CompTIA Linux+ Test System Architecture Flashcards

Which BIOS/UEFI setting must be enabled to allow a 64-bit Linux OS to use hardware-assisted virtualization?

Answer: Intel VT-x or AMD-V

Intel VT-x (Intel) or AMD-V (AMD) are the CPU extensions required for hardware-assisted virtualization in a 64-bit Linux environment.

What is the purpose of the /proc/cmdline file on a running Linux system?

Answer: Displays kernel parameters passed at boot time

/proc/cmdline shows the exact command-line parameters the bootloader passed to the kernel during the current boot.

A system boots successfully but the hardware clock is 5 hours ahead of the system clock. Which command corrects the hardware clock to match the current system time?

Answer: hwclock --systohc

hwclock --systohc writes the current system time to the hardware (CMOS) clock.

Which IRQ number is traditionally assigned to the primary ATA/IDE controller on legacy x86 systems?

Answer: 14

IRQ 14 is the traditional IRQ for the primary IDE/ATA controller on legacy x86 hardware.

A Linux administrator needs to view which I/O ports are currently in use by the kernel. Which file provides this information?

Answer: /proc/ioports

/proc/ioports lists the I/O port ranges currently allocated to kernel devices.

What does the kernel parameter 'nomodeset' do when added to the GRUB boot line?

Answer: Disables kernel mode-setting, forcing basic video drivers

nomodeset prevents the kernel from loading GPU kernel mode-setting drivers, falling back to a basic framebuffer, useful for graphics troubleshooting.

Which systemd target is the closest equivalent to the legacy SysV runlevel 3 (multi-user, no GUI)?

Answer: multi-user.target

multi-user.target corresponds to SysV runlevel 3: full multi-user mode with networking but without a graphical display manager.