Question: a) A computer system has enough room to hold five programs in its main memory. These programs are idle waiting for I/O half the time.

a) A computer system has enough room to hold five programs in its main memory. These programs are idle waiting for I/O half the time. What fraction of the CPU time is wasted.

b) A real-time system has four periodic events with periods of 50, 100, 200, and 250 msec each respectively. Suppose that the four events require 35, 20, 10, and x msec of CPU time, respectively. What is the largest value of x for which the system is schedulable? 12

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