What is load exactly? What does it mean? Discussions on threads and processes. How can two processes communicate with one another? [...] I was not prepared f

What is load exactly? What does it mean? Discussions on threads and processes. How can two processes communicate with one another? [...] I was not prepared for some of these questions, since some of these questions were Computer Science fundamental. I enjoyed this article, and I rooted for the author to get the job, but I was somewhat confused by this part of the article. Perhaps the questions he mentioned weren't what he considered to be "Computer Science fundamental", but were there just for flavor. The questions mentioned seem more like Unix fundamental -- the load one in particular I ask almost every time I interview a sysadmin.