Our Operating System Tutorial begins with What is Operating System. Operating System is defined as an interface between user and hardware. It is responsible for performing tasks in an efficient manner.
Components of Operating System
Components of operating system are as follows:
- Computer Hardware : It includes all the hardware components of system.
- Operating System : A special program acting as an interface.
- System and Application Program : These are the programs/applications residing in our computer.
- Users : At the top level we have the users who interact with these applications.
Kernel is the central component of operating system. The basic operation of kernel is to manage the communication between software and hardware.
While kernel is innermost component of operating system , shell is the outermost component.
Views of Operating System
- User View
The user view is the viewpoint of a user for operating system.
The user view point include things like how to maximize performance of system.
Another user view point is that operating system acts as resource allocator.
2. System View
The system view is the form the viewpoint of the system.
The system viewpoint is that operating system acts as resource allocator.
Other system viewpoint of operating system controls execution of programs.
Another system viewpoint of operating system is to minimize effort of user and maximize performance.
Tasks performed by Operating System
- Process management : It includes operations like creation, management, termination of processes or deadlocks.
- Memory Management : It includes memory management techniques which optimizes the overall performance of system
- Disk Management : It is used to create, delete, format partitions, assign drive letters to the files int the hard disk.
- CPU scheduling : This means to schedule the processes in an efficient, easy and fair way such that all processes get ample amount of execution.
- File Management : It is defined as process of manipulating files in computer system.
- Security : It refers to provide protection to CPU, memory disks or software programs.
- Operating system supervises and protect the system.
- Operating System is responsible for program execution.
- Operating System acts as resource allocator.
- Operating System handles errors.
- Operating system handles I/O operations.
- Operating system is responsible for multitasking