LPIC-1 Timed Practice Test 3 — 10 Questions

Question 1

A server with a udev rule fails to consistently assign a persistent network interface name. What is the most likely cause?

Accepted Answer

The network interface's MAC address is not unique or changes.. Persistent network interface names in Linux rely on udev rules that match attributes like MAC address. If the MAC address is not unique (e.g., due to a virtual machine or cloned NIC) or changes (e.g., after hardware replacement or driver update), the rule will fail to consistently identify the interface, causing the name assignment to be unpredictable.

Answer

The rule uses an incorrect operator.

Answer

The BIOS device name is configured incorrectly.

Answer

The kernel module for the NIC is not loaded.

Question 2

Which TWO of the following are valid methods to reduce boot time on a Linux system? (Select exactly 2.)

Accepted Answer

Disable unnecessary systemd services.. Disabling unnecessary systemd services reduces the number of processes that must be started during boot, directly decreasing the time spent in the target phase of systemd's parallel service activation. Each disabled service eliminates its own dependency resolution, unit loading, and execution overhead, which is especially impactful on systems with many enabled services.

Answer

Use an initramfs with minimal drivers.

Answer

Increase the kernel log level to debug.

Answer

Use ext2 instead of ext4 as the root filesystem.

Question 3

Which THREE of the following commands can be used to display information about block devices?

Accepted Answer

lsblk. A is correct because `lsblk` lists all block devices (e.g., hard drives, SSDs, partitions) by reading the sysfs filesystem and the udev database, displaying their names, sizes, and mount points. It is the primary command for viewing block device topology.

Answer

free

Answer

ip link

Question 4

A Linux administrator is managing a server that uses RPM-based package management. They need to find which installed package provides the '/etc/ssh/sshd_config' file. Which command should they use?

Accepted Answer

rpm -qf /etc/ssh/sshd_config. The correct command is `rpm -qf /etc/ssh/sshd_config`. The `-q` flag queries the RPM database, and `-f` (or `--file`) tells RPM to find which installed package owns the specified file. This is the standard way to map a file back to its originating package in RPM-based systems.

Answer

rpm -qi /etc/ssh/sshd_config

Answer

rpm -ql /etc/ssh/sshd_config

Answer

rpm -qa | grep sshd_config

Question 5

An organization uses a custom YUM repository. After adding a new RPM package to the repository, clients running 'yum update' do not see the new package. The repository metadata was regenerated using 'createrepo'. What is the most likely reason the clients are not seeing the update?

Accepted Answer

Clients have cached metadata and need to run 'yum clean all' or wait for cache expiration. Option A is correct because YUM clients cache repository metadata locally to improve performance. When a new package is added to a repository and 'createrepo' regenerates the metadata, clients will not see the update until they refresh their cached metadata. Running 'yum clean all' removes the cached metadata and forces a fresh download, or the cache will expire based on the 'metadata_expire' setting in the repo configuration (default is 6 hours).

Answer

The 'gpgcheck=1' option in the repo file prevents metadata download

Answer

The repository metadata was not signed with a GPG key

Answer

The RPM package version number is lower than the currently installed version

Question 6

Which of the following commands displays the amount of free disk space on all mounted filesystems in a human-readable format?

Accepted Answer

df -h. The `df -h` command displays disk space usage for all mounted filesystems with sizes in human-readable units (e.g., KB, MB, GB). The `-h` flag converts raw block counts into powers of 1024 with appropriate suffixes, making the output easy to interpret at a glance.

Answer

df -i

Answer

du -sh

Answer

df -T

Question 7

Which TWO of the following are valid mount options for the ext4 filesystem?

Accepted Answer

data=journal. Option B is correct because 'data=journal' is a valid mount option for ext4 that enables journaling of both metadata and file data, providing the highest level of data integrity by writing all data to the journal before the main filesystem. Option C is correct because 'noatime' is a standard mount option that disables updating the access time (atime) on inodes, reducing disk writes and improving performance.

Answer

sync

Answer

ro

Answer

noload

Question 8

A Linux system has two SATA disks: /dev/sda (250GB) and /dev/sdb (500GB). The administrator wants to create a logical volume group named 'vgdata' using partitions on both disks, then create a 600GB logical volume named 'lvdata' for a database. Which sequence of commands should be used?

Accepted Answer

pvcreate /dev/sdb1 /dev/sdc1; vgcreate vgdata /dev/sdb1 /dev/sdc1; lvcreate -L 600G -n lvdata vgdata. Option C is correct because it follows the proper LVM sequence: first create physical volumes (PVs) on the partitions /dev/sdb1 and /dev/sdc1 using pvcreate, then create the volume group 'vgdata' from those PVs using vgcreate, and finally create the logical volume 'lvdata' with a size of 600GB using lvcreate. This order ensures that the PVs exist before the VG is created, and the VG exists before the LV is created.

Answer

pvcreate /dev/sdb1 /dev/sdc1; lvcreate -L 600G -n lvdata vgdata; vgcreate vgdata /dev/sdb1 /dev/sdc1

Answer

pvcreate /dev/sdb /dev/sdc; vgcreate vgdata /dev/sdb /dev/sdc; lvcreate -L 600G -n lvdata vgdata

Answer

vgcreate vgdata /dev/sdb1 /dev/sdc1; pvcreate /dev/sdb1 /dev/sdc1; lvcreate -L 600G -n lvdata vgdata

Question 9

During boot, a Linux system displays 'Kernel panic – not syncing: VFS: Unable to mount root fs on unknown-block(0,0)'. Which of the following is the most likely cause?

Accepted Answer

The kernel lacks the necessary driver for the storage controller.. The error 'unknown-block(0,0)' indicates the kernel cannot find a device to mount as root. This typically occurs when the kernel lacks the driver for the storage controller (e.g., SATA, NVMe, SCSI host adapter) needed to access the root filesystem. Without the driver, the kernel cannot enumerate the block device, even if the root= parameter is correct and the filesystem is intact.

Answer

The root filesystem is corrupted and needs fsck.

Answer

The root= parameter in the boot loader points to a non-existent device.

Answer

The initrd is missing or corrupted.

Question 10

Refer to the exhibit. Why does the cron job fail?

Accepted Answer

The script is not executable.. C is correct because cron jobs require the script to be executable (i.e., have the execute permission bit set). If the script is not executable, cron will fail to run it even if the shebang line and PATH are correct. The error typically appears in the cron log or as a silent failure.

Answer

The cron job lacks the PATH environment variable.

Answer

The script is owned by root, but the cron job runs as a different user.

Answer

The script lacks a shebang line.