Question: o implement a MLFQ scheduler, below which one is NOT an open challenge? a . How many different level of priority queue should be set

o implement a MLFQ scheduler, below which one is NOT an open challenge?
a.
How many different level of priority queue should be set up?
b.
How to treat I/O bound job more fair?
c.
How long a time slice should be set to?
d.
How often to boost the jobs at the lowest priority?

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