Answer to Question #271725 in Computer Networks for Ikraam Kader

Question

Consider a system with 14 dedicated devices of the same type. All jobs currently running on this system require a maximum of five devices to complete their execution but they each run for long periods of time with just three devices and request the remaining two only at the very end of the run. Assume that the job stream is endless and that your operating system’s device allocation policy is a very conservative one: No job will be started unless all the required drives have been allocated to it for the entire duration of its run.

B)What are the minimum and maximum number of devices that may be idle because of this policy? 

Answer 1

Number of ongoing jobs with ever running machine is 2. Therefore maximun number of devices that maybe idle is 14 +2 = 16 devices, for Minimum is 14 -2 =12devices