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Process States

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Please provide insight regarding the attached diagram and questions. Please provide references. Please explain the concept of process states and how you draw your conclusions for the three questions.

The following diagram indicates process states. The arrows between the boxes indicate state transitions.

(See attachment for diagram).

a) For each transition, describe an event that could cause it
b) Why is there no arrow from the wait to the running state?
c) Why is there no arrow from the ready to the wait state?

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Solution Summary

The solution explains the concept of process states and how you draw your conclusions for three different questions.

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Reference:
http://jan.netcomp.monash.edu.au/OS/l8_2.html

Process states
When a process is using the CPU, it is actually running and doing some work. However, it will not always stay in that state.
If a process does I/O and the device is not ready or just slow, the process will become blocked and be unable to do any more work until the I/O is complete.
In a multitasking environment, a process is not allowed to use the CPU all the time. At intervals (maybe signalled by a timer interrupt) it will be stopped by the O/S so that another ...

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