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Consider three CPU intensive processes, which require 10, 20, 30 units and arrive at times 0,2,6 respectively. How many context switches are needed if shortest remaining time first is implemented? Context switch at 0 is included but context switch at end is ignored
  • a)
    1
  • b)
    2
  • c)
    3
  • d)
    4
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Consider three CPU intensive processes, which require 10, 20, 30 units...
Scheduling Algorithm:
shortest remaining time first
Gantt chart:

Process table:


Number of context switches = 2
Since initial is included 
Therefore total context switches = 1 + 2 = 3
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