XK0-006 Matching — 10 Questions

Question 1

Match each Linux filesystem to its typical use case.

Accepted Answer

ext4: General-purpose filesystem for Linux desktops and servers. Correct matches: ext4 for general use, XFS for large files, Btrfs for advanced features. Common confusions: swap vs tmpfs where swap is disk-based virtual memory and tmpfs is RAM-based temporary storage.

Answer

swap: Temporary filesystem stored in RAM

Answer

tmpfs: Space on disk used as virtual memory

Question 2

Match each Linux command to its primary function.

Accepted Answer

df: Display disk space usage. The correct matches are: df shows disk space, du estimates file space, fdisk manages partitions, mkfs creates filesystems. Common confusions involve mixing df/du and mount/fsck with wrong functions.

Answer

mount: Estimate file space usage

Answer

fsck: Display disk space usage

Question 3

Match each Linux networking command to its purpose.

Accepted Answer

ping: Tests network connectivity to a remote host. Ping tests connectivity, netstat shows network statistics, ifconfig configures interfaces, nslookup performs DNS queries. Traceroute traces paths, and system IP is better shown by ifconfig or hostname -I.

Answer

ping: Used to trace the route packets take to a destination

Answer

netstat: Used to display the IP address of the system

Question 4

Match each Linux boot component to its role.

Accepted Answer

GRUB: Loads the kernel and initramfs into memory. The Linux boot process: BIOS/UEFI loads GRUB → GRUB loads kernel & initramfs → kernel initializes hardware, mounts initramfs, loads drivers, then mounts real root and starts systemd → systemd manages services.

Answer

BIOS/UEFI: Initializes hardware and loads the kernel directly

Answer

systemd: Manages hardware initialization during boot

Question 5

Match each Linux runlevel to its standard systemd target.

Accepted Answer

runlevel 0: poweroff.target. Systemd targets align with traditional SysV runlevels: runlevel 0 → poweroff.target, runlevel 1 → rescue.target, runlevel 2/3/4 → multi-user.target, runlevel 5 → graphical.target, runlevel 6 → reboot.target. Common confusions involve mixing up GUI and non-GUI targets or confusing runlevels for shutdown/reboot.

Answer

runlevel 3: graphical.target

Answer

runlevel 6: rescue.target

Answer

runlevel 2: poweroff.target

Question 6

Match each Linux access control mechanism to its description.

Accepted Answer

DAC: File owners set permissions for their own files.. Correct matches: DAC relates to owner-set permissions; MAC involves system-wide policy enforcement; RBAC uses roles; ACLs extend permissions to multiple users/groups. Common confusions include swapping DAC and MAC definitions, or confusing DAC with RBAC.

Answer

DAC: Access is granted based on user roles.

Answer

MAC: File owners set permissions for their own files.

Question 7

Match each SELinux context component to its description.

Accepted Answer

user: An SELinux user identity that is authorized for a role.. SELinux contexts are structured as user:role:type:level. The user identifies the SELinux user, role defines accessible types, type controls access, and level specifies sensitivity. Common confusions involve swapping user and type definitions.

Answer

user: The security context for processes (domain) and objects.

Answer

type: An SELinux user identity that is authorized for a role.

Question 8

Match each Linux process signal to its typical action.

Accepted Answer

SIGTERM: Terminates process with cleanup. Common Linux signals include SIGTERM (graceful termination), SIGKILL (force kill), and SIGINT (interrupt via Ctrl+C). Confusions often arise between SIGTERM and SIGKILL, and between SIGINT and SIGKILL.

Answer

SIGTERM: Immediately terminates process without cleanup

Answer

SIGKILL: Interrupts process (Ctrl+C)

Question 9

Match each Linux package manager to its distribution family.

Accepted Answer

apt: Debian-based distributions. Different Linux distributions use different package managers: apt is for Debian-based, yum/dnf for Red Hat-based, and pacman for Arch Linux. Common confusions include mixing apt with Red Hat or yum with Arch.

Answer

apt: Red Hat-based distributions

Answer

yum: Arch Linux

Question 10

Match each Linux kernel parameter category to its description.

Accepted Answer

kernel: General kernel behavior and system-wide limits. Linux sysctl parameters are organized under categories such as kernel, vm, net, and fs. The kernel category handles general system limits, vm manages virtual memory, net controls networking, and fs deals with filesystem settings. Ensure each description matches its correct category.

Answer

vm: Networking parameters

Answer

kernel: Filesystem parameters