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A CPU scheduling algorithm determines an order for the execution of its scheduled processes. Given 'n' processes to be scheduled on one processor, how many possible different schedules are there?
  • a)
    n
  • b)
    n2
  • c)
    n!
  • d)
    2n
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
A CPU scheduling algorithm determines an order for the execution of it...
For 'n' processes to be scheduled on one processor, there can be n! different schedules possible. Example: Suppose an OS has 4 processes to schedule P1, P2, P3 and P4. For scheduling the first process, it has 4 choices, then from the remaining three processes it can take 3 choices, and so on. So, total schedules possible are 4*3*2*1 = 4!
Option (C) is correct.
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Most Upvoted Answer
A CPU scheduling algorithm determines an order for the execution of it...
Solution:

Number of possible schedules can be calculated as follows:

- The first process can be selected in n ways.
- The second process can be selected in (n-1) ways.
- The third process can be selected in (n-2) ways.
- Similarly, the kth process can be selected in (n-k+1) ways.
- The last process can be selected in 1 way.

Therefore, the total number of possible schedules = n x (n-1) x (n-2) x ... x 2 x 1 = n!

Hence, the correct answer is option C - n!
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A CPU scheduling algorithm determines an order for the execution of its scheduled processes. Given n processes to be scheduled on one processor, how many possible different schedules are there?a)nb)n2c)n!d)2nCorrect answer is option 'C'. Can you explain this answer?
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