Which directory provides kernel information via a virtual filesystem?

• A. /proc
• B. /sys
• C. /dev
• D. /run

Answer: (A)

Kernel information is exposed through /proc, a procfs virtual filesystem. It presents kernel and process data as files, not as real disk files, so reading those paths queries the running kernel for current state. For example, /proc/cpuinfo shows CPU details, /proc/meminfo shows memory statistics, and /proc/version reveals the kernel version. This interface exists specifically to let user-space programs access kernel information in a simple, uniform way.

Other virtual filesystems serve related but different purposes: /sys (sysfs) exposes device and driver attributes and objects, /dev provides device nodes for interacting with hardware, and /run holds runtime data. None of these are the standard source for broad kernel information in the same way as /proc.