OS File Systems and Their Implementation

Asynchronous

Regular

Synchronous

Irregular

names of all contents of file

pointers to each page

pointers to the various blocks

all of the mentioned

internal fragmentation

external fragmentation

there is no sequential access

there is only sequential access

without having an account on the remote system

only if he accesses the system with a guest account

only if he has an account on the remote system

none of the mentioned

Owner

Group

Universe

All of the mentioned

adding an extent (another chunk of contiguous space)

adding an index table to the first contiguous block

adding pointers into the first contiguous block

none of the mentioned

each file must occupy a set of contiguous blocks on the disk

each file is a linked list of disk blocks

all the pointers to scattered blocks are placed together in one location

none of the mentioned

File identifier

File name

File type

None of the mentioned

protected

local

private

remote

size of the linear list in memory

linear search to find a file

it is not reliable

all of the mentioned