test series

Question

Jobs A, B, C, D and E with running time of 13, 10, 5, 9 and 1 respectively arrive at computer in the time order 0, 5, 7, 10, 12. If the priority of these jobs is in the order C, B, E, A and D and the policy used for scheduling is that a higher priority job always succeeds in preempting. Context switching takes 1 unit of time. The exact number of context switches needed are _______. (Do not count the context switches at time 0 and at the end).

 

plz explain this question

Comments

No. of context switching =  6 ,  is it correct.

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yes it is correct can u explain plz

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Try preemption priority scheduling give priority as it is given C as highest priority than , B ,E, A and D as lowest priority, make Gantt chart and count context switch( do not count first and last ).