Quoting from the syllabus: "You are welcome to discuss the assignments with your classmates at a conceptual level, but all answers should be written in your own words based on your own understanding of the material. If you do work with a classmate on an assignment, you must acknowledge that fact on your submission."
open system call in UNIX absolutely essential?
What would the consequences be of not having it? (This question is
taken from Tanenbaum's Modern Operating Systems.)