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Which of the following transitions are not possible? (Assume resource preemption is not allowed)

A) 2 and 4

B) 3 and 5

C)4 and 5

D)3 and 5

if resource preemption is not allowed then answer should be A) but answer given is D) how it is possible?

1 Answer

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Irrespective of anything, transitions 3 and 5 are not allowed at all!

 "Ready to Waiting" and  "Waiting to Running" are not possible at all.

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