Chapter 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

Field

File

Record

A __________ is responsible for starting I/O operations on a device and processing the completion of an I/O request.

Basic I/O supervisor

Basic file system

Device driver

logical I/O

A _________ is a collection of related fields that can be treated as a unit by some application program.

file

Field

Record

Database

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

A __________ is a collection of similar records.

file

Database

Record

Field

The __________ level is the primary interface with the environment outside of the computer system.

logical I/O

Basic I/O supervisor

Physical I/O

Access method

_________ are used mostly in applications where timeliness of information is critical and where data are rarely processed exhaustively.

Indexed files

Indexed sequential files

Sequential files

Hashed files

A _________ is a collection of related data.

record

File

Database

Field

The _________ is concerned with scheduling disk and tape accesses to optimize performance.

Device driver

basic I/O supervisor

Access method

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

Pathname

Pile

Portion

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

Inode object

File object

Superblock object

Chapter 4

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