Tm111 week 5 Questions with Verified Correct
Answers
/bin
command binaries (programs), e.g. /bin/ls and /bin/ping.
Sometimes /usr/bin may be used as an alternative location for some systems/applications.
principle role of a file system...?
is to organise the storage space such that files can be saved and retrieved quickly.
Basic storage unit of a file system is called a ...?
a block
a block is...?
the basic storage unit of a file system.
how are files stored in a block?
small files can be stored wholly in one block
large files may need many blocks, so file system needs to split file into smaller pieces and
keep record of how theyre ordered, which pieces are in which blocks etc.
2 main/common methods for improving reliability in fault tolerance are...?
Error checking and Journaling
what is error checking?
what are 2 common error checking methods?
,a small error code (derived from the data) is stored with every piece of data when saving.
when data is retrieved, a new error code will be created from the rerieved data, then
compared with the stored error code.
if these 2 error codes do not match, it indicates an error is in the retirved data
2 common error checking methods are Checksum and Cyclic Redundancy Check.
what is journaling?
a common method for protecting data from corruption.
it is the process of logging changes before commiting these changes to the main file storage.
if a computer crashes while saving a file to a storage area, then these files will be incomplete
and corrupted. on boot up the file system checks the log in journal and compares the state of
the storage - it they dont match then there is an error.
what are 8 common file systems?
ext (ext2, ext3, ext4)
JFS
ReiserFS
XFS
NTFS
FAT16 / FAT32
CDFS
btrfs
what is FAT16/FAT32 file system?
, older file allocation table file system.
used in 1990s for most hard disks, now common as a file system for removable storage (e.g.
USB drives)
what is CDFS file system?
compact disc file system (and variants) forming the ISO standards useds for all CDs/DVDs
and ISO images used for operating system distributons
most commonly used file system in Linux is?
ext series
what is the ext series?
ext = extended file system
A single root file system , commonly used by Linux.
what is a single root file system? give example of one.
there is only one root in the system, no matter how many storage devices.
it begins with the root directory on top, and is then divided into other directories which each
store a particular kind of file.
example of single root file system is ext series.
the root symbol is...?
/
in a Linux file system, what is at the top?
the root = /
Answers
/bin
command binaries (programs), e.g. /bin/ls and /bin/ping.
Sometimes /usr/bin may be used as an alternative location for some systems/applications.
principle role of a file system...?
is to organise the storage space such that files can be saved and retrieved quickly.
Basic storage unit of a file system is called a ...?
a block
a block is...?
the basic storage unit of a file system.
how are files stored in a block?
small files can be stored wholly in one block
large files may need many blocks, so file system needs to split file into smaller pieces and
keep record of how theyre ordered, which pieces are in which blocks etc.
2 main/common methods for improving reliability in fault tolerance are...?
Error checking and Journaling
what is error checking?
what are 2 common error checking methods?
,a small error code (derived from the data) is stored with every piece of data when saving.
when data is retrieved, a new error code will be created from the rerieved data, then
compared with the stored error code.
if these 2 error codes do not match, it indicates an error is in the retirved data
2 common error checking methods are Checksum and Cyclic Redundancy Check.
what is journaling?
a common method for protecting data from corruption.
it is the process of logging changes before commiting these changes to the main file storage.
if a computer crashes while saving a file to a storage area, then these files will be incomplete
and corrupted. on boot up the file system checks the log in journal and compares the state of
the storage - it they dont match then there is an error.
what are 8 common file systems?
ext (ext2, ext3, ext4)
JFS
ReiserFS
XFS
NTFS
FAT16 / FAT32
CDFS
btrfs
what is FAT16/FAT32 file system?
, older file allocation table file system.
used in 1990s for most hard disks, now common as a file system for removable storage (e.g.
USB drives)
what is CDFS file system?
compact disc file system (and variants) forming the ISO standards useds for all CDs/DVDs
and ISO images used for operating system distributons
most commonly used file system in Linux is?
ext series
what is the ext series?
ext = extended file system
A single root file system , commonly used by Linux.
what is a single root file system? give example of one.
there is only one root in the system, no matter how many storage devices.
it begins with the root directory on top, and is then divided into other directories which each
store a particular kind of file.
example of single root file system is ext series.
the root symbol is...?
/
in a Linux file system, what is at the top?
the root = /
