CSC $2260$ Introduction to Operating Systems

Homework #$1$

Part $1$: Answer the questions below $[100$ points$]$

$1.$ What is the structure of a computer system?

$2.$ What are the three main purposes of an operating system?

$3.$ What is the bootstrap program and where is it stored?

$4.$ What is an interrupt?

$5.$ How does the distinction between kernel mode and user mode function as a rudimentary

form of protection $($security$)?$

$6.$ Give two reasons why caches are useful. What problems do they solve?

$7.$ What is the main difficulty that a programmer must overcome in writing an operating system

for a real$-$time environment?

$8.$ Distinguish between the client$$server and peer$-$to$-$peer models of distributed systems.

$9.$ What is system calls and what is the purpose of system calls?

$10.$ List five services provided by an operating system and explain how each creates

convenience for users. In which cases would it be impossible for user$-$level programs to

provide these services? Explain your answer.