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Scenario-based practice

Troubleshooting Scenario Questions

Practise Linux Professional Institute Certification Level 1 LPIC-1 practice questions — original exam-style scenarios covering every exam domain, with detailed explanations, wrong-answer analysis, and common exam traps.

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15
scenario questions
LPIC-1
exam code
LPI
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Scenario guide

How to approach troubleshooting scenario questions

These questions describe a network symptom and ask you to identify the root cause or the correct fix. They appear across all certification exams and reward systematic thinking over memorisation. The best candidates follow a consistent troubleshooting framework even under time pressure.

Quick answer

Troubleshooting Scenario Questions questions test whether you can apply the concept in context, not just recognise a definition.

How the topic appears in realistic exam-style scenarios.

Which detail in the question changes the correct answer.

How to eliminate plausible but wrong options.

How to connect the question back to the wider exam objective.

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Practice set

Practice scenarios

Question 1mediummultiple choice
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A system administrator notices that a server with an ext4 filesystem fails to boot after editing /etc/fstab. The error message indicates that the root filesystem cannot be mounted. Which of the following is the most likely cause?

Question 2hardmultiple choice
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The system is unable to mount a filesystem that should be identified by UUID 1234-5678. The administrator checks /etc/fstab and finds the entry: UUID=1234-5678 /data ext4 defaults 0 2. What is the most likely cause of the mount failure?

Exhibit

# ls -l /dev/disk/by-uuid/
total 0
lrwxrwxrwx 1 root root 10 Jan 10 10:00 1234-5678 -> ../../sda1
lrwxrwxrwx 1 root root 10 Jan 10 10:00 abcd-ef01 -> ../../sdb1
Question 3mediummultiple choice
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After a reboot, a server fails to obtain an IP address on its sole ethernet interface. The administrator checks /etc/netplan/01-netcfg.yaml and finds the configuration looks correct. However, the interface shows no IP. The system uses systemd-networkd. Which command should be run next to apply the configuration and bring up the interface?

Question 4hardmultiple choice
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A system administrator is troubleshooting a server where the /var partition is full, causing services to fail. The administrator deletes old log files in /var/log, but the available space does not increase. Which step should be taken next?

Question 5mediummultiple choice
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A technician is troubleshooting a system that fails to boot with the error 'Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)'. What is the most likely cause?

Question 6mediummultiple choice
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A senior administrator runs a script that processes a CSV file. The script contains the following snippet: 'for field in $(cat data.csv); do ...'. The data.csv file contains lines like: 'John Doe, 123 Main St, Springfield'. The script fails to process correctly, splitting fields incorrectly and causing errors. Which of the following is the most appropriate fix?

Question 7mediummultiple choice
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A system fails to mount an XFS filesystem with the entry in /etc/fstab. The entry looks correct. Which fstab field might be missing or incorrect?

Question 8mediummultiple choice
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You manage a CentOS 7 server that runs a critical application storing data on an XFS filesystem mounted at /data. The server experiences an unexpected power outage. After rebooting, the application fails to start, and you suspect filesystem corruption. You boot into single-user mode and attempt to mount /data, but the mount fails with an error: 'mount: /dev/sdb1: can't read superblock'. You run 'xfs_repair -n /dev/sdb1' and it reports the log is dirty and must be replayed or the filesystem repaired with the -L option (force log zeroing). You want to recover the filesystem with minimal data loss. Which action should you take?

Question 9mediummultiple choice
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A Linux administrator manages a server that runs a custom application requiring a specific kernel module to be loaded at boot. The server uses SysV init and has the module listed in /etc/modules. However, after a recent kernel update, the module fails to load automatically at boot. The administrator can manually load the module with 'modprobe <module>' after the system is running. The application depends on this module being loaded before any network services start. Which of the following actions should the administrator take to ensure the module loads automatically at the correct time during boot?

Question 10hardmultiple choice
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A system administrator is responsible for a Linux server running a critical application. The server recently experienced an unplanned power outage. Upon rebooting, the system fails to reach the default target and drops into an emergency shell. The administrator notices that the root filesystem (/) is mounted read-only. The /etc/fstab file contains the following lines:

UUID=abc123 / ext4 errors=remount-ro 0 1 UUID=def456 /home ext4 defaults 0 2 UUID=ghi789 none swap sw 0 0

The administrator suspects that the /home filesystem has a corrupt superblock and is causing the boot failure. The administrator needs to check and repair the /home filesystem without causing data loss. Which of the following is the correct course of action?

Question 11easymultiple choice
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A technician is troubleshooting network connectivity. The server's IP is 192.168.1.10/24, and the gateway is 192.168.1.1. The server can ping the gateway but cannot ping 8.8.8.8. Which command is most appropriate to check if the default route is configured?

Question 12mediummultiple choice
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A server with a udev rule fails to consistently assign a persistent network interface name. What is the most likely cause?

Question 13hardmulti select
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A system administrator is troubleshooting a package dependency issue on a Debian system. Which three commands can be used to display dependency information for a package? (Choose three.)

Question 14easymultiple choice
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A system administrator notices that after updating the kernel, the system fails to boot. The administrator wants to boot the previous kernel. Which GRUB menu option should be selected?

Question 15easymultiple choice
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A Linux system fails to boot after installing a new kernel. Which step should be taken first to recover the system?

These LPIC-1 practice questions are part of Courseiva's free LPI certification practice question bank. Courseiva provides original exam-style LPIC-1 questions with detailed explanations, topic-based practice, mock exams, readiness tracking, and study analytics.