Linux+ Linux+ Filesystem and Storage Management 2

Question 1

Which command displays the UUID of all block devices on a Linux system?

Accepted Answer

blkid

Answer

lsblk -f

Answer

fdisk -l

Answer

df -h

Question 2

A system administrator needs to non-destructively check an unmounted ext4 filesystem for errors. Which command is correct?

Accepted Answer

fsck.ext4 -n /dev/sdb1

Answer

e2fsck -y /dev/sdb1

Answer

tune2fs -c /dev/sdb1

Answer

mkfs.ext4 -c /dev/sdb1

Question 3

What is the purpose of the /etc/fstab 'dump' field (fifth column)?

Accepted Answer

Controls whether dump utility backs up the filesystem

Answer

Sets mount priority order

Answer

Specifies the number of fsck passes

Answer

Defines mount timeout in seconds

Question 4

Which LVM command resizes a logical volume AND its underlying ext4 filesystem simultaneously?

Accepted Answer

lvresize -r -L +5G /dev/vg0/lv0

Answer

lvextend -L +5G /dev/vg0/lv0

Answer

resize2fs /dev/vg0/lv0

Answer

lvchange -L +5G /dev/vg0/lv0

Question 5

A tmpfs filesystem is mounted with 'size=512m'. What happens when processes try to write more than 512MB?

Accepted Answer

The write fails with ENOSPC

Answer

Data is silently dropped

Answer

Data spills to swap space

Answer

The size limit auto-expands

Question 6

Which command would show the inode usage statistics for all mounted filesystems?

Accepted Answer

df -i

Answer

df -h

Answer

du -i

Answer

stat -f /

Question 7

An NFS mount in /etc/fstab uses the 'soft' option. What behavior does this enable?

Accepted Answer

Returns an error after timeout instead of hanging indefinitely

Answer

Mounts the share read-only

Answer

Caches writes locally before sending to server

Answer

Compresses data over the network