1. What does df -h do?
Junior- A.create an XFS filesystem on a partition
- B.show filesystem disk usage and free space, human-readable
- C.initialize a disk as an LVM physical volume
- D.create a 5G logical volume named data
Linux · Storage & LVM interview questions
72 real Linux · Storage & LVM questions from the System Administration bank, as asked in Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd — free to start.
1. What does
Junior2. Which command will show filesystem disk usage and free space, human-readable?
Junior- A.umount /mnt
- B.xfs_growfs /mnt
- C.df -h
- D.vgextend vg0 /dev/sdc
3. Which statement is correct?
Junior- A.df -h — show filesystem disk usage and free space, human-readable
- B.df -h — initialize a disk as an LVM physical volume
- C.df -h — create an XFS filesystem on a partition
- D.df -h — grow a logical volume by 10G and resize its filesystem
4. What does du -sh dir do?
Junior- A.grow a logical volume by 10G and resize its filesystem
- B.show block-device UUIDs and filesystem types
- C.mount all filesystems listed in /etc/fstab
- D.show the total size of a directory
5. Which command will show the total size of a directory?
Junior- A.lsblk
- B.du -sh dir
- C.pvcreate /dev/sdb
- D.resize2fs /dev/vg/lv
6. Which statement is correct?
Junior- A.du -sh dir — list block devices as a tree
- B.du -sh dir — add a physical volume to an existing volume group
- C.du -sh dir — show the total size of a directory
- D.du -sh dir — show filesystem disk usage and free space, human-readable
7. What does lsblk do?
Junior- A.show the total size of a directory
- B.resize an ext4 filesystem to match its volume
- C.grow a logical volume by 10G and resize its filesystem
- D.list block devices as a tree
8. Which command will list block devices as a tree?
Junior- A.df -h
- B.lsblk
- C.mount -a
- D.pvcreate /dev/sdb
9. Which statement is correct?
Junior- A.lsblk — create an XFS filesystem on a partition
- B.lsblk — list block devices as a tree
- C.lsblk — show filesystem disk usage and free space, human-readable
- D.lsblk — add a physical volume to an existing volume group
10. What does blkid do?
Junior- A.attach a filesystem to a directory
- B.detach a mounted filesystem
- C.resize an ext4 filesystem to match its volume
- D.show block-device UUIDs and filesystem types
11. Which command will show block-device UUIDs and filesystem types?
Junior- A.umount /mnt
- B.resize2fs /dev/vg/lv
- C.blkid
- D.lvextend -r -L +10G /dev/vg/lv
12. Which statement is correct?
Junior- A.blkid — mount all filesystems listed in /etc/fstab
- B.blkid — resize an ext4 filesystem to match its volume
- C.blkid — show block-device UUIDs and filesystem types
- D.blkid — grow a mounted XFS filesystem online
13. What does lvextend -r -L +10G /dev/vg/lv do?
Mid- A.detach a mounted filesystem
- B.show filesystem disk usage and free space, human-readable
- C.add a physical volume to an existing volume group
- D.grow a logical volume by 10G and resize its filesystem
14. Which command will grow a logical volume by 10G and resize its filesystem?
Mid- A.vgextend vg0 /dev/sdc
- B.lvextend -r -L +10G /dev/vg/lv
- C.mount /dev/sdb1 /mnt
- D.resize2fs /dev/vg/lv
15. Which statement is correct?
Mid- A.lvextend -r -L +10G /dev/vg/lv — add a physical volume to an existing volume group
- B.lvextend -r -L +10G /dev/vg/lv — grow a mounted XFS filesystem online
- C.lvextend -r -L +10G /dev/vg/lv — show block-device UUIDs and filesystem types
- D.lvextend -r -L +10G /dev/vg/lv — grow a logical volume by 10G and resize its filesystem
16. What does xfs_growfs /mnt do?
Mid- A.add a physical volume to an existing volume group
- B.grow a logical volume by 10G and resize its filesystem
- C.grow a mounted XFS filesystem online
- D.create an XFS filesystem on a partition
17. Which command will grow a mounted XFS filesystem online?
Mid- A.lvcreate -L 5G -n data vg0
- B.xfs_growfs /mnt
- C.mount /dev/sdb1 /mnt
- D.resize2fs /dev/vg/lv
18. Which statement is correct?
Mid- A.xfs_growfs /mnt — initialize a disk as an LVM physical volume
- B.xfs_growfs /mnt — grow a mounted XFS filesystem online
- C.xfs_growfs /mnt — grow a logical volume by 10G and resize its filesystem
- D.xfs_growfs /mnt — create an XFS filesystem on a partition
19. What does resize2fs /dev/vg/lv do?
Mid- A.mount all filesystems listed in /etc/fstab
- B.grow a logical volume by 10G and resize its filesystem
- C.show the total size of a directory
- D.resize an ext4 filesystem to match its volume
20. Which command will resize an ext4 filesystem to match its volume?
Mid- A.lsblk
- B.mkfs.xfs /dev/sdb1
- C.umount /mnt
- D.resize2fs /dev/vg/lv
21. Which statement is correct?
Mid- A.resize2fs /dev/vg/lv — grow a mounted XFS filesystem online
- B.resize2fs /dev/vg/lv — add a physical volume to an existing volume group
- C.resize2fs /dev/vg/lv — initialize a disk as an LVM physical volume
- D.resize2fs /dev/vg/lv — resize an ext4 filesystem to match its volume
22. What is /etc/fstab?
Junior- A.striping with distributed parity, tolerating one disk failure
- B.XFS can grow online but cannot be shrunk
- C.disk used as overflow when physical RAM is full
- D.the file defining filesystems to mount at boot
23. Which term means: "the file defining filesystems to mount at boot"?
Junior- A.LVM snapshot
- B./etc/fstab
- C.XFS shrink limitation
- D.RAID 10
24. Which statement is correct?
Junior- A./etc/fstab — the file defining filesystems to mount at boot
- B./etc/fstab — logging metadata changes so the FS can recover quickly after a crash
- C./etc/fstab — disk used as overflow when physical RAM is full
- D./etc/fstab — the layering of physical volumes into volume groups into logical volumes
25. What is LVM PV→VG→LV?
Mid- A.XFS can grow online but cannot be shrunk
- B.disk used as overflow when physical RAM is full
- C.a structure storing a file's metadata and block pointers
- D.the layering of physical volumes into volume groups into logical volumes
26. Which term means: "the layering of physical volumes into volume groups into logical volumes"?
Mid- A.RAID 5
- B.inode
- C.RAID 10
- D.LVM PV→VG→LV
27. Which statement is correct?
Mid- A.LVM PV→VG→LV — disk used as overflow when physical RAM is full
- B.LVM PV→VG→LV — logging metadata changes so the FS can recover quickly after a crash
- C.LVM PV→VG→LV — the layering of physical volumes into volume groups into logical volumes
- D.LVM PV→VG→LV — striping with distributed parity, tolerating one disk failure
28. What is XFS shrink limitation?
Senior- A.striping with distributed parity, tolerating one disk failure
- B.XFS can grow online but cannot be shrunk
- C.the file defining filesystems to mount at boot
- D.logging metadata changes so the FS can recover quickly after a crash
29. Which term means: "XFS can grow online but cannot be shrunk"?
Senior- A.filesystem journaling
- B.RAID 5
- C.XFS shrink limitation
- D.LVM snapshot
30. Which statement is correct?
Senior- A.XFS shrink limitation — the layering of physical volumes into volume groups into logical volumes
- B.XFS shrink limitation — allocating LV space on demand from a thin pool, allowing overcommit
- C.XFS shrink limitation — disk used as overflow when physical RAM is full
- D.XFS shrink limitation — XFS can grow online but cannot be shrunk
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