LPIC-1 Practice Test 12 — 15 Questions

Question 1

Refer to the exhibit. An administrator attempts to remount /mnt as read-only but receives the error shown. What is the most likely cause?

Accepted Answer

The /mnt directory is not a mount point. The error 'mount: /mnt is not a mount point' indicates that the administrator attempted to use the `remount` option on a directory that is not currently a mount point. The `mount -o remount` command only works on directories where a filesystem is already mounted; it modifies the mount options of an existing mount, not a regular directory. Since /mnt is not a mount point, the kernel rejects the operation with this specific error.

Answer

The /mnt directory is not empty

Answer

The /mnt directory does not exist

Answer

The filesystem is already mounted read-only

Question 2

After connecting a USB device, the system does not create a device node in /dev. Which command can be used to trigger udev to re-evaluate the device?

Accepted Answer

udevadm trigger. The correct command is `udevadm trigger`. This command causes udev to re-evaluate all devices by simulating kernel uevents, which forces udev to process rules and create device nodes in /dev for devices that were missed or not properly initialized.

Answer

modprobe

Answer

udevadm control --reload

Answer

udevadm settle

Question 3

A user needs to schedule a backup script to run every weekday at 2:00 AM. Which command should they use to set up this recurring job?

Accepted Answer

crontab -e and add a line. The cron daemon is the standard Linux tool for scheduling recurring jobs at specific times. Using `crontab -e` allows the user to edit their personal crontab file and add a line like `0 2 * * 1-5 /path/to/backup.sh` to run the script every weekday (Monday through Friday) at 2:00 AM.

Answer

sleep 3600 && ./backup.sh

Answer

at -f backup.sh 2:00

Answer

batch

Question 4

Refer to the exhibit. The remount command fails. What is the most likely cause?

Accepted Answer

The filesystem is not mounted.. The remount command fails because the filesystem is not mounted. 'mount -o remount' only works on filesystems that are already mounted. The lack of the 'noauto' option in the fstab entry is irrelevant; it only affects automatic mounting at boot and does not influence whether a remount can be performed on an unmounted filesystem. Candidates may incorrectly believe that the missing 'noauto' is the cause, but the real issue is that the filesystem needs to be mounted first.

Answer

The filesystem type is wrong.

Answer

The fstab entry lacks the 'noauto' option but the device is not currently mounted.

Answer

The mount point /data does not exist.

Question 5

Based on the exhibit, which of the following is true about the cleanup.sh job?

Accepted Answer

It runs at 4:30 AM on Monday through Friday. The cron expression `30 4 * * 1-5` specifies that the job runs at minute 30, hour 4 (4:30 AM), every day of month (*), every month (*), but only on days of the week 1 through 5 (Monday=1, Tuesday=2, Wednesday=3, Thursday=4, Friday=5). Therefore, the job runs at 4:30 AM on Monday through Friday.

Answer

It runs at 4:30 AM every day

Answer

It runs at 4:00 AM on weekdays

Answer

It runs at 4:30 AM on weekends

Question 6

Which TWO of the following are Debian package management tools?

Accepted Answer

dpkg. Option B, dpkg, is correct because it is the low-level Debian package manager that installs, removes, and queries .deb packages on Debian-based systems. Option D, apt, is correct because it is the high-level Debian package management front end that resolves dependencies and works with repositories, typically invoking dpkg underneath. The unmarked options do not belong: yum (A) and rpm (C) are Red Hat–family tools for RPM-based distributions, and zypper (E) is the package manager for SUSE/openSUSE, not Debian.

Answer

yum

Answer

rpm

Answer

zypper

Question 7

A system administrator is troubleshooting a Linux server that fails to boot. The server has a software RAID 1 configuration using mdadm, with the root filesystem located on /dev/md0. During boot, the system halts with the following error: 'VFS: Unable to mount root fs on unknown-block(0,0)'. The admin verifies that the BIOS recognizes all disks and that the RAID array was properly assembled prior to the last shutdown. The system was working after a recent kernel update, but now fails. Which of the following actions is the most likely solution?

Accepted Answer

Rebuild the initramfs to include the mdadm module and the RAID metadata.. After a kernel update, the new kernel may lack the necessary mdadm module or RAID metadata support in the initramfs. The error 'unknown-block(0,0)' indicates the kernel cannot find the root device because the initramfs does not contain the required RAID drivers or assembly instructions. Rebuilding the initramfs with the correct mdadm configuration ensures the kernel can assemble and mount /dev/md0 during boot.

Answer

Use a live CD to run fsck on /dev/md0.

Answer

Check the /etc/fstab file for incorrect root device.

Answer

Reinstall the bootloader on the MBR.

Question 8

Which three files are essential for network configuration and name resolution on a typical Linux system? (Choose three.)

Accepted Answer

/etc/hosts. The `/etc/hosts` file provides static hostname-to-IP address mapping, allowing name resolution before DNS is queried. It is essential for local network configuration and fallback resolution, as defined by RFC 952 and the glibc Name Service Switch (NSS) framework.

Answer

/etc/network/interfaces

Answer

/etc/sysctl.conf

Question 9

Order the steps to mount an NFS share from a remote server.

Accepted Answer

Install NFS client, then create mount point directory, then run mount command, then verify the mount. NFS mounting requires the client package, a local directory, and the mount command with server and export path.

Answer

Create mount point directory, then install NFS client, then run mount command, then verify the mount

Answer

Install NFS client, then run mount command, then create mount point directory, then verify the mount

Answer

Run mount command, then install NFS client, then create mount point directory, then verify the mount

Question 10

Refer to the exhibit. When will the backup script run?

Accepted Answer

Monthly at 4:30 AM on the 1st. The cron entry `30 4 1 * * /usr/local/bin/backup.sh` specifies that the script runs when the minute is 30, hour is 4, and day-of-month is 1, with the month and day-of-week fields set to `*` (meaning every month and every day of the week). This results in execution at 4:30 AM on the 1st day of every month, making option B correct.

Answer

Daily at 4:30 AM

Answer

Yearly at 4:30 AM

Answer

Weekly at 4:30 AM

Question 11

A dependency analysis shows that removing package 'libfoo' will also remove 'appA' and 'appB' because they depend on libfoo. The administrator wants to remove libfoo but keep appA and appB. What is the best approach?

Accepted Answer

Check if a compatible alternative package exists and install it, then remove libfoo.. The best approach is to find a compatible alternative package that provides the same functionality as libfoo, install it, and then remove libfoo. This satisfies the dependency requirements of appA and appB through the replacement package, allowing libfoo to be removed without breaking the dependent applications. This is the standard, non-destructive way to resolve dependency conflicts on Debian-based systems.

Answer

Force removal of libfoo using `dpkg --force-depends`.

Answer

Recompile appA and appB without the dependency on libfoo.

Answer

Use `apt-get remove libfoo --no-dep`

Question 12

Which command lists all installed packages on a Debian-based system by querying the dpkg database?

Accepted Answer

dpkg --get-selections. `dpkg --get-selections` queries the dpkg database directly and outputs a list of all installed packages along with their installation state (e.g., 'install'). This command does not rely on remote repositories or cache files, making it a reliable method for listing installed packages on a Debian-based system.

Answer

apt-cache search .

Answer

dpkg -L

Answer

apt-show-versions

Question 13

Refer to the exhibit. An administrator is trying to install Google Chrome but receives a GPG error. Which command should be run to add the repository's GPG key?

Accepted Answer

`wget -qO- https://dl.google.com/linux/linux_signing_key.pub | sudo apt-key add -`. It downloads the Google Linux signing key from the official URL and pipes it directly into `apt-key add`, which imports the key into APT's trusted keyring. This resolves the GPG error by allowing APT to verify the authenticity of packages from the Google Chrome repository.

Answer

`gpg --import https://dl.google.com/linux/linux_signing_key.pub`

Answer

`apt-key adv --keyserver keyserver.ubuntu.com --recv-keys <keyid>`

Answer

`dpkg --add-key google`

Question 14

A system administrator notices that a server with a freshly installed Linux system fails to boot with the error 'No bootable device found'. The server has a single SATA hard disk connected to the motherboard's SATA controller. Which of the following is the most likely cause of this issue?

Accepted Answer

The BIOS boot order is set to a device that does not contain a bootable operating system.. The error 'No bootable device found' occurs during the BIOS/UEFI POST phase, before any bootloader is loaded. This indicates that the system firmware cannot find a valid boot sector on any device in its boot order. Since the server has a single SATA hard disk, the most likely cause is that the BIOS boot order is set to a different device (e.g., a network boot or removable media) that does not contain a bootable operating system, or the hard disk itself is not listed first in the boot priority.

Answer

The root filesystem is formatted with an unsupported filesystem type.

Answer

The kernel module for the SATA controller is not included in the initramfs.

Answer

The GRUB bootloader configuration file is missing or corrupted.

Question 15

Which hardware component uses a unique address to identify itself on the network at the data link layer?

Accepted Answer

MAC address. The MAC address (Media Access Control) is a unique 48-bit identifier burned into the network interface controller (NIC) by the manufacturer. It operates at Layer 2 (data link layer) of the OSI model, enabling devices on the same local network segment to communicate directly using protocols like Ethernet or Wi-Fi.

Answer

IP address

Answer

Hostname

Answer

Port number