Description

• Write in a neat and legible handwriting
• Clearly explain the reasoning process
• Write in a complete style (subject, verb and object) Progamming exercises:
• Write a README file for each program
• Upload an archive with all the programs onto Canvas
Ex. 1 — Revisions
Explain the difference between the stack and the heap.
Ex. 2 — Personal research
1. Briefly explain what operations are performed when a computer is powered on. What is the role of the BIOS and how does it interact with the OS?
2. In a few words explain what are hybrid and exo kernels.
Ex. 3 — Course application
1. Which of the following instructions should only be allowed in kernel mode? Explain.
a) Disable all interrupts c) Set the time-of-day clock
b) Read the time-of-day clock d) Change the memory map
Ex. 4 — Simple problem
One reason GUIs were initially slow to be adopted was the cost of the hardware needed to support them. How much video RAM is needed to support a 25 lines by 80 rows character monochrome text screen? How much for a 1024 x 768 pixel 24-bit color bitmap? Assuming the cost of this RAM in the 1980es was $5/KB what was the price of those two solutions? How much is it now?
Ex. 5 — Command lines on a Unix system On Minix3 use the command line to:
1. Create a new user
2. List all the currently running processes
3. Display the characteristics of the CPU and the available memory
4. Redirect some random output into two different files
5. Concatenate the two previous files
6. Read the content of the resulting file as hexdecimal values (in other words find a command to read a file as hexadecimal values)
7. Use a single command to find all the files in /usr/src with the word semaphore in their name and containing the word ddekit_sem_down
Note: follow the “programming exercises” guidelines and save the list of commands in a shell file (.sh).