The average latency on a disk with 2000 sectors is about 100 msec. Seek time is 1 msec.
One of the methods for communication between CPU and input/output (I/O) devices is through polling. It was said that one advantage of polling is that the CPU can determine when and how often it would like to servicean I/O device. However, this can also be achieved through the use of interrupt. Can you explain how? Give an example that shows your understanding of how this works. Be verbose.
Real time operating system is important for many applications.
It is possible that while the CPU is servicing an interrupt from device A (can be a DMA interrupt but it can be any kind of interrupt), device B interrupts CPU. If the CPU would like to ignore device B’s interrupt because device B is deemed to have a lower priority, how would it go about it? Be verbose.
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