Unit – I
Operating system is a program which interact between the hardware and application program or we
say that o/s is a program which manage complete hardware. It is the most important part of the every
computer system. Normally a computer system can be divided into four components :-
(1) Hardware
(2) Operating System
(3) Application Pro.
(4) Users.
User2
Assembler
System & Application Pro.
Operating System
Computer
Text Editor
The Hardware Consisted CPU, memory and Input/Output devices provides the computing resources.
Application Program is a way ly which these resources are used to solve the problem of users. O/S
Manages the use of H/W among different application program for different users.
We also compare the O/S with government it doesn’t perform the useful function by itself. It Provide
and Environment within which other program can do useful work. O/S have two view points :-
(1) User View
(2) System View
User View :-
(1)O/S is designed for case of Use :- These Systems is designed for single user. It is used
because of resources maximization which is performed by user. In these system me consider
the performance not consider about the resource utilization. So we say that in these System
performance is the important factor.
(2) O/S is designed to maximize the resource utilization: - In these system user share resources
and may exchange information. In these system all available CPU time, memory and I/O are
used efficiently.
(3) O/S is designed to compute h/w individual usability & resource utilization.
System View :-
(1) O/S as a resource Allocate :- A System has many resources hardware and software which
may be required to solve a problem like CPU time, memory space file storage space, I/O device
and so on. O/S is work as a manager of these resources O/S decided that how to allocate these
resources to specific programs and users. So that it can operate the computer system efficiently.
(2) O/S as a Controller of a Program :- It manage the execution of user program to present errors
and improper use of computer.
the main goal of the computer system is to execute user programs and to solve the user problems easily.
For this goal computer hardware is contracted.
Operating System is one program running at all times on the computer with all computer programs.
System Goals :-
(1) User Convenience :- O/S is mainly designed to compute the problems easily.
(2) Efficiency :- The second important goal of o/s is to perform the efficient operation. This is
considered when large, shared and multi-user system is used. For the convenience the user
friendly or the GUI (Graphical User Interface) were added.
Operating system is a program which interact between the hardware and application program or we
say that o/s is a program which manage complete hardware. It is the most important part of the every
computer system. Normally a computer system can be divided into four components :-
(1) Hardware
(2) Operating System
(3) Application Pro.
(4) Users.
User2
Assembler
System & Application Pro.
Operating System
Computer
Text Editor
The Hardware Consisted CPU, memory and Input/Output devices provides the computing resources.
Application Program is a way ly which these resources are used to solve the problem of users. O/S
Manages the use of H/W among different application program for different users.
We also compare the O/S with government it doesn’t perform the useful function by itself. It Provide
and Environment within which other program can do useful work. O/S have two view points :-
(1) User View
(2) System View
User View :-
(1)O/S is designed for case of Use :- These Systems is designed for single user. It is used
because of resources maximization which is performed by user. In these system me consider
the performance not consider about the resource utilization. So we say that in these System
performance is the important factor.
(2) O/S is designed to maximize the resource utilization: - In these system user share resources
and may exchange information. In these system all available CPU time, memory and I/O are
used efficiently.
(3) O/S is designed to compute h/w individual usability & resource utilization.
System View :-
(1) O/S as a resource Allocate :- A System has many resources hardware and software which
may be required to solve a problem like CPU time, memory space file storage space, I/O device
and so on. O/S is work as a manager of these resources O/S decided that how to allocate these
resources to specific programs and users. So that it can operate the computer system efficiently.
(2) O/S as a Controller of a Program :- It manage the execution of user program to present errors
and improper use of computer.
the main goal of the computer system is to execute user programs and to solve the user problems easily.
For this goal computer hardware is contracted.
Operating System is one program running at all times on the computer with all computer programs.
System Goals :-
(1) User Convenience :- O/S is mainly designed to compute the problems easily.
(2) Efficiency :- The second important goal of o/s is to perform the efficient operation. This is
considered when large, shared and multi-user system is used. For the convenience the user
friendly or the GUI (Graphical User Interface) were added.
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