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Linux · Storage & LVM interview questions

72 Linux · Storage & LVM questions from the System Administration bank, written for Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd.

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1. What does df -h do?

Junior
  1. A.create an XFS filesystem on a partition
  2. B.show filesystem disk usage and free space, human-readable
  3. C.initialize a disk as an LVM physical volume
  4. D.create a 5G logical volume named data

Answer + AI explanation with Pro

2. Which command will show filesystem disk usage and free space, human-readable?

Junior
  1. A.umount /mnt
  2. B.xfs_growfs /mnt
  3. C.df -h
  4. D.vgextend vg0 /dev/sdc

Answer + AI explanation with Pro

3. Which statement is correct?

Junior
  1. A.df -h — show filesystem disk usage and free space, human-readable
  2. B.df -h — initialize a disk as an LVM physical volume
  3. C.df -h — create an XFS filesystem on a partition
  4. D.df -h — grow a logical volume by 10G and resize its filesystem

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4. What does du -sh dir do?

Junior
  1. A.grow a logical volume by 10G and resize its filesystem
  2. B.show block-device UUIDs and filesystem types
  3. C.mount all filesystems listed in /etc/fstab
  4. D.show the total size of a directory

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5. Which command will show the total size of a directory?

Junior
  1. A.lsblk
  2. B.du -sh dir
  3. C.pvcreate /dev/sdb
  4. D.resize2fs /dev/vg/lv

Answer + AI explanation with Pro

6. Which statement is correct?

Junior
  1. A.du -sh dir — list block devices as a tree
  2. B.du -sh dir — add a physical volume to an existing volume group
  3. C.du -sh dir — show the total size of a directory
  4. D.du -sh dir — show filesystem disk usage and free space, human-readable

Answer + AI explanation with Pro

7. What does lsblk do?

Junior
  1. A.show the total size of a directory
  2. B.resize an ext4 filesystem to match its volume
  3. C.grow a logical volume by 10G and resize its filesystem
  4. D.list block devices as a tree

Answer + AI explanation with Pro

8. Which command will list block devices as a tree?

Junior
  1. A.df -h
  2. B.lsblk
  3. C.mount -a
  4. D.pvcreate /dev/sdb

Answer + AI explanation with Pro

9. Which statement is correct?

Junior
  1. A.lsblk — create an XFS filesystem on a partition
  2. B.lsblk — list block devices as a tree
  3. C.lsblk — show filesystem disk usage and free space, human-readable
  4. D.lsblk — add a physical volume to an existing volume group

Answer + AI explanation with Pro

10. What does blkid do?

Junior
  1. A.attach a filesystem to a directory
  2. B.detach a mounted filesystem
  3. C.resize an ext4 filesystem to match its volume
  4. D.show block-device UUIDs and filesystem types

Answer + AI explanation with Pro

11. Which command will show block-device UUIDs and filesystem types?

Junior
  1. A.umount /mnt
  2. B.resize2fs /dev/vg/lv
  3. C.blkid
  4. D.lvextend -r -L +10G /dev/vg/lv

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12. Which statement is correct?

Junior
  1. A.blkid — mount all filesystems listed in /etc/fstab
  2. B.blkid — resize an ext4 filesystem to match its volume
  3. C.blkid — show block-device UUIDs and filesystem types
  4. D.blkid — grow a mounted XFS filesystem online

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13. What does lvextend -r -L +10G /dev/vg/lv do?

Mid
  1. A.detach a mounted filesystem
  2. B.show filesystem disk usage and free space, human-readable
  3. C.add a physical volume to an existing volume group
  4. D.grow a logical volume by 10G and resize its filesystem

Answer + AI explanation with Pro

14. Which command will grow a logical volume by 10G and resize its filesystem?

Mid
  1. A.vgextend vg0 /dev/sdc
  2. B.lvextend -r -L +10G /dev/vg/lv
  3. C.mount /dev/sdb1 /mnt
  4. D.resize2fs /dev/vg/lv

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15. Which statement is correct?

Mid
  1. A.lvextend -r -L +10G /dev/vg/lv — add a physical volume to an existing volume group
  2. B.lvextend -r -L +10G /dev/vg/lv — grow a mounted XFS filesystem online
  3. C.lvextend -r -L +10G /dev/vg/lv — show block-device UUIDs and filesystem types
  4. D.lvextend -r -L +10G /dev/vg/lv — grow a logical volume by 10G and resize its filesystem

Answer + AI explanation with Pro

16. What does xfs_growfs /mnt do?

Mid
  1. A.add a physical volume to an existing volume group
  2. B.grow a logical volume by 10G and resize its filesystem
  3. C.grow a mounted XFS filesystem online
  4. D.create an XFS filesystem on a partition

Answer + AI explanation with Pro

17. Which command will grow a mounted XFS filesystem online?

Mid
  1. A.lvcreate -L 5G -n data vg0
  2. B.xfs_growfs /mnt
  3. C.mount /dev/sdb1 /mnt
  4. D.resize2fs /dev/vg/lv

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18. Which statement is correct?

Mid
  1. A.xfs_growfs /mnt — initialize a disk as an LVM physical volume
  2. B.xfs_growfs /mnt — grow a mounted XFS filesystem online
  3. C.xfs_growfs /mnt — grow a logical volume by 10G and resize its filesystem
  4. D.xfs_growfs /mnt — create an XFS filesystem on a partition

Answer + AI explanation with Pro

19. What does resize2fs /dev/vg/lv do?

Mid
  1. A.mount all filesystems listed in /etc/fstab
  2. B.grow a logical volume by 10G and resize its filesystem
  3. C.show the total size of a directory
  4. D.resize an ext4 filesystem to match its volume

Answer + AI explanation with Pro

20. Which command will resize an ext4 filesystem to match its volume?

Mid
  1. A.lsblk
  2. B.mkfs.xfs /dev/sdb1
  3. C.umount /mnt
  4. D.resize2fs /dev/vg/lv

Answer + AI explanation with Pro

21. Which statement is correct?

Mid
  1. A.resize2fs /dev/vg/lv — grow a mounted XFS filesystem online
  2. B.resize2fs /dev/vg/lv — add a physical volume to an existing volume group
  3. C.resize2fs /dev/vg/lv — initialize a disk as an LVM physical volume
  4. D.resize2fs /dev/vg/lv — resize an ext4 filesystem to match its volume

Answer + AI explanation with Pro

22. What is /etc/fstab?

Junior
  1. A.striping with distributed parity, tolerating one disk failure
  2. B.XFS can grow online but cannot be shrunk
  3. C.disk used as overflow when physical RAM is full
  4. D.the file defining filesystems to mount at boot

Answer + AI explanation with Pro

23. Which term means: "the file defining filesystems to mount at boot"?

Junior
  1. A.LVM snapshot
  2. B./etc/fstab
  3. C.XFS shrink limitation
  4. D.RAID 10

Answer + AI explanation with Pro

24. Which statement is correct?

Junior
  1. A./etc/fstab — the file defining filesystems to mount at boot
  2. B./etc/fstab — logging metadata changes so the FS can recover quickly after a crash
  3. C./etc/fstab — disk used as overflow when physical RAM is full
  4. D./etc/fstab — the layering of physical volumes into volume groups into logical volumes

Answer + AI explanation with Pro

25. What is LVM PV→VG→LV?

Mid
  1. A.XFS can grow online but cannot be shrunk
  2. B.disk used as overflow when physical RAM is full
  3. C.a structure storing a file's metadata and block pointers
  4. D.the layering of physical volumes into volume groups into logical volumes

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26. Which term means: "the layering of physical volumes into volume groups into logical volumes"?

Mid
  1. A.RAID 5
  2. B.inode
  3. C.RAID 10
  4. D.LVM PV→VG→LV

Answer + AI explanation with Pro

27. Which statement is correct?

Mid
  1. A.LVM PV→VG→LV — disk used as overflow when physical RAM is full
  2. B.LVM PV→VG→LV — logging metadata changes so the FS can recover quickly after a crash
  3. C.LVM PV→VG→LV — the layering of physical volumes into volume groups into logical volumes
  4. D.LVM PV→VG→LV — striping with distributed parity, tolerating one disk failure

Answer + AI explanation with Pro

28. What is XFS shrink limitation?

Senior
  1. A.striping with distributed parity, tolerating one disk failure
  2. B.XFS can grow online but cannot be shrunk
  3. C.the file defining filesystems to mount at boot
  4. D.logging metadata changes so the FS can recover quickly after a crash

Answer + AI explanation with Pro

29. Which term means: "XFS can grow online but cannot be shrunk"?

Senior
  1. A.filesystem journaling
  2. B.RAID 5
  3. C.XFS shrink limitation
  4. D.LVM snapshot

Answer + AI explanation with Pro

30. Which statement is correct?

Senior
  1. A.XFS shrink limitation — the layering of physical volumes into volume groups into logical volumes
  2. B.XFS shrink limitation — allocating LV space on demand from a thin pool, allowing overcommit
  3. C.XFS shrink limitation — disk used as overflow when physical RAM is full
  4. D.XFS shrink limitation — XFS can grow online but cannot be shrunk

Answer + AI explanation with Pro

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