Question
Which of the following filesystems contains non-persistent or volatile data?
- A. /boot
- B. /usr
- C. /proc Correct
- D. /var
Explanation
/proc is a virtual (procfs) filesystem generated by the kernel in memory; it exposes process and kernel information and nothing in it is stored on disk, so it is rebuilt on every boot. /boot, /usr and /var are on persistent storage: /var holds variable data such as logs and spools, but that data survives a reboot.
