intro

Question 1

what are some of the roles of the os

Answer 1

manages hardware and system resources
shares and accounts for resources
offers secure environment for apps and services
provides known environment for app developers and users
provides knows device and i/o system for hardware developers

Question 2

what are some benefits of having an operating system

Answer 2

user code doesnt have to manage everything about the machine
stops code from having unconstrained access as there would be no independence security or resource control
simplifies development

Question 3

what does the os include

Answer 3

kernel and system library interface

Question 4

what are the 3 types of os

Answer 4

embedded /real time
sserver
desktop

Question 5

what does the emebedded/real time os focus on

Answer 5

long term reliability and strict timing guarantees
small footprint and no unnecessary code
certification process for safety critical systems

Question 6

what does the server os focus on

Answer 6

fairly sharing resources
reliability

Question 7

what does the desktop os focus on

Answer 7

interactivity
gui and graphics/media

Question 8

software abstraction

Answer 8

the os allows you to write programs that can run on different machines

Question 9

hardware abstraction

Answer 9

allows you to hide hardware differences from the os
dont need to have different os versions for different machines

Question 10

what is backwards compatibility and what is used to make it work

Answer 10

making new memory look like the old memory structure in order to run old code
the spare wire on the keyboard is used as a switch between old and new memory