Page 18 - DCAP403_Operating System

Unit 1: Introduction to Operating System

An operating system is a program that acts as an interface between a user of a computer Notes
and the computer hardware.
The purpose of an operating system is to provide an environment in which a user may
execute programs.

The primary goal of an operating system is to make the computer convenient to use. And
the secondary goal is to use the hardware in an effi cient manner.

1.7 Keywords

An Operating System: It is the most important program in a computer system that runs all the
time, as long as the computer is operational and exits only when the computer is shut down.
Desktop System: Modern desktop operating systems usually feature a Graphical user interface
(GUI) which uses a pointing device such as a mouse or stylus for input in addition to the
keyboard.
Operating System: An operating system is a layer of software which takes care of technical
aspects of a computer’s operation.

1.8 Self Assessment

Choose the appropriate answers:
1. GUI stands for
(a) Graphical Used Interface

(b) Graphical User Interface
(c) Graphical User Interchange
(d) Good User Interface
2. CPU stands for
(a) Central Program Unit
(b) Central Programming Unit

(c) Central Processing Unit
(d) Centralization Processing Unit
3. FORTRAN stands for
(a) Formula Translation

(b) Formula Transformation
(c) Formula Transition
(d) Forming Translation
4. VLSI stands for
(a) Very Long Scale Integration

(b) Very Large Scale Interchange
(c) Very Large Scale Interface
(d) Very Large Scale Integration

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