Question: Consider three concurrent processes P1, P2 and P3 as shown below, which access a shared variable D that has been initialized to 100. P1 P2

Consider three concurrent processes P1, P2 and P3 as shown below,

Consider three concurrent processes P1, P2 and P3 as shown below, which access a shared variable D that has been initialized to 100. P1 P2 P3 D = D + 20 D=D-50 D = D + 10 The process are executed on a uniprocessor system running a time- shared operating system. If the minimum and maximum possible values of D after the three processes have completed execution are X and Y respectively, then the value of Y-X is

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