Question

The system is notified of a read or write operation by ___________

(a) Appending an extra bit of the address

(b) Enabling the read or write bits of the devices

(c) Raising an appropriate interrupt signal

(d) Sending a special signal along the BUS

I got this question in class test.

This intriguing question comes from Accessing I/O Devices in portion Input/Output Organisation of Computer Architecture

Answer 1

Correct option is (d) Sending a special signal along the BUS

Easy explanation: It is necessary for the processor to send a signal intimating the request as either read or write.