CS 3733 Operating Systems, Spring 2002 Midterm Comments

Grades:
90-100: 9
80-89: 5
70-79: 17
60-69: 6
below 60: 9

• Problem 1: The inode is stored on disk, but for open files a copy is kept in memory, so if your said that the inode was in system space, it was OK.
• Problem 2: This problem gave students a lot of trouble. You should know about memory leaks from Assignment 1.
• Problem 3: A problem like this appeared in the notes on fork, wait, and exec.
• Problem 4: You got 4 points for understanding that Process A always reads a and b. You got 4 points for undestanding that Process B and C together read a, b, c, and d.
• Problem 5: This was like the problem from class that was put on the web.
• Problem 6: Each entry in the table was worth 1 point.