Quiz 2

Question 1

a message passing model is: easier to implement than shared memory model for intercomputer communication, only useful for small simple operating systems, a network protocol and does not apply to operating systems, is faster than the shared memory model

Answer 1

only useful for small simple operating systems

Question 2

the major difficulty in designing a layered operating system approach is

Answer 2

appropriately defining the various layers

Question 3

a microkernel is a kernel

Answer 3

that is stripped of all nonessential components

Question 4

which is not an example of a benefit of virtual machines: ability to concurrently run several different operating systems, ability to run several different operating systems that all share the same hardware, protects the host system from guest operating system, uses less physical memory than an actual operating system

Answer 4

uses less physical memory than an actual operating system

Question 5

what are techniques for passing parameters from an application to a system call

Answer 5

stack, registers, special blocks in memory (NOT cache memory)

Question 6

what provides an interface to the services provided by an operating system

Answer 6

system calls

Question 7

a spinlock

Answer 7

does not require a context switch when a process must wait on a lock

Question 8

when a process creates a new process using the fork() operation what states is shared between parent process and the child process if possible?

Answer 8

shared memory segments