direct got onsite interview but didn't pay for the travel expense. Two rounds of interview. One for memory group and one for IO group. For the memory group, they asked a lot about the sense amplifier, Static Time Analysis. For the IO group, the guy just give me a sheet of questions and half an hour to finish. Then he went back to work till I finished. Questions are the same with others and not so hard.