In-class notes for 11/06/2020
CS 273 (OS), Fall 2020
Optional second exam Monday in-person during class time
Topics: memory management; file systems; I/O; deadlock; sockets/pthreads/FILE (read/modify/understand)
"Risk-limited" - if you come, you can take the exam; you can decide whether to turn it in at the end.
If you take/submit the optional exam, the two exams will count equally towards your exam grade; if you don't take/submit, your grade on the first exam will be your exam grade
Project - Quick poll of your progress
Please respond by tomorrow
Project due on Saturday 11/14 at "midnight"
Help is available! (Office hours, appointments, Piazza, help sessions)
HW12, due Wednesday, with questions on deadlock.
Sample answers for designated exam-like questions tomorrow (Sat)
Exam review
Security and protection
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Be educated about security as a user, system administrator, implementer and/or designer.
Think security throughout design and implementation
Make security design simple and verifyably correct
Beware of unsafe assumptions upon which security depends.
Give the least possible access in every conceivable way.
Seriously test security
Security/convenience tradeoff.
Exercise: Think of current-day computing examples where these principles would help
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