LPIC-1 Devices, Filesystems and FHS Practice Question
This LPIC-1 practice question tests your understanding of devices, filesystems and fhs. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
A company runs a web server on Linux with two hard disks: /dev/sda (500GB) and /dev/sdb (500GB). The root filesystem is on /dev/sda1, and /var is on /dev/sda2. The administrator wants to add a new disk /dev/sdc (500GB) to be used as additional storage for /var/www/html. The new disk should be configured as an LVM physical volume and added to an existing volume group named 'vg_web'. The volume group currently has 200GB free space from /dev/sdb1. The administrator intends to extend the logical volume 'lv_web' mounted at /var/www/html by 300GB. Which of the following is the correct sequence of commands to achieve this without data loss?
Option D is correct because it follows the proper sequence: create a physical volume on the partition /dev/sdc1, extend the volume group vg_web with it, then extend the logical volume lv_web by 300GB, and finally resize the filesystem with resize2fs to utilize the new space. Since the logical volume is mounted and contains data, the filesystem must be resized after extending the LV to avoid data loss. The --resizefs flag in option C would also work, but the question asks for the correct sequence without that flag, and option D explicitly includes the separate resize2fs step.
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.
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often forget the filesystem resize step (resize2fs) after extending the logical volume, assuming lvextend alone is sufficient, or they mistakenly think --resizefs is always available or the only correct method, when in fact the explicit resize2fs is the traditional and more portable approach.
Detailed technical explanation
How to think about this question
Under the hood, LVM separates physical storage from logical volumes, allowing flexible resizing. When extending a logical volume with lvextend -L +300G, the LV metadata is updated, but the filesystem superblock still reflects the old size until resize2fs is run; for ext4, resize2fs can be done online while the filesystem is mounted. In real-world scenarios, forgetting the resize step is a common cause of 'no space left' errors despite free space in the volume group, as the filesystem does not automatically detect the LV extension.
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: pvcreate /dev/sdc1; vgextend vg_web /dev/sdc1; lvextend -L +300G /dev/vg_web/lv_web; resize2fs /dev/vg_web/lv_web — Option D is correct because it follows the proper sequence: create a physical volume on the partition /dev/sdc1, extend the volume group vg_web with it, then extend the logical volume lv_web by 300GB, and finally resize the filesystem with resize2fs to utilize the new space. Since the logical volume is mounted and contains data, the filesystem must be resized after extending the LV to avoid data loss. The --resizefs flag in option C would also work, but the question asks for the correct sequence without that flag, and option D explicitly includes the separate resize2fs step.
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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