CS208 Introduction to Computer Systems
Monday, 11 May 2026

+ zoo questions

+ what's next?
- processes a mini intro to operating systems
    - homework: write a tiny command shell
- exam 2: Wednesday, May 20
    - assembly language
    - processes and related OS material
    - earlier stuff is still fair game
- bunch of short units
    - simple networking
    - virtual memory
    - maybe: threads
    - maybe: digital logic and a fleeting glimpse of architecture
    - buffer overflow (probably on takehome exam)

+ lab: command shells and redirection

+ stdout, stderr, stdin, exit status


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- What happens when you try "echo -n hello" in sh instead of bash or zsh, and why?

import sys

print('string? ')
s = sys.stdin.readline().strip()
print(f'my string is: {s}', file=sys.stdout)

n = int(s)
print(f'my integer is: {n}', file=sys.stdout)