LPIC-1 Devices, Filesystems and FHS Practice Question
This LPIC-1 practice question tests your understanding of devices, filesystems and fhs. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which TWO statements about udev rules are correct? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Custom udev rules should be placed in /etc/udev/rules.d/.
Option A is correct because custom udev rules are placed in /etc/udev/rules.d/ to override or supplement the default rules in /lib/udev/rules.d/. This directory is the standard location for system administrators to add persistent device naming or custom actions without modifying distribution-provided files.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Custom udev rules should be placed in /etc/udev/rules.d/.
Why this is correct
Sysadmin rules go in /etc/udev/rules.d/.
Related concept
Read the scenario before looking for a memorised answer.
✗
Udev rules are only applied at boot time.
Why it's wrong here
Rules are applied when devices are added/removed, not only at boot.
✗
Udev rules can be used to schedule periodic tasks via cron.
Why it's wrong here
Udev handles device events, not periodic scheduling.
✓
Rules can match on attributes such as vendor ID and product ID.
Why this is correct
Udev rules can use ATTRS to match USB vendor and product IDs.
Related concept
Read the scenario before looking for a memorised answer.
✗
The 'udevadm verify' command tests rule syntax.
Why it's wrong here
The correct command is 'udevadm test' to simulate rule execution.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse 'udevadm verify' with a real command, but the LPIC-1 exam tests knowledge of the actual udevadm subcommands, and 'verify' is not one of them.
Trap categories for this question
Command / output trap
The correct command is 'udevadm test' to simulate rule execution.
Detailed technical explanation
How to think about this question
Under the hood, udev rules use key-value pairs to match device attributes (e.g., ATTR{vendor} or ATTRS{idProduct}) and execute actions like setting symlinks or running scripts. A subtle behavior is that rules in /etc/udev/rules.d/ are processed in lexicographical order, and a rule with a higher priority number (e.g., 99-custom.rules) runs after lower-numbered ones. In real-world scenarios, custom rules are essential for persistent network interface naming (e.g., renaming enp0s3 to eth0) or assigning fixed device paths for USB serial adapters.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the LPIC-1 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Devices, Filesystems and FHS — This question tests Devices, Filesystems and FHS — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Custom udev rules should be placed in /etc/udev/rules.d/. — Option A is correct because custom udev rules are placed in /etc/udev/rules.d/ to override or supplement the default rules in /lib/udev/rules.d/. This directory is the standard location for system administrators to add persistent device naming or custom actions without modifying distribution-provided files.
What should I do if I get this LPIC-1 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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