Question

In memory-mapped I/O ____________

(a) The I/O devices and the memory share the same address space

(b) The I/O devices have a separate address space

(c) The memory and I/O devices have an associated address space

(d) A part of the memory is specifically set aside for the I/O operation

The question was posed to me during a job interview.

My question is from Accessing I/O Devices in chapter Input/Output Organisation of Computer Architecture

Answer 1

Correct answer is (a) The I/O devices and the memory share the same address space

The explanation: Its the different modes of accessing the i/o devices.