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Measurement of a round-robin scheduling experiment has set the average process runtime for Rns before blocking for an I/O. Th

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Answer #1

Answer) B. 1/2

R is the average time a process runtime before I/O block

S is the context switch time.

Q is the time quantum.
and Q=S(given)
The efficiency of the CPU is:

= R/(R/Q)*S+R

= Q/(Q+S)

Since, Q=S (given)
Efficiency is 1/2

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