File management

Question 1

Also called the File Management System and is the software responsible for creating, deleting, modifying, controlling access to files.

Answer 1

File manager

Question 2

Provides support for libraries of programs to online users, for spooling operation, and for interactive computing.

Answer 2

File manager

Question 3

• The building blocks of any operation system
• Permanent storage of information & data

Answer 3

Files

Question 4

__ is not interested in what information is stored in file
__ maps files with physical devices.

Answer 4

OS

Question 5

___ represent program and data.

Answer 5

File

Question 6

The output of program is called ____.

Answer 6

executable file

Question 7

______ mechanism refers to the manner in which the records of a file may be accessed

Answer 7

File access

Question 8

There are several ways to access files (3)

Answer 8

• Sequential File Access
• Direct File Access
• Indexed File Access

Question 9

Is a method of accessing data
sequentially/one record at a time
by starting from the beginning of the file to its end.

Answer 9

Sequential file access

Question 10

This access method is the most
primitive and straightforward
method of accessing files.

Answer 10

Sequential file access

Question 11

Direct file access is also known as ____

Answer 11

Random file access

Question 12

Also known as Random file access

Answer 12

Direct file access

Question 13

Allows users to access data directly from any location within the file without the need to read/write all the records that come before it.

Answer 13

Direct file access

Question 14

Is a method that incorporates the benefits of both sequential and direct file access.

Answer 14

Indexed file access

Question 15

Creating an index file that maps logical keys or data elements to their corresponding physical addresses within the file.

Answer 15

Indexed file access

Question 16

refers to the ability of the operating system to distinguish different types of file such as text files, source files, and binary files etc.

Answer 16

File types

Question 17

Operating system like MS-DOS and UNIX have the following types of files:

Answer 17

• Ordinary files
• Directory files
• Special files

Question 18

• These are the files that contains user information.
• These may have text, databases or executable program.
• The user can apply various operations on such files like
- add, modify, delete or even remove the entire file.

Answer 18

Ordinary files

Question 19

• Contains list of file and other related information to those files.
• Also known as “folders” in other operating systems.
• Folders that holds and organize multiple files.

Answer 19

Directory files

Question 20

• These files are also known as device files.
• Represents physical devices like - disks, terminals, printers, networks, tape drive etc.

Answer 20

Special files

Question 21

These files are of two types of special files

Answer 21

• Character special files
• Block special files

Question 22

Data is handled character by character as in case of terminals or printers.

Answer 22

Character special files

Question 23

Data is handled in blocks as in the case of disks and tapes.

Answer 23

Block special files

Question 24

File operations (9)

Answer 24

• Create
• Delete
• Open
• Close
• Read
• Write
• Append
• Seek
• Rename

Question 25

File ______ operation is performed just to read the data that are stored in the required file.

Answer 25

read

Question 26

The file ____ operation is used to write the data to the file, again, generally at the current position.

Answer 26

write

Question 27

The file ____ operation is same as the file write operation except that the file append operation only add the data at the end of the file.

Answer 27

append

Question 28

For random access files, a method is needed just to specify from where to take the data. Therefore, the file ____ operation performs this task.

Answer 28

seek

Question 29

The file ____ operation is used to change the name of the existing file.

Answer 29

rename

Question 30

is a list of files that stores all the related information about the file it hold with the contents

Answer 30

Directory

Question 31

______ is a list of files

Answer 31

Directory

Question 32

Types of directories (3)

Answer 32

• Single-level directory structure • Two-level directory structure • Tree-structured directory structure

Question 33

in a ______ directory system, all the files are placed in one directory

Answer 33

single-level

Question 34

in the ____ directory system, the system maintains a master block that has one entry for each user.

Answer 34

two-level

Question 35

in the _____ directory, the directory themselves are files. This files to the possibility of having sub-directories that can contain files and sub-subdirectories

Answer 35

tree-structured

Question 36

**File Management System Structure** Layered file system (6)

Answer 36

• Application program layer • Logical file system layer • File organization module layer • Basic file system layer • I/O control interface layer • Physical hardware device layer

Question 37

layer where user creates application program

Answer 37

Application program layer

Question 38

The meta data information is managed at this layer

Answer 38

Logical file system layer

Question 39

Layer that maintains information about file

Answer 39

File Organization Module Layer

Question 40

Layer that: - generates command for device driver - also manage buffer memory and cache

Answer 40

Basic file system layer

Question 41

- it consists of device driver & interrupt handler - transfer data: between main memory to disk system.

Answer 41

I/O control interface layer

Question 42

- it consists of device driver & interrupt handler - transfer data: between main memory to disk system.

Answer 42

I/O control interface layer

Question 43

contain actual hardware device

Answer 43

Physical hardware device layer

Question 44

A reduction in the amount of bits required to represent data is known as ____.

Answer 44

data compression

Question 45

______ can save storage capacity, speed up file transfer and decrease costs for storage hardware and network bandwidth.

Answer 45

Compressing data

Question 46

When information is sent or received via the internet, larger files -- either singly or with others as part of an archive file -- may be transmitted in a __, __ or other compressed format.

Answer 46

ZIP, GZIP