An operating system is the most important part of a Computer system, it does not matter whether it is a personal computer or big computer robot working in a manufacturing factory everything needs an Operation system so the specific program gets an environment to run. When the program run and execute on the operating system the hardware works according to it. Here in this article, we will discuss the most important type of Operating system.
What is an Operating System?
An Operating system is a program which provides an environment to the other program so they can run and Execute. The main purpose of an Operating system is to provide an interface between the user and the system hardware so the Hardware of the system works according to the specified program.
Some Main Function of Operating System:
The operating system performs many functions, which make easy to use a particular device.
- Memory Management: Memory management is the key feature of the Operating systems. OS always keep tracking the use of memory and allocate & deallocate the memory to the program according to the demand.
- Processor Management: It can control the use of processor and allocate & deallocate the processor process.
- Device Management: The operating system keeps tracking of all the devices linked to it. In this Operating system decide which device should get which process
- File Management: It keeps tracking on all the stored files. It can delete and generate a new file.
- Security Management: It provides protection from the unauthorized activities and in the term of password, it also provides privacy to the user.
- Detect-Error: It shows the error messages and different debugging notification if there is any problem in the Operating system
- Coordination Between User and software: It provides an interface so the user can directly approach the software.
Types of Operating Systems
Though there are many types of Operating Systems, here we have mentioned only those which are most important and yet in use.
- Batch Operating System
- Interactive Operating System
- Real-Time Operating System
- Multiprogramming Operating System
- Timesharing Operating System
- Multiprocessing Operating System
- Distributed Operating System
Batch Operating System
In Batch Operating System the user does not have direct access to the computer and cannot directly interact with it either. In this job has been prepared for each user and all those jobs have been imprinted or stored in the punch card-like structure, which is submitted to the computer operator. This kind of Operative systems mostly works on the offline devices and once the punch card is submitted to the computer operator the computer works according to the code or program is written on the card.
- The performance of the Batch mode increased as the new job starts
- No Direct interaction between the user and the system
- Difficult to debug
- Lack of Protection.
Interactive Operating System
In Interactive Operating System there is a direct interaction between the user and the computer. Mostly all the Personal Computers are Interactive Operating System. In this kind of Operating system, the user input some command in the system and the system works according to it.
Real-Time Operating System
An RTOS is a data processing system which responds time to the input is very short. It RTOS is also known as the brain of the real-time system because of its immediate response to the input. The response to the input in RTOS is display in a specific time period though the time period is very short it does not show any kind of disparity.
There are two types of Real-Time Operating Systems
- Hard Real Type System: In Hard Real Type system if the response takes more time than the specified time interval, the system will show fail results. The secondary storage is also limited in Hard Real Type systems
- Soft Real Type System: The soft real type system does not fail the program if the response takes more time than the specified time, it would just show the output but it can compromise with the accuracy of the response.
Multiprogramming Operating System
In multiprogramming Operating system, the Operating system is able to execute different programs at once. Though the computer is cannot execute all the program at once because of switching between the jobs it seems that it does. It stores all the jobs in the main memory and spontaneously works on each the speed is so fast it looks like the computer is executing all the job at once.
In Multiprogramming System, the CPU switches the processing from one Job to another job so fast so it could process on each and every job. This Operating System is an ideal approach to Resource Management with maximum resource utilization.
Timesharing Operating System
It is similar to the multiprogramming system with some additional extensions. In Timesharing OS, the system is capable of handling multiple jobs simultaneously and here the processor time shared among all the multiple users.
With Timesharing O.S. users at different location or terminals can access the same computer at the same time and here the processing time shear among all the users. Here CPU use the switching mechanism which helps the CPU to switch from one job to another so each job gets equal and requires processing.
Multiprocessing Operating System
A Multiprocessing operating system consists of multiple processors to execute the programs and all the processors are connected to the main peripheral. With the help of multiple processor or CPU, the program can execute simultaneously on the main memory of the system.
Because of multiple CPUs, this kind of operating system does not follow the switching method instead they actually perform the parallel execution method. We use this kind of Operating system when we have many jobs to perform and the single CPU switching takes much more time to execute all the processes. These days all the system use this kind of operating systems such as Octa-core processor or a dual-core processor.
Distributed Operating System
In this Operating system, different computers interact with each other and communicate in order to exchange data. Internet works on this system where everyone linked with each other just to communicate. It can also be termed as the networking operating system which supports a high level of communication.
It uses multiple processors to perform the multiple real-time application on the user terminal. In this system, the processor does not shear memory because each CPU has its own local memory.
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