Question

MOSI means __________

(a) Line for master to send data to the slave

(b) Line for the slave to send data to the master

(c) Line for the clock signal

(d) Line for the master to select which slave to send data to

The question was posed to me during an online interview.

This intriguing question originated from SPI Protocol topic in portion Internet Principles of IOT

Answer 1

Right answer is (a) Line for master to send data to the slave

To explain: MOSI is the logic signal. The data will be sent to the slave from master.