OS File Systems and Their Implementation

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

can

cannot

is

none of the mentioned

provide information about all the systems

provide unified access to the information needed for remote computing

provide unique names to all systems in a network

all of the mentioned

file-system identifier & an inode number

an inode number & FAT

a FAT & an inode number

a file pointer & FAT

per-process table entry is not removed

system wide entry’s open count is decremented

all of the mentioned

none of the mentioned

synchronously

asynchronously

index-wise

none of the mentioned

r

w

x

all of the mentioned

tree structure

cyclic graph directory structure

two level directory structure

acyclic graph directory

UNIX

Windows

Macintosh

Solaris

improve

decrease

maintain

do not affect