OS I/O Systems

bytes one by one

block of bytes as a unit

with unpredictable response times

none of the mentioned

CPU

OS

kernel

shell

system in, system out

data in, data out

flow in, flow out

input, output

interrupt driven I/O is more efficient than programmed I/O

programmed I/O is more efficient than interrupt driven I/O

both programmed and interrupt driven I/O are equally efficient

none of the mentioned

errors

exceptions

interrupt handlers

all of the mentioned

process table

open file table

close file table

all of the mentioned

port

node

bus

none of the mentioned

nonmaskable interrupt

blocked interrupt

maskable interrupt

none of the mentioned

CPU

Monitor

Wirefull

Bus

status

control

data in

data out