Which of the following statements are correct?
Which of the following statements are correct?
Answer: A. Round robin is a pre-emptive scheduler and does not have starvation.; B. FCFS schedulers suffer from convoy effect. — A: Round robin is a pre-emptive scheduler and do not have starvation. (True) B: FCFS scheduler suffer from convoy effect. (True) Convoy effect occurs when a…
- A.
Round robin is a pre-emptive scheduler and does not have starvation.
- B.
FCFS schedulers suffer from convoy effect.
- C.
Preemptive schedular lets the process finish its CPU burst but preempts the process when it went for I/O operation.
- D.
Multilevel feedback queue scheduler gives priority to I/O intensive process.
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Show answer & explanation
Correct answer: A, B
A: Round robin is a pre-emptive scheduler and do not have starvation. (True)
B: FCFS scheduler suffer from convoy effect. (True)
Convoy effect occurs when a slow process slows down the performance of entire set of process. It occurs only in non-preemptive scheduler as in preemptive the faster process have higher priority so it gets preempted.
C: Preemptive scheduler preempts the process with if higher priority process arrives or if time quantum expires not during I/O operation (False)
D: Multilevel feedback queue gives priority to process with shorter I/O bound then to process with shorter CPU bound then to longer I/0 bound and the to longer CPU bound.