Operating Systems Assignment Help
Vital software that runs on a computer is the operating system. The computer’s memory processes, and all of its software and hardware are managed by the operating system. Moreover, communication between the user and the computer is possible, even though, the computer’s language may be unknown. Hence, a computer is useless without an operating system.
An operating system is a prerequisite for the execution of other programs. It’s imperative for each and every computer to have an operating system so that other programs can be executed successfully. Operating systems perform fundamental tasks;
- recognizing input from the keyboard
- sending output to the display screen
- keeping track of files and directories on the disk, and
- controlling peripheral devices such as disk drives and printers to name a few
Just about anybody would be familiar with the phrase “boot your computer”, but there are very few who know what it means. When the power button is pressed to turn the computer on that is when the process of booting begins. It usually takes about a minute or two and within that time the computer performs multiple tasks known as power-on-self-test:
- it runs tests to make sure everything is working flawlessly
- it checks for new hardware.
- it then starts up the operating system.
Often different programs may run simultaneously and the central processing unit, memory, and storage ought to be accessible to all these various programs. The operating system plays the role of a coordinator and facilitator to ensure each program’s needs are met satisfactorily.
It can hardly be emphasized enough how very vital an operating system’s role is and with robust systems it becomes all the more vital. The role that an operating system plays is similar to that of a traffic police ensuring that there is no interference between various programs and users running simultaneously. The onus is on the operating system to shoulder the security of the system and ensure that unauthorized users do not access the system.
With the progress and development of computers, the operating systems have developed and progressed as well. There are several types of operating systems and they are as follows:
Graphical User Interface consists of graphics and icons and is usually navigable with the click of a mouse. Examples of graphical user interface operating systems are:
- System 7.x
- Windows 98
- Windows CE
With a multi-user operating system, multiple users can use the computer concurrently or at different times. Operating systems that belong to this category are:
- Windows 2000
An operating system that is able to support and utilize more than one computer processor is known as a multi-processor operating system. Multiprocessor operating systems are:
- Windows XP
An operating system that supports several software processes running simultaneously is a multitasking operating system and they are:
- Windows 7
Operating systems that permit various components of a software program to execute simultaneously are multi-threading operating systems. A few examples of operating systems that would qualify as multi-threading operating system are as follows:
- Windows XP
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