Programming Question

https://csc-knu.github.io/sys-prog/books/Andrew%20…

Question#1:

Page 175, Program 18:

What is the biggest advantage of implementing threads in user space? What is the biggest disadvantage?

Question#2:

Page 174, Problem 3:

On all current computers, at least part of the interrupt handlers are written in assembly language. Why?

Question#3:

Please provide three different ways (options) of using “date” command to display the current date in “yyyy-mm-dd” format, one of three ways could be the one you used for Lab 2

Question#4: How to change a file’s access time using “touch” command? Please provide two different ways to accomplish it. (Hint: the access time of a file can be displayed by using a “stat” command.) If a file’s access time can be manually and intentionally changed, what does it mean to you? Please make any comments you might have.