Operating system

Operating System (OS)

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An operating system (OS) is system software that manages computer hardware, software resources, and provides common services for computer programs.

Some Examples of OS

Some examples of operating system are:1. Microsoft Windows 2. Mac OS 3. Linux 4. Unix

Functions of Opearting System

1. Process management helps OS to create and delete processes. It also provides mechanisms for synchronization and communication among processes. 2. Memory management performs the task of allocation and de-allocation of memory space to programs in need of this resources. 3. File management manages all the file-related activities such as organization storage, retrieval, naming, sharing, and protection of files. 4. Device Management keeps tracks of all devices. 5. I/O System Management is one of the main objects of any OS is to hide the peculiarities of that hardware devices from the user. 6. Security module protects the data and information of a computer system against malware threat and authorized access. 7. Command interpretation module is interpreting commands given by the and acting system resources to process that commands.

8. Networking is a distributed system is a group of processors which do not share memory, hardware devices, or a clock. The processors communicate with one another through the network. 9. Job accounting keeps track of time & resource used by various job and users. 10. Communication management module helps in coordination and assignment of compilers, interpreters, and another software resource of the various users of the computer systems.

Advantage of using Operating System

• Allows you to hide details of hardware by creating an abstraction
• Offers an environment in which a user may execute programs/applications
• It acts as an intermediary among applications and the hardware components
• It provides the computer system resources with easy to use format
• Acts as an intermediator between all hardware's and software's of the system

Disadvantages of using Operating System

• If any issue occurs in OS, you may lose all the contents which have been stored in your system
• Operating system's software is quite expensive for small size organization which adds burden on them. Example Windows
• It is never entirely secure as a threat can occur at any time

What is Kernel in Operating System?

The kernel is the central component of a computer operating systems. The only job performed by the kernel is to the manage the communication between the software and the hardware. A Kernel is at the nucleus of a computer. It makes the communication between the hardware and software possible. While the Kernel is the innermost part of an operating system, a shell is the outermost one. Two most popular kernels are Monolithic and MicroKernels.