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what is an acyclic grapha tree that has been corrupted by links to other branches but does not have any cyclic paths in
what is a file path namea list of the subdirectories directories and files we must traverse to reach a file from the root
how do we overcome the disadvantages of the two-level directorygive links from one user directory to another creating path names system files become
what disadvantages are there to this two-level directory without other provisions two users who require cooperating with each other are hampered in
what advantages are there to this two-level directoryusers are isolated from each other users have more freedom in choosing file
what is the mfd ufd how are they relatedmfd is master-file directory which points to the ufds ufd is user-file directory which points to each of
list disadvantages of using a single directory users have no privacy users must be careful in choosing file names to avoid names used by others users
list operations to be performed on directoriessearch for a file delete a file create a file list a directory rename a file and traverse the file
list two types of system directoriesa device directory- describing physical properties of filesb file directory - giving logical properties of the
explain what isam isindexed sequential access method the file is stored in sorted order isam has a master index file indicating in what part of
how can an index file be used to speed up the access in direct-access fileshave an index in memory the index gives the key and the disk location of
can a direct access file be read sequentially explainyes keep a counter cp initially set to 0 after reading record cp increment
how does user specify block to be fetched in direct access by specifying the relative block number relative to first block in file which is block
normal 0 false false false en-in x-none x-none microsoftinternetexplorer4
what is a sequential filea file that is read one record or block or parameter at a time in order based on a tape model of a
list sample file types based on use on the vax under vms source programs bas for cob pli pas mar data files dat text files txt command
what is a filea named collection of related data explained by the creator recorded on secondary
under what circumstances do page faults occur describe the actions taken by the operating system when a page fault occursa page fault happens
what is a path namea pathname is the path from the root by all subdirectories to a specified file in a two-level directory structure a user name and
define ufd and mfdin the two-level directory structure every user has her own user file directory ufd every ufd has a similar structure but lists
what are the most common schemes for defining the logical structure of a directory the most common schemes for explaining the logical structure of a
what are the operations that can be performed on a directorythe operations that can be performed on a directory are search for a file create a file
what is directorythe device directory or simply called as directory records information-such as name location size and type for all files on that
what are the different accessing methods of a filethe different types of accessing a file are sequential access information in the file is accessed
what is the information associated with an open filevarious pieces of information are associated with an open file which may be file pointer