Question 340 of 522

Devices, Filesystems and FHS →hardMultiple ChoiceObjective-mapped

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.

Exhibit

Exhibit: Output of `df -h`
Filesystem                              Size  Used Avail Use% Mounted on
/dev/mapper/vg_root-lv_root              20G   18G  1.1G  95% /
/dev/sda1                               487M  112M  348M  25% /boot
tmpfs                                   1.9G     0  1.9G   0% /dev/shm
/dev/mapper/vg_data-lv_data              50G   30G   18G  63% /data

Refer to the exhibit. The root filesystem is nearly full. The administrator needs to increase its size. Which steps should be performed?

Question 1hardmultiple choice

Full question →

Exhibit

Exhibit: Output of `df -h`
Filesystem                              Size  Used Avail Use% Mounted on
/dev/mapper/vg_root-lv_root              20G   18G  1.1G  95% /
/dev/sda1                               487M  112M  348M  25% /boot
tmpfs                                   1.9G     0  1.9G   0% /dev/shm
/dev/mapper/vg_data-lv_data              50G   30G   18G  63% /data

A
Use parted to resize the root partition and then mount it
Why wrong: Incorrect: Root is on LVM, not a raw partition. parted cannot resize LVM LVs.
B
Use fdisk to increase the size of /dev/sda1 and then run resize2fs
Why wrong: Incorrect: /dev/sda1 is /boot, not root. Also resizing a partition requires unmounting and may be complex.
C
Use lvextend to extend the logical volume and then resize2fs to resize the filesystem
Correct: LVM allows online resizing; lvextend extends LV, then resize2fs grows the filesystem.
D
Create a new filesystem on /dev/sda2 and mount it to /
Why wrong: Incorrect: sda2 is not present; also this would overwrite existing data.

Full breakdown with real-world context →

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

Use lvextend to extend the logical volume and then resize2fs to resize the filesystem

Option C is correct because the root filesystem is on an LVM logical volume, as indicated by the exhibit (e.g., /dev/mapper/rootvg-rootlv). To increase its size, you must first extend the logical volume using lvextend, then resize the filesystem with resize2fs. This two-step process ensures the underlying block device and the filesystem are both enlarged to utilize the newly available space.

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.

✗
Use parted to resize the root partition and then mount it
Why it's wrong here
Incorrect: Root is on LVM, not a raw partition. parted cannot resize LVM LVs.
✗
Use fdisk to increase the size of /dev/sda1 and then run resize2fs
Why it's wrong here
Incorrect: /dev/sda1 is /boot, not root. Also resizing a partition requires unmounting and may be complex.
✓
Use lvextend to extend the logical volume and then resize2fs to resize the filesystem
Why this is correct
Correct: LVM allows online resizing; lvextend extends LV, then resize2fs grows the filesystem.
Related concept
Read the scenario before looking for a memorised answer.
✗
Create a new filesystem on /dev/sda2 and mount it to /
Why it's wrong here
Incorrect: sda2 is not present; also this would overwrite existing data.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates assume the root filesystem is on a traditional partition and attempt to resize it with fdisk or parted, failing to recognize that LVM requires a different workflow with lvextend and resize2fs.

Detailed technical explanation

How to think about this question

LVM separates the physical storage (PVs) from logical storage (LVs), allowing resizing without repartitioning. The lvextend command extends the LV by allocating free extents from the volume group, and resize2fs then expands the filesystem to fill the LV. In a real-world scenario, if the volume group has no free extents, you must first add a new physical volume (e.g., a new disk) and extend the VG before extending the LV.

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.

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FAQ

Questions learners often ask

What does this LPIC-1 question test?

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: Use lvextend to extend the logical volume and then resize2fs to resize the filesystem — Option C is correct because the root filesystem is on an LVM logical volume, as indicated by the exhibit (e.g., /dev/mapper/rootvg-rootlv). To increase its size, you must first extend the logical volume using lvextend, then resize the filesystem with resize2fs. This two-step process ensures the underlying block device and the filesystem are both enlarged to utilize the newly available space.

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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Last reviewed: Jun 25, 2026

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