Lecture recordings from previous semesters that are relevant to topics from this exam are linked below (links will be activated as we complete each topic in class). Only a few are from 439 (Spring 2014): those recordings include the first day, the last lecture on synchronization, and the exam review sessions from Spring 2015.
Below those are lecture recordings of lectures from the old CS372 course on the relevant topics for Exam 1. CS372 had *much* more focus on CPU scheduling than CS439. It also covered Peterson's Algorithm, which we did not.
For this exam, some of the Spring 2015 lectures were successfully recorded. For any that weren't, I've posted the recordings from Spring 2014. (Links will be activated as we complete each topic in class.)