CH2

Question 1

The User Interface (UI) can be __________ or __________ or _______.

Answer 1

Command-Line (CLI), Graphics User Interface (GUI), Batch.

Question 2

Which of the following is NOT a service that exists to ensure efficient OS operation:
a) resource allocation b) accounting
c) protection and security
d) none of the above

Answer 2

d) none of the above.

They are all services that exist to ensure efficent OS operation

Question 3

Most system calls are accessed by _____________ such as Win32, POSIX, Java

Answer 3

Application Program Interface (API)

Question 4

T/F: Usually there is a number associated with each system call.

Answer 4

True.

Question 5

System call interface maintains a table indexed according to the _____________.

Answer 5

System call number

Question 6

Parameters may need to be passed to the OS during a system call, it may be done by passing in ________, address of parameter stored in a ______, pushed onto the _______ by the program and popped off by the OS.

Answer 6

registers, block, stack

Question 7

T/F: Block and stack methods limit the number or length of parameters being passed.

Answer 7

False, They do not.

Question 8

_________ system calls include: end, abort, load, execute, create/terminate process, wait, allocate/free memory.

Answer 8

Process control

Question 9

___________ system calls include: create/delete
file, open/close file, read, write, get/set attributes

Answer 9

File management

Question 10

__________ system calls: request/release
device, read, write, logically attach/detach devices.

Answer 10

Device management

Question 11

___________ system calls: get/set time,
get/set system data, get/set process/file/device attributes.

Answer 11

Information maintenance

Question 12

__________ calls: create/delete
communication connection, send/receive, transfer status
information.

Answer 12

Communications system

Question 13

_______________ uses layered approach, treats hardware and the OS kernel as though they were all
hardware.

Answer 13

Virtual machine

Question 14

The OS layered approach is where the operating system is divided into a number of layers (levels), each built on top of lower layers. The bottom layer (layer 0), is the __________; the highest (layer N) is _________.

Answer 14

hardware, the user interface.

Question 15

T/F: In the OS layered approach with modularity, layers are selected such that each uses functions (operations) and services of only
higher-level layers.

Answer 15

F. lower-level.