1. An OS is intimately tied to what ? Describe what it is tied to and the components.

2. What is a process
   1. what does it contain
   2. what are its various states
   3. what is contained in a PCB.
   4. Describe what happens when a process is created
3. What is a thread.
   1. What are multi threaded processes ?
   2. What are the benefits of threads. Describe them in detail.
4. Describe the items shared by all threads in a process. What are the items which are private to each thread.
5. On all current computers, at least part of the interrupt handlers are written in assembly language. Why?