Introduction to Operating Systems
What is Operating System:
An Operating System is a program or software that manages the computer
hardware and provides a simple interface to the hardware for user programs.
It is an intermediate program between the user and the computer hardware.
It provides services for the efficient execution of application software.
An Operating System is also viewed as a resource allocator because it allocates
different resources such as CPU time, Memory space, file, storage space, I/O
devices.
Operating Systems perform basic tasks such as receiving input from keyboard,
sending output to the display screen, controlling peripheral devices such as disk
drivers, printers.
The Operating System is also responsible for security and ensuring that
unauthorized users cannot access the computer system.
Fundamental Goals of the Operating System:
There are two main goals of Operating System:
To provide a user friendly and convenient environment.
Efficient and successful operation of the computer system.
Objectives of Operating System:
Following are the objectives of Operating System:
Hide details of computer hardware resources from the user.
Effective management and allocation of resources to the processes.
Acts as an intermediate program between user and computer hardware.
Makes computer system easier to use in an efficient manner.
, Provides effective and efficient environment for the user to execute
programs.
Need of Operating System:
An Operating System provides the user with the ability to design applications
without having to worry about the internal structure of the computer. The user
does not have to worry about different resources like CPU, memory, disk space,
I/O devices and many more.
Following are the needs of an Operating System:
An Operating System also views as a resource allocator. It allocates
different resources to user programs.
Easy interaction between users and computer hardware.
When the power is turned on, the computer starts automatically.
Controlling input output devices and program execution.
Providing security to user programs.
Loading and scheduling user programs.
Managing the use of different computer memories.
What is Operating System:
An Operating System is a program or software that manages the computer
hardware and provides a simple interface to the hardware for user programs.
It is an intermediate program between the user and the computer hardware.
It provides services for the efficient execution of application software.
An Operating System is also viewed as a resource allocator because it allocates
different resources such as CPU time, Memory space, file, storage space, I/O
devices.
Operating Systems perform basic tasks such as receiving input from keyboard,
sending output to the display screen, controlling peripheral devices such as disk
drivers, printers.
The Operating System is also responsible for security and ensuring that
unauthorized users cannot access the computer system.
Fundamental Goals of the Operating System:
There are two main goals of Operating System:
To provide a user friendly and convenient environment.
Efficient and successful operation of the computer system.
Objectives of Operating System:
Following are the objectives of Operating System:
Hide details of computer hardware resources from the user.
Effective management and allocation of resources to the processes.
Acts as an intermediate program between user and computer hardware.
Makes computer system easier to use in an efficient manner.
, Provides effective and efficient environment for the user to execute
programs.
Need of Operating System:
An Operating System provides the user with the ability to design applications
without having to worry about the internal structure of the computer. The user
does not have to worry about different resources like CPU, memory, disk space,
I/O devices and many more.
Following are the needs of an Operating System:
An Operating System also views as a resource allocator. It allocates
different resources to user programs.
Easy interaction between users and computer hardware.
When the power is turned on, the computer starts automatically.
Controlling input output devices and program execution.
Providing security to user programs.
Loading and scheduling user programs.
Managing the use of different computer memories.
