Apple ASIC Design Engineer interview questions

I applied online the one recruiter contacted me and setup an interview. the interviewer start by asking question about my background the switched to ask technical question. They mostly prefer to ask technical questions

General questions with digital design. Some areas included Clock domain crossing, affect of voltage, temperature on mestability of flop, FIFO, implementation of dual port RAM using single port RAM. what are the different techniques to accomplish this like doubling the clock frequency, memory banking or doubling the amount of data stored in the RAM.