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Sheet 4

All types of UNIX files are administered by the OS by means of inodes.
True
False
A preallocation policy requires that the maximum size of a file be declared at the time of the file creation request.
True
False
File systems do not maintain the attributes associated with the files.
True
False
A field is characterized by its length and data type.
True
False
The cluster is the fundamental unit of allocation in NTFS.
True
False
Records may only be of fixed length.
True
False
The superuser is exempt from the usual file access control constraints and has system wide access.
True
False
Typically, the only way that a user or application may access files is through the file management system.
True
False
Device drivers are not part of the operating system.
True
False
The least-complicated form of file organization is the indexed file.
True
False
The sequential file organization is the only one that is easily stored on tape as well as disk.
True
False
A partial index contains one entry for every record in the main file.
True
False
A file directory contains information about the files, including attributes, location, and ownership.
True
False
Indexed allocation supports both sequential and direct access to the file and thus is the most popular form of file allocation.
True
False
A file allocation table (FAT) is used to keep track of the portions assigned to a file.
True
False
A _________ is the basic element of data:
Database
File
Record
Field
A __________ is responsible for starting I/O operations on a device and processing the completion of an I/O request.
Device driver
Basic I/O supervisor
Basic file system
logical I/O
A _________ is a collection of related fields that can be treated as a unit by some application program.
Field
Database
Record
File
A __________ is a collection of similar records.
File
Record
Database
Field
A _________ is a collection of related data.
File
Record
Database
Field
An objective of the __________ is to provide a standardized set of I/O interface routines to user processes.
Working directory
File management system
indexed file allocation
File directory
The __________ level is the primary interface with the environment outside of the computer system.
Physical I/O
Logical I/O
Basic I/O supervisor
Access method
_________ are used mostly in applications where timeliness of information is critical and where data are rarely processed exhaustively.
Indexed files
Sequential files
Indexed sequential files
Hashed files
The _________ is concerned with scheduling disk and tape accesses to optimize performance.
Device driver
Access method
Basic I/O supervisor
Logical I/O
The term _________ refers to the logical structuring of the records as determined by the way in which they are accessed.
File organization
Access method
Working directory
Database
The most common form of file structure is __________ .
The indexed file
The sequential file
the pile
the indexed sequential file
The _________ file exploits the capability found on disks to access directly any block of a known address.
Direct
Sequential
Indexed sequential
Indexed
A _________ is a contiguous set of allocated blocks.
Key
Portion
Pile
Pathname
The _________ contains the core parts of the operating system, including system binaries, system libraries, and configuration files.
Data directory
System directory
Cache directory
Mnt/sdcard directory
__________ represents an open file associated with a process.
Dentry object
File object
Inode object
Superblock object
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