Learning Goal: I’m working on a operating systems test / quiz prep and need an explanation and answer to help me learn.I will send the book and some notes with a brief preview, I need you to be here at 10:50 am to 11:45am EST on Friday so I can send you the questions and you send me the answers during that time the exam topics are here- C code – Manipulate arrays (like integer arrays) – Manipulate strings (character arrays) with string functions, and without functions – Work with argc and argv – Open, read, write, close files – Read input from keyboard- Processes (ch 4 & 5): – Fix broken code that does a fork/exec/wait pattern (perhaps missing some steps) – Explain a zombie is made, and how it is avoided – How to make a process execute two different kinds of code (e.g., some code that computes numbers, other code that interacts with user). – How to run another program (like the shell does) – Answer questions about a process state table like Figure 4.4 in Ch 4 in OSTEP book- Time-sharing, “limited direct execution” (ch 6; stop at page 9): – Explain difference between user mode and kernel mode, and how to switch from user to kernel – Identify which “ring” goes with which mode – Explain purpose of “trap table”, and when it is created and by what (answer: OS) – Explain a figure like 6.2 (ch 6 in OSTEP), ignoring “kernel stack” parts – How process switching works: given a story, explain if it’s a “cooperative” approach or “non-cooperative” approach – Explain how non-cooperative mode works
Requirements: the exam time is 45 minutes
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