Computer software-2

Question 1

Utility Programs

Answer 1

– Utility programs (small programs) provide additional
capabilities to the computer system.
– They enable operating system to perform some
additional tasks, such as searching and printing the
files and scanning the viruses, etc.
– An operating system can execute most of the
programs without having the utility programs.
– Utility programs are added to an operating system to
perform many different tasks, that include:
* Search, print, system profiler, virus scanner, backup, data
recovery

Question 2

Device Drivers

Answer 2

– A computer system is connected with multiple
input and output (I/O) devices.
– To interact with the I/O devices, the computer
system requires special software called device
driver.
– A device driver is special software that enables a
hardware device, such as keyboard, monitor and
printer to perform an operation according to the
command given by the end user.

Question 3

Functions of device driver

Answer 3

• Whenever a
  program/application
  needs to use a
  connected hardware
  device, it issues a
  command to the
  operating system.
• The operating system
  calls the respective
  routine or process of
  the device driver, which
  instructs the device to
  perform the task.

Question 4

System Development Programs

Answer 4

These programs are used to develop programs in different
programming languages.

Question 5

The process of developing and executing a program involves the
following tasks:

Answer 5

– Debugging the program
– Linking the various variables and objects with the libraries files
– Translating the code from one language to another
– Running the machine code to perform the desired task

Question 6

To carry out these tasks, we need the following system
development tools:

Answer 6

– Language translators
– Linkers
– Debuggers
– Editors

Question 7

Language translator

Answer 7

– Language translator is used to convert the program
code written in one language to another language
(called object code).

Question 8

Linker

Answer 8

– Most of the high-level languages allow the developer
to develop a large program containing multiple
modules.
– Linker arranges the object codes of all the modules
that have been generated by the language translator
into a single program.

Question 9

Debuggers

Answer 9

Debugger is the software that is used to detect the errors and bugs present
in the programs

Question 10

Editors

Answer 10

– Editor is a special program that allows the user to work with text in the
computer system.
– The editor enables us to perform the various editing operations such as
copy, cut and paste while editing the text.

Question 11

Text editor:

Answer 11

• It is used to edit plain text.
• An operating system always includes a text editor for updating the configuration files.

Question 12

Digital audio editor:

Answer 12

• It is used to edit the information related to the audio components of a multimedia
  application.
• It is used in audio applications where editing the music and the sound signals is
  necessary.

Question 13

Application Software

Answer 13

These are application programs which perform
certain common information processing tasks
for the users.
Examples include:
– Word processor (Microsoft word)
– Spreadsheet (Microsoft Excel)
– Database Manager
– Desktop Publisher

– Web Browse

Question 14

Desktop Publisher

Answer 14

• It helps the users to design the desired page layout
  containing different components such as text, graphics
  and images.