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Explain process scheduling in multiprogramming
Multiprogramming is able to be defined as a set of following features:
1. A mix of CPU bound and IO bound processes live in the system
2. An IO bound process has superior priority that a CPU bound process
3. Process priorities are static and do not change with time
4. Process scheduling is preventative a low priority running process is preempted if a higher priority process becomes ready
The following figure exemplify the process state transitions in multiprogramming
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Enhanced Second chance algorithm In this a modify bit is as well used. Now if the ordered pair of reference and modify is (0,0) neither recently used nor modified - the best
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