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Apple On-site interview process

Disclaimer: all information are from public online resources!

1st round

• Hiring Manager round
• Two people
• Talk about resume - 30 Minuts
• Implement atoi()

2nd round

• Two people
• Given a 1-D array (matrix) and coordinate of center and radius, then draw the circle (mark all 1 in the circle area matrix).
  • Tips: Search 2D array
  • Calculate coordinate and calculate distance with the center

3rd round

• Two people
• GPIO sensor interrupt question:
  • Given 8 sensor on the wheel, Calculate distance travel by the wheel
  • forward/backward? -> 8 bit pattern

4th round

• Two people
• Implement Ring Buffer

5th round

• Two people
• Talk about resume for a long time
• WERID QUESTION:
  • #def HIGH_THRES 100
  • #def DELTA_THRES 0.2
  • Given api call_alarm(), check_data(double temp, time_t timestamp)
  • Question: if temp > HIGH_THRES or delta_val > DELTA_THRES, call call_alarm()
  • What concerns do you have? what if the data reading is very noisy?