Questions

1. Which filesystem is used by modern operating systems?
2. What is an inode? What is inode 0 in Unix?
3. What's the difference between PID and PPID?
4. How do you terminate a process running in the background?
5. What is the difference between user and group?
6. What's the scope of the Unix permission model?
7. Can you explain the difference between signals and exit codes?
8. What's a swap file?