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A design must talk to three sensors on one two-wire bus, sharing the wires. The interface is

  • A.I2C
  • B.SPI
  • C.UART
  • D.CAN

Answer: A

Two wires with addressing built in is exactly what I2C provides, and three devices on one bus is its ordinary case. SPI would need a select line for each device and CAN needs transceivers and is aimed at long buses between boards.

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