I was posed this question in my studies. An operating system is said to have two, conflicting definitions of purpose:
- Presenting a virtual machine with a user-friendly GUI to a user which isolates them from the low-level hardware
- It must manage, efficiently, the limited resources of the hardware system
Firstly I tend to agree that the two conflict in nature. If we think of the operating system on the whole and then think of the goal of efficiently managing resources it will not take long to realise that the nature of an operating system is not entirely geared towards efficiency. On the surface the limited resources of the computer are often wasted on things like graphical effects and enhancements like transparency and animation. Often the resources required to perform these seemingly meaningless tasks are very taxing on the system hardware.
If I look at the question again, the phrase “manage in the most efficient way the (always) limited resource of the computer system” (University of Liverpool, 2010), I would say that it does manage the resources of the operating system quite efficiently, because, regardless of the task at hand, the computer manages to operate quite smoothly when doing its multi-tasking and just looking at the task manager in Windows 7 you are able to see just how many tasks are running at any one time, and the computer still operates responsively and seemingly effortlessly. What I’ve just mentioned does entirely depend on the spec of hardware that your computer is running, RAM and CPU speed etc. but if you follow the minimum requirements performance is generally as it is expected.
My conclusion is that I do think that they work together quite effectively as, in this specific answer of mine, Windows 7 as an operating system is very user friendly while still managing the computers resource efficiently and quickly (despite its predecessor, Vista, which did not manage resources as well). The concept of a process is absolutely vital to the success of both managing the hardware efficiently and providing a user friendly environment. A process is defined as a dynamic activity who’s properties change as time progresses (Brookshear, J, pp.134), coupled with multiprogramming is a way in which different activities and resources are managed and organised, without this there would be chaos and I believe the computer would be sent back to the days of batch processing single tasks.
Brookshear, J.G (2009) Computer Science: An Overview. 10th ed. China: Pearson Education Asia Ltd.