Which file contains information about partitions the OS is reading?

• A. /proc/partitions
• B. /proc/mounts
• C. /proc/swaps
• D. /etc/fstab

Answer: (A)

The file that represents the kernel’s view of the disks and their partitions is /proc/partitions. It lists the partitions the OS has discovered, including details like major/minor numbers, size, and device name, reflecting what the kernel reads from the storage devices. The other files serve different purposes: /proc/mounts shows what is currently mounted and where; /proc/swaps lists active swap areas; and /etc/fstab is a static configuration that tells the system what to mount at boot. So /proc/partitions is the one that directly contains information about the partitions the OS is reading.