Sunday, June 3, 2007

Question 27

Function Description
aPerforms I/O device-dependent processing, is provided for each type of

the device, and controls one or more devices. If a read or write I/O

request occurs, that device is directly operated and managed.
b A dedicated process handles I/O operations for which speed is not so

necessary, such as file output to a printer, or file transfer over the serial

line, allowing I/O operations and program execution to be performed in

cPerformance is improved by increasing the parallel operations for program

I/O and processing. To accomplish this, several regions are allocated in

main memory to perform I/O, and these memory regions are shared by

several programs.


Device driverBuffer pool
b) Spooling Buffer pool Device driver
c) Device driver Spooling Buffer pool
d) Device driverBuffer pool Spooling


No comments: