UNIX Question and Answer – Disk Management
UNIX MCQ – Multiple Choice Questions for exam, interview, and Entrance Test
1. Which command is used to format a floppy disk in UNIX?
a) mkfs.floppy
b) fdformat
c) mkfs.ext4
d) mformat
Answer: b) fdformat
Explanation: The fdformat command is used to format a floppy disk in UNIX.
2. What does the “mkfs.ext2 -b” command do in UNIX?
a) Check file system integrity
b) Create a new ext2 file system
c) Mount an ext2 file system
d) Set the block size of an ext2 file system
Answer: d) Set the block size of an ext2 file system
Explanation: The mkfs.ext2 -b command is used to set the block size of an ext2 file system in UNIX.
3. Which option is used with the mkfs command to specify the file system label in UNIX?
a) -n
b) -L
c) -l
d) -N
Answer: b) -L
Explanation: The -L option with the mkfs command is used to specify the file system label in UNIX.
4. What is the purpose of the mkswap -U command in UNIX?
a) Check swap space usage
b) Create a swap partition
c) Mount a swap partition
d) Set the UUID of a swap partition
Answer: d) Set the UUID of a swap partition
Explanation: The mkswap -U command is used to set the UUID of a swap partition in UNIX.
5. Which command is used to display information about the physical volume of a disk in UNIX?
a) pvdisplay
b) vgdisplay
c) lvdisplay
d) fdisk -l
Answer: d) fdisk -l
Explanation: The fdisk -l command is used to display information about the physical volume of a disk in UNIX.
6. What does the “mkfs -t vfat” command do in UNIX?
a) Create a new FAT32 file system
b) Check and repair a FAT32 file system
c) Mount a FAT32 file system
d) Resize a FAT32 file system
Answer: a) Create a new FAT32 file system
Explanation: The “mkfs -t vfat” command is used to create a new FAT32 file system in UNIX.
7. Which option is used with the mount command to mount all file systems listed in /etc/fstab in UNIX?
a) -a
b) -f
c) -m
d) -o auto
Answer: a) -a
Explanation: The -a option with the mount command is used to mount all file systems listed in /etc/fstab in UNIX.
8. What is the purpose of the mkswap -L command in UNIX?
a) Check swap space usage
b) Create a swap partition
c) Mount a swap partition
d) Set the label of a swap partition
Answer: d) Set the label of a swap partition
Explanation: The mkswap -L command is used to set the label of a swap partition in UNIX.
9. Which command is used to change the UUID of a file system in UNIX?
a) uuidgen
b) blkid
c) tune2fs
d) e2label
Answer: c) tune2fs
Explanation: The tune2fs command is used to change the UUID of a file system in UNIX.
10. What does the “mkfs -t ntfs” command do in UNIX?
a) Create a new NTFS file system
b) Check and repair an NTFS file system
c) Mount an NTFS file system
d) Resize an NTFS file system
Answer: a) Create a new NTFS file system
Explanation: The “mkfs -t ntfs” command is used to create a new NTFS file system in UNIX.
11. Which option is used with the mkfs command to specify the number of reserved blocks for system use in UNIX?
a) -b
b) -r
c) -R
d) -m
Answer: d) -m
Explanation: The -m option with the mkfs command is used to specify the number of reserved blocks for system use in UNIX.
12. What is the purpose of the swapoff -a command in UNIX?
a) Enable swapping on all swap devices
b) Disable swapping on all swap devices
c) Display information about swap space usage
d) Check and repair swap space integrity
Answer: b) Disable swapping on all swap devices
Explanation: The swapoff -a command is used to disable swapping on all swap devices in UNIX.
13. Which command is used to display the UUID of a swap partition in UNIX?
a) uuidgen
b) blkid
c) swaplabel
d) mkswap
Answer: b) blkid
Explanation: The blkid command is used to display the UUID of a swap partition in UNIX.
14. What does the “mkfs -t ext2” command do in UNIX?
a) Create a new ext2 file system
b) Check and repair an ext2 file system
c) Mount an ext2 file system
d) Resize an ext2 file system
Answer: a) Create a new ext2 file system
Explanation: The “mkfs -t ext2” command is used to create a new ext2 file system in UNIX.
15. Which option is used with the mount command to mount a file system read-write, allowing only the owner to write to it in UNIX?
a) -r
b) -o rw
c) -o ro
d) -o rw,owner
Answer: d) -o rw,owner
Explanation: The -o rw,owner option with the mount command is used to mount a file system read-write, allowing only the owner to write to it in UNIX.
16. What is the purpose of the fsck -f command in UNIX?
a) Mount a file system
b) Unmount a file system
c) Check and repair file system integrity interactively
d) Force check and repair file system integrity
Answer: d) Force check and repair file system integrity
Explanation: The fsck -f command is used to force check and repair file system integrity in UNIX.
17. Which command is used to display information about the attributes of a file system in UNIX?
a) fsck
b) tune2fs
c) blkid
d) e2label
Answer: b) tune2fs
Explanation: The tune2fs command is used to display information about the attributes of a file system in UNIX.
18. What does the “mkswap -p” command do in UNIX?
a) Check swap space usage
b) Create a swap partition
c) Mount a swap partition
d) Unmount a swap partition
Answer: b) Create a swap partition
Explanation: The mkswap -p command is used to create a swap partition in UNIX.
19. Which option is used with the fsck command to repair file system errors interactively in UNIX?
a) -y
b) -r
c) -f
d) -p
Answer: b) -r
Explanation: The -r option with the fsck command is used to repair file system errors interactively in UNIX.
20. What is the purpose of the dumpe2fs -h command in UNIX?
a) Check file system integrity
b) Display superblock information
c) Mount a file system
d) Resize a file system
Answer: b) Display superblock information
Explanation: The dumpe2fs -h command is used to display superblock information in UNIX.
21. Which command is used to display detailed information about a specific file system in UNIX?
a) fsstat
b) tune2fs
c) blkid
d) dumpe2fs
Answer: d) dumpe2fs
Explanation: The dumpe2fs command is used to display detailed information about a specific file system in UNIX.
22. What does the “mkfs.ext3 -c” command do in UNIX?
a) Check file system integrity
b) Create a new ext3 file system
c) Mount an ext3 file system
d) Resize an ext3 file system
Answer: b) Create a new ext3 file system
Explanation: The mkfs.ext3 -c command is used to create a new ext3 file system in UNIX.
23. Which option is used with the mkfs command to specify the inode size for a new file system in UNIX?
a) -I
b) -i
c) -s
d) -S
Answer: b) -i
Explanation: The -i option with the mkfs command is used to specify the inode size for a new file system in UNIX.
24. What is the purpose of the tune2fs -L command in UNIX?
a) Check file system integrity
b) Set the label of a file system
c) Mount a file system
d) Resize a file system
Answer: b) Set the label of a file system
Explanation: The tune2fs -L command is used to set the label of a file system in UNIX.
25. Which command is used to display information about logical volumes in UNIX?
a) pvdisplay
b) vgdisplay
c) lvdisplay
d) fdisk -l
Answer: c) lvdisplay
Explanation: The lvdisplay command is used to display information about logical volumes in UNIX.
26. What does the “mkfs -t btrfs” command do in UNIX?
a) Create a new btrfs file system
b) Check and repair a btrfs file system
c) Mount a btrfs file system
d) Resize a btrfs file system
Answer: a) Create a new btrfs file system
Explanation: The “mkfs -t btrfs” command is used to create a new btrfs file system in UNIX.
27. Which option is used with the mount command to mount a file system read-write, allowing only a specific user to write to it in UNIX?
a) -o rw
b) -o rw,user
c) -o rw,owner
d) -o rw,uid
Answer: c) -o rw,owner
Explanation: The -o rw,owner option with the mount command is used to mount a file system read-write, allowing only the owner to write to it in UNIX.
28. What is the purpose of the swapoff command in UNIX?
a) Enable swapping on a device or file
b) Disable swapping on a device or file
c) Display information about swap space usage
d) Check and repair swap space integrity
Answer: b) Disable swapping on a device or file
Explanation: The swapoff command is used to disable swapping on a device or file in UNIX.
29. Which command is used to display information about a specific physical volume in UNIX?
a) pvdisplay
b) vgdisplay
c) lvdisplay
d) fdisk -l
Answer: a) pvdisplay
Explanation: The pvdisplay command is used to display information about a specific physical volume in UNIX.
30. What does the “mkswap -c” command do in UNIX?
a) Check swap space usage
b) Create a swap partition
c) Mount a swap partition
d) Unmount a swap partition
Answer: b) Create a swap partition
Explanation: The mkswap -c command is used to create a swap partition in UNIX.
31. Which option is used with the fsck command to check and repair file system errors automatically in UNIX?
a) -y
b) -r
c) -f
d) -p
Answer: c) -f
Explanation: The -f option with the fsck command is used to check and repair file system errors automatically in UNIX.
32. What is the purpose of the mkswap -U command in UNIX?
a) Check swap space usage
b) Create a swap partition
c) Mount a swap partition
d) Set the UUID of a swap partition
Answer: d) Set the UUID of a swap partition
Explanation: The mkswap -U command is used to set the UUID of a swap partition in UNIX.
33. Which command is used to display information about a specific volume group in UNIX?
a) pvdisplay
b) vgdisplay
c) lvdisplay
d) fdisk -l
Answer: b) vgdisplay
Explanation: The vgdisplay command is used to display information about a specific volume group in UNIX.
34. What does the “mkfs.ext4 -r” command do in UNIX?
a) Check file system integrity
b) Create a new ext4 file system
c) Mount an ext4 file system
d) Resize an ext4 file system
Answer: b) Create a new ext4 file system
Explanation: The mkfs.ext4 -r command is used to create a new ext4 file system in UNIX.
35. Which option is used with the mkfs command to specify the block size for a new file system in UNIX?
a) -B
b) -b
c) -S
d) -s
Answer: b) -b
Explanation: The -b option with the mkfs command is used to specify the block size for a new file system in UNIX.
36. What is the purpose of the swapoff -a command in UNIX?
a) Enable swapping on all swap devices
b) Disable swapping on all swap devices
c) Display information about swap space usage
d) Check and repair swap space integrity
Answer: b) Disable swapping on all swap devices
Explanation: The swapoff -a command is used to disable swapping on all swap devices in UNIX.
37. Which command is used to display information about physical volumes in a volume group in UNIX?
a) pvdisplay
b) vgdisplay
c) lvdisplay
d) fdisk -l
Answer: a) pvdisplay
Explanation: The pvdisplay command is used to display information about physical volumes in a volume group in UNIX.
38. What does the “mkfs.ext3 -N” command do in UNIX?
a) Check file system integrity
b) Create a new ext3 file system without journaling
c) Mount an ext3 file system
d) Resize an ext3 file system
Answer: b) Create a new ext3 file system without journaling
Explanation: The mkfs.ext3 -N command is used to create a new ext3 file system without journaling in UNIX.
39. Which option is used with the fsck command to repair file system errors without user intervention in UNIX?
a) -y
b) -r
c) -f
d) -p
Answer: a) -y
Explanation: The -y option with the fsck command is used to repair file system errors without user intervention in UNIX.
40. What is the purpose of the fsck -p command in UNIX?
a) Mount a file system
b) Unmount a file system
c) Check and repair file system integrity automatically
d) Resize a file system
Answer: c) Check and repair file system integrity automatically
Explanation: The fsck -p command is used to check and repair file system integrity automatically in UNIX.
41. Which command is used to display information about logical volumes in a volume group in UNIX?
a) pvdisplay
b) vgdisplay
c) lvdisplay
d) fdisk -l
Answer: c) lvdisplay
Explanation: The lvdisplay command is used to display information about logical volumes in a volume group in UNIX.
42. What does the “mkfs.ext2 -N” command do in UNIX?
a) Check file system integrity
b) Create a new ext2 file system without journaling
c) Mount an ext2 file system
d) Resize an ext2 file system
Answer: b) Create a new ext2 file system without journaling
Explanation: The mkfs.ext2 -N command is used to create a new ext2 file system without journaling in UNIX.
43. Which option is used with the fsck command to force check and repair file system errors in UNIX?
a) -y
b) -r
c) -f
d) -p
Answer: c) -f
Explanation: The -f option with the fsck command is used to force check and repair file system errors in UNIX.
44. What does the “mkswap -p” command do in UNIX?
a) Check swap space usage
b) Create a swap partition
c) Mount a swap partition
d) Unmount a swap partition
Answer: b) Create a swap partition
Explanation: The mkswap -p command is used to create a swap partition in UNIX.
45. Which option is used with the fsck command to repair file system errors interactively in UNIX?
a) -y
b) -r
c) -f
d) -p
Answer: b) -r
Explanation: The -r option with the fsck command is used to repair file system errors interactively in UNIX.
46. Which command is used to resize an ext4 file system in UNIX?
a) resize2fs
b) mkfs.ext4
c) fsck.ext4
d) tune2fs
Answer: a) resize2fs
Explanation: The resize2fs command is used to resize an ext4 file system in UNIX.
47. What does the “mkfs -t reiserfs” command do in UNIX?
a) Create a new ReiserFS file system
b) Check and repair a ReiserFS file system
c) Mount a ReiserFS file system
d) Resize a ReiserFS file system
Answer: a) Create a new ReiserFS file system
Explanation: The “mkfs -t reiserfs” command is used to create a new ReiserFS file system in UNIX.
48. Which option is used with the mkfs command to specify the journaling mode for a new file system in UNIX?
a) -J
b) -j
c) -T
d) -t
Answer: a) -J
Explanation: The -J option with the mkfs command is used to specify the journaling mode for a new file system in UNIX.
49. What is the purpose of the tune2fs -c command in UNIX?
a) Change the maximum mount count for a file system
b) Change the block size for a file system
c) Change the inode size for a file system
d) Change the label of a file system
Answer: a) Change the maximum mount count for a file system
Explanation: The tune2fs -c command is used to change the maximum mount count for a file system in UNIX.
50. Which command is used to display information about disk partitions in a volume group in UNIX?
a) pvdisplay
b) vgdisplay
c) lvdisplay
d) fdisk -l
Answer: c) lvdisplay
Explanation: The lvdisplay command is used to display information about disk partitions in a volume group in UNIX.
