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POP > Chap 12 > Flashcards

Chap 12 Flashcards

1
Q

All types of UNIX files are administered by the OS by means of inodes.

A

True

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2
Q

A preallocation policy requires that the maximum size of a file be declared at the time of the file creation request.

A

True

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3
Q

File systems do not maintain the attributes associated with the files.

A

False

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4
Q

A field is characterized by its length and data type.

A

True

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5
Q

The cluster is the fundamental unit of allocation in NTFS.

A

True

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6
Q

Records may only be of fixed length.

A

False

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7
Q

The superuser is exempt from the usual file access control constraints and has system-wide access

A

True

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8
Q

Typically, the only way that a user or application may access files is through the file management system.

A

True

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9
Q

Device drivers are not part of the operating system.

A

False

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10
Q

The least-complicated form of file organization is the indexed file.

A

False

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11
Q

The sequential file organization is the only one that is easily stored on tape as well as disk.

A

True

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12
Q

A partial index contains one entry for every record in the main file.

A

False

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13
Q

A file directory contains information about the files, including attributes, location, and ownership.

A

True

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14
Q

Indexed allocation supports both sequential and direct access to the file and thus is the most popular form of file allocation.

A

True

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15
Q

A file allocation table (FAT) is used to keep track of the portions assigned to a file.

A

True

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16
Q

A _________ is the basic element of data.

A

field

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17
Q

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

A

device driver

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18
Q

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

A

record

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19
Q

An objective of the __________ is to provide a standardized set of I/O interface routines to user processes.

A

file management system

20
Q

A __________ is a collection of similar records.

A

file

21
Q

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

A

physical I/O

22
Q

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

A

Indexed files

23
Q

A _________ is a collection of related data.

A

database

24
Q

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

A

basic I/O supervisor

25
Q

The term _________ refers to the logical structuring of the records as determined by the way in which they are accessed.

A

file organization

26
Q

The most common form of file structure is __________.

A

the sequential file

27
Q

The _________ file exploits the capability found on disks to access directly any block of a known address.

A

direct

28
Q

A _________ is a contiguous set of allocated blocks.

A

portion

29
Q

The _________ contains the core parts of the operating system, including system binaries, system libraries, and configuration files.

A

system directory

30
Q

__________ represents an open file associated with a process.

A

File object

31
Q

A UNIX file system resides on a single logical disk or disk partition and is laid out with the following elements: superblock, inode table, data blocks, and __________.

A

boot block

32
Q

The __________ level provides a standard interface between applications and the file systems and devices that hold the data.

A

access method

33
Q

In the __________ form of file structure, all records are of the same length, consisting of the same number of fixed-length fields in a particular order.

A

sequential file

34
Q

The essential aspects of a __________ are that the relationships that exist among elements of data are explicit and designed for use by a number of different applications

A

database

35
Q

__________ provides a general-purpose record I/O capability and maintains basic data about files.

A

Logical I/O

36
Q

The physical organization of the file on secondary storage depends on the blocking strategy and the __________ strategy.

A

file allocation

37
Q

An objective of the __________ is to meet the data management needs and requirements of the user, which include storage of data and the ability to perform related operations.

A

file management system

38
Q

The __________ is responsible for all file I/O initiation and termination.

A

basic I/O supervisor

39
Q

An _________ is a control structure that contains the key information needed by the operating system for a particular file.

A

inode (index node)

40
Q

Because there is no structure to the _________ form of file organization, record access is by exhaustive search.

A

pile

41
Q

__________ are often used where very rapid access is required, where fixed-length records are used, and where records are always accessed one at a time.

A

Direct files (or hashed files)

42
Q

The ________ is a balanced tree structure with all branches of equal length and has become the standard method of organizing indexes for databases.

A

B-tree

43
Q

Linux makes use of a __________, which presents a single, uniform file system interface to user processes.

A

Virtual file system

44
Q

Three methods of file allocation commonly used are: chained, indexed, and _________.

A

contiguous

45
Q

A _________ is a collection of addressable sectors in secondary memory that an OS or application can use for data storage.

A

volume

POP (11 decks)

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