What is the function of data input command in I/O command?
AActivate the peripheral and to inform it what to do
BTo check status conditions in the interface and the peripheral
CIt cause the interface to respond by transferring data from bus into one of its registers
DIt cause the interface to respond by transferring data from one of its register to bus
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Correct answer: (D) It cause the interface to respond by transferring data from one of its register to bus
Explanation
On a data input command the interface takes the data received from the peripheral into its buffer register and places it from that register onto the data bus, so the CPU can read it.
From DSSSB PGT Computer Science PYQ (Technical), 11 Jul 2021