CompTIA Linux+ XK0-006 (V8) Practice Question

The mknod utility is used to create device special files by specifying the device type followed by its major and minor numbers. The letter c designates a character device (byte-oriented stream I/O), while b is used for block devices that perform buffered, random access. The major number tells the kernel which driver to call; the minor number is passed to that driver to select a specific sub-device. Therefore mknod /dev/mydrv c 240 0 correctly creates a character device with major 240 and minor 0. The option that uses b creates the wrong device type; reversing the numbers assigns the driver incorrectly; and touch merely creates a regular file with no special device semantics.