Creating a volume group from a PV | LinuC Level 1 101 Exam original practice question

1.05.1Basic

Create a new volume group named vgdata from initialized PV /dev/sdb1.

Which command is appropriate?

Hint 1: Focus on the requirement

Choose the virtual filesystem that exposes the running kernel's device model and attributes.

Hint 2: Key terms

Review the short hardware and kernel-interface definitions before comparing the choices.

sysfs: A virtual filesystem exposing kernel devices, buses, drivers, and attributes.
Device attribute: An identifier or state value exposed for a device object.
udev: A user-space system that applies rules to device events.

Detailed explanation

Incorrect/dev

Incorrect. pvcreate initializes PV metadata and does not create a VG.

Incorrect/proc

Correct. vgcreate vgdata /dev/sdb1 creates the volume group.

Incorrect/run

Incorrect. lvcreate creates an LV from a VG.

Correct/sys

Incorrect. vgs only displays volume-group information.

An example you can run in a temporary verification environment.

find /sys -maxdepth 1 -type d -printf '%f
' | sort | grep -E '^(block|bus|class|devices|module)$'

block、bus、class、devices、module等

Environment: Linux sysfs / 読み取り操作
Prefer read-only inspection or a disposable system when testing hardware commands.
Device visibility and module behavior depend on the host and virtualization environment.

Foundation review

sysfs is an object-model view; /dev is the access-node namespace.

Read a device attribute without modifying persistent storage.

Question IDKL-101-553

EnvironmentLinux sysfs / 読み取り操作

Last technical review2026-08-13

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