Linux Basics XK0-006 Practice Questions (Page 6)

Questions 26–30

1. 26foundation · easy

   What is a key feature of journaling filesystems like ext4 and XFS?

   • AThey record changes in a journal to help recover from crashes.
   • BThey are only used for network storage.
   • CThey do not support file permissions.
   • DThey prevent all data loss.
   Reveal Solution Discussion Select an answer first
2. 27expert · medium

   A server fails to boot, and the administrator sees the error 'Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)'. The administrator suspects the initramfs is missing or corrupted. Which action should be taken first?

   • ARun `fsck` on the root filesystem.
   • BEdit the kernel command line to add `root=/dev/sda1`.
   • CReinstall the boot loader using `grub2-install`.
   • DRebuild the initramfs using `dracut` or `mkinitrd`.
   Reveal Solution Discussion Select an answer first
4. 28application · medium

   A Linux system with systemd fails to boot to a login prompt. The administrator sees a message that a critical filesystem failed to mount. Which command should the administrator run at the initramfs rescue shell to investigate the issue?

   • A`fdisk -l`
   • B`journalctl -xb`
   • C`systemctl list-units --failed`
   • D`blkid`
   Reveal Solution Discussion Select an answer first
5. 29foundation · easy

   What is the primary role of the init system in a Linux system?

   • ATo provide a graphical user interface.
   • BTo load the kernel into memory.
   • CTo start and manage system services and processes.
   • DTo initialize hardware devices.
   Reveal Solution Discussion Select an answer first
6. 30foundation · easy

   How do user applications interact with the Linux kernel?

   • AThrough the GRUB command line.
   • BBy directly accessing hardware memory addresses.
   • CBy writing to the BIOS configuration.
   • DThrough system calls.
   Reveal Solution Discussion Select an answer first