Module 5

Question 1

What is the most common cause for a disk failure?

• Bugs in the disk controller module
• Poor manufacturing process
• Improper shutdown
• Not running defrag tool

Answer 1

Improper shutdown

Question 2

Reorder the steps to install a new disk drive on a Linux workstation.

1. Install a device driver if not present
2. Mount the device
3. Create a partition
4. Install a filesystem
5. Attach a physical device
6. Create a mount point if it doesn’t exist

Answer 2

5, 1, 3, 6, 2, 4

Question 3

Which statement describes a device file? (Select three)

• mknod command will create it
• Does not have an associated data block
• Exists under /boot directory
• A file through which OS can read/write to the device through a device driver

Answer 3

mknod command will create it

Does not have an associated data block

A file through which OS can read/write to the device through a device driver

Question 4

You can mount/unmount a device even if a user process is using the mount point.

True

False

Answer 4

False

Question 5

Which statements are true regarding the output below? (Select two)

Answer 5

sda2 is a block device

sda2 uses a device file identified by the major number 8

Question 6

How do you find out which filesystem the root partition uses? (Select two)

• df -T
• ls -l /
• cat /etc/fstab
• fstype

Answer 6

df -T

cat /etc/fstab

Question 7

Which one is NOT a component of LVM?

• Physical Volume
• Group Volume
• Volume Group
• Logical Volume

Answer 7

Group Volume

Question 8

What will fsck do if it cannot repair the bad blocks? (Select two)

• Delete them
• Flag them
• Move them to “lost+Found” directory under the root directory
• Move them to “lost+Found” directory under the mount point

Answer 8

Flag them

Move them to “lost+Found” directory under the mount point

Question 9

Find the match.

• sdc1
• sda1
• sdc2
• sdb2

Answer 9

sdc1 1st primary partition on the 3rd SATA SSD:

sda1 1st primary partition on the 1st SATA SSD:

sdc2 2nd primary partition on the 3rd SATA SSD:

sdb2 2nd primary partition on the 2nd SATA SSD:

Question 10

Standard partition can be extended only if an unallocated partition exists after it in contiguous manner.

True

False

Answer 10

True

Question 11

Which command can be used to repair an XFS filesystem?

• fsck -t xfs /dev/sdb1
• e2fsck /dev/sdb1
• fsck.xfs /dev/sdb1
• xfs_repair /dev/sdb1

Answer 11

xfs_repair /dev/sdb1

Question 12

After a partition on a hard disk is formatted with a filesystem, all partitions on that hard disk drive must use the same filesystem.

True

False

Answer 12

False

Question 13

Which command mounts all existing filesystems in /etc/fstab?

• mount -f
• mount -a
• mount /etc/fstab
• mount /etc/mtab

Answer 13

mount -a

Question 14

Which command is used to display the amount of free space that exists on a filesystem?

• fsck
• quota
• du
• df

Answer 14

df

Question 15

The lvextend command can be used to add unused space within a volume group to an existing logical volume.

True

False

Answer 15

True

Question 16

A user mounts a device to a mount point directory and realizes afterward she needs files previously found within the mount point directory. What should this user do?

• Nothing; the files are lost and cannot ever be accessed.
• Nothing; the files could not have been there because you can only mount to
  empty directories.
• Unmount the device from the directory.
• Run the fsck command to recover the file.
• Look in the lost+found directory for the file.

Answer 16

Unmount the device from the directory.

Question 17

A user runs the fsck command with the -f option on an ext4 filesystem that is showing signs of corruption. How would that user locate any files the system was unable to repair?

• Look in the root of the filesystem.
• The system prompts the user for a target location when it comes across a file
  it cannot repair.
• Mount the filesystem and check the lost+found directory underneath the
  mount point.
• View the contents of the directory /lost+found.

Answer 17

Mount the filesystem and check the lost+found directory underneath the mount point.

Question 18

A device file _______________________. (Choose all that apply.)

• has no inode section
• has no data section
• displays a major and minor number in place of a file size
• has a fixed size of 300 kilobytes

Answer 18

has no data section

displays a major and minor number in place of a file size

Question 19

You want to see the filesystems that are in use on the system. What command could you use? (Choose all that apply.)

• cat /etc/fstab
• df -T
• cat /etc/mtab
• ls /sys/block

Answer 19

df -T

cat /etc/mtab

Question 20

Which of the following statements are true? (Choose all that apply.)

• Quotas can only limit user space.
• Quotas can only limit the number of files a user can own.
• Quotas can limit both user space and the number of files a user can own.
• Hard limits can never be exceeded.
• Hard limits allow a user to exceed them for a certain period of time.
• Soft limits can never be exceeded.
• Soft limits allow a user to exceed them for a certain period of time.
• Either a hard limit or a soft limit can be set, but not both concurrently.

Answer 20

Quotas can limit both user space and the number of files a user can own.

Hard limits can never be exceeded.

Soft limits allow a user to exceed them for a certain period of time.