Operating System Overview
So let’s start with what is Operating System?
1 Operating System Overview2 Types of Operating System2.1 The architecture of Operating systems3 Main functions of an operating system3.1 Hardware Management3.2 Program Control3.3 Data Access3.4 Resources Management3.5 Communication
The operating system is the software that has the responsibility of managing computer hardware, software resources and offers common services to smoothly run the computer programs. The time-sharing operating system schedules tasks for the effective running of the system which also includes cost-efficiency of the processor time, mass storage of printing and other useful resources. In simple words we can say the main purpose of an Operating System is to provide an environment in which we can execute programs. The hardware functions handled by the operating system are such as input and output and memory allocation. The main role of the operating system is functioning as an intermediary between the software and the hardware. However, the application code is generally executed directly by the hardware and makes regular calls to the system calls to an OS function or interrupted by it. The operating system can be seen on multiple devices that contain the computer system such as phones, video game consoles, supercomputers, and other similar devices. The most common and used operating system is Microsoft Windows which is used by 82.74% market share. The rest of the market is occupied by macOS, Linux, and Android.
Types of Operating System
There are four general types of operating systems. Their use depends on the type of computer and the type of applications that will be run on those computers.
The architecture of Operating systems
The operating systems control the hardware resources of a computer. The kernel and shell are the parts of the operating system that perform essential operations. When a user gives commands for performing any operation, the request goes to the shell part, which is also known as the interpreter. The shell part then translates the human program into machine code and then transfers the request to the kernel part.
When the kernel receives the request from the shell, it processes the request and displays the result on the screen. The kernel is also known as the heart of the operating system as every operation is performed by it. Shell The shell is a part of the software which is placed between the user and the kernel, and it provides services of the kernel. The shell thus acts as an interpreter to convert the commands from the user to the machine code. Shells present in different types of operating systems are of two types: command-line shells and graphical shells. The command-line shells provide a command line interface while graphical line shells provide a graphical user interface. Though both shells perform operations, the graphical user interface shells perform slower than the command line interface shells. Types of shells
Korn shellBourne shellC shellPOSIX shell
Kernel The kernel is a part of the software. It is like a bridge between the shell and hardware. It is responsible for running programs and providing secure access to the machine’s hardware. The kernel is used for scheduling, i.e., it maintains a timetable for all processes. Types of Kernels
Monolithic kernelMicrokernelsExokernelsHybrid kernels
Main functions of an operating system
Every computer system needs an operating system to function properly. The most function of the operating system is to offer a smooth user interface and control the functioning of the other applications. But, there are plenty of other important functions which are managed by the operating systems such as –
Hardware Management
The most important and basic function of the operating system is to manage all the internal and external hardware of the computer. The operating system manages all the connected devices and tells them how to operate and interact with the system. That’s because presenting the result of instructions and interactions are the basic performance of the computer. Some of the hardware systems which are controlled by the operating system include – hard disk, optical drives, video cards, etc.,
Program Control
The operating system also runs programs and enable them to function for which they have been designed. The program needs to be designed to function with the particular operating system. That’s because the operating system is required to display the interface and surge communication between the program and the hardware of the computer. In the absence of the operating system, programs can’t perform their designated task.
Data Access
It is also a function of the operating system to store, retrieve and access the data on the hard drive so that the basic functions can be performed by the operating system. It is also the responsibility of the operating system to manage the data stored temporarily in the computer’s RAM. The data which is stored and retrieved by the operating system could be of any type such as document files, pictures, videos, and music. The hard drive can read and write the data on its own, but the operating system tells the hard drive which data to read and the method to write it.
Resources Management
The functioning list of the operating system is very strong, it also includes the function of managing and allocating all the resources of the computer at the time of a need. Resource management like which task should be first processed by the CPU? Which program needs to be aligned to process the power and memory of the computer system? How to allocate the program to control the functioning of the computer? And, so many other resources related decisions are taken up by the operating systems. The important functions are given priority by the operating systems so that regular functions of the computer won’t get disturbed.
Communication
The operating system also facilitates network communication by enabling connected network devices to communicate with the computer and with any programs that require them. It is one of the primary functions of the OS to provide network communication with the help of different tools like network cards. The network cards can only establish the connection between the networks and tools, but to direct the communication process so that information can be exchanged – an operating system is required. The operating system also analyses the information that has been exchanged so that the installed program can offer the best display to the users. So, the operating system is a very important part of the computer and other computer-based devices as multiple functions are handled by them. If you don’t want to disturb the functioning of the operating system, then always use the correct operating system on your computer to support its functioning.
What is the difference between CPU and GPU?What Is The Difference Between A VPN And A Proxy and how do they work?How to Fix Printer Problems in Windows 10 Laptop10 Warning Signs that Your Windows 10 is Virus Malware InfectedLaptop freezes randomly after Install Windows 10 update? Try these solutions
