Question 1: (a) (1) When you do a system call, what is “called” (device, window,

Question

Question 1:

(a) (1) When you do a system call, what is “called” (device, window, or something else-what)?

(2) Please give two examples of system calls from your assignments, and in a few words describe what each does. (b) Very few tablet computers have a BIOS: (1) why not (why do some computers have a BIOS?)?

(2) Does not having a BIOS mean that they do not need device drivers?

(c) In PALM it is common to have a very large wait queue (same in phones, tablets).

1. What is waiting in a wait queue (files, disks, memory, something else)? 2. When (if ever) are they removed?

(d) On an Apple Mac, what does the “Finder” do?

Explanation / Answer

(a) (1) When you do a system call, what is “called” (device, window, or something else-what)?

Answer:

To actually perform the system call, there needs to be some way to communicate to the kernel we wish to make a system call. All architectures define an instruction, usually called break or something similar, that signals to the hardware we wish to make a system call.

(d) On an Apple Mac, what does the “Finder” do?

Answer:

It includes the Finder menu bar at the top of the screen and the desktop below that. It uses windows and icons to show you the contents of your Mac, iCloud Drive, and other storage devices. It's called the Finder because it helps you to find and organize your files.

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