1) The four (4) main components of a computer system are: Processor: controls th
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Question
1) The four (4) main components of a computer system are: Processor: controls the operation of the computer and performs its data processing functions Main memory: stores both data and instructions; I/O modules: which move data between the computer and its external environment System Bus: provides for communication among processors, main memory, and I/O modules Which of the above 4 components do you believe is most important?
Why? Hint: In a job interview, you have no access to anything, including the web.
2) Adding more processors (CPUs) to a computer system, regardless the kind of operating system is in use, will always improve the performance of the computer system.
Is the above statement correct? Please explain
3) “Booing up the system” means booting up the operating system. Hence, the operating system is not capable of booting up itself. Please explain how an operating is booted up?
Explanation / Answer
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Amongst the following, the system bus is the most important because without it, all the separate modules will work in solo but this will not compute towards a fully functional environment where there is interaction amongst all the other hardware, which is necessary for a system to be able to compute, develop and interact with the external environment.
Increasing the amount of CPU processors does not guarantee that the system is going to be better than another. In fact, it depends highly on the power of other systems as well as the restraints of the current operating system which works on the theory of bottlenecks.
Think of it as a 4 lane highway which has a speed limit of 30mph, you can argue that there are 4 lanes which would mean 4X the amount of distance you can travel, but, this doesn’t mean that you can run at a 100mph, due to the constraints of the system.
The operating system is not able to boot itself up because it is stored in the hard drive which operates at a much slower speed than the processor and is not able to keep up with it. When the system powers on, it performs a POST test (power on self test) to determine if all the components required to boot up the OS are working correctly. The bios then executes the minimum amount of requirements from its memory that then boots up the operating system from the hard drive of the computer.
Hope this helps...
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