Q.
Define system software.
Ans.: System
software: System software is computer software designed to operate and
control the computer hardware and to provide a platform for running application
software. Device drivers such as computer BIOS and device firmware provide
basic functionality to operate and control the hardware connected to or built
into the computer.
Q.
Define Operating system.
Ans.: Operating
System: An operating system (OS) is
a set of software that manages computer hardware resources and provides common
services for computer programs. The operating system is a vital component of
the system software in a computer system. Application programs require an
operating system to function.
Q.
Define system calls?
Ans.: System Calls: A system call is a request
to the operating system to do something.
System
calls provide the interface between a running program and the operating system.
System calls are generally available as assembly language instructions. System
calls can be roughly grouped into three categories: process or job control,
device and file manipulation, and information maintenance.
Q.
Define system programs?
Ans.: System Programs: A system program is a
program that provides services to other programs. An OS is an example of a
system program. System programs solve common problems and provide a convenient
environment for program development and execution. System programs can be
divided into several categories. These are discussed below:
·
File manipulation
·
Status information
·
File modification
·
Programming language support
·
Program loading and execution
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