Chapter 2: System Operations and Maintenance

1. B. Current interrupt (IRQ) assignments are contained in the file /proc/interrupts. Therefore, viewing the contents of the file with a command such as cat will work. There is no view command, thus making answer A incorrect. Likewise, there is no /dev/irq file, thereby making answers C and D incorrect.
2. D. Configuration files for udev are found in /etc/udev and the related /etc/udev/rules.d, which makes answer D correct. The other options do not exist.
3. B. The lsusb command is used to obtain a basic list of USB devices on a system. The other commands are not valid. In the case of answer D, the ls command is valid, but there is no --usb option.
4. C. Runlevel 1, sometimes displayed as runlevel s or S, is single-user mode, in which many services are not started. Runlevels 5 and 6 are used for other purposes, and runlevel SU is not a valid option.
5. D. Scripts are stored in /etc/init.d on a system using SysVinit. You may sometimes find these linked...