Multi-level Feedback Queue. 1) QUEUE LEVEL QUANTUM IS #1 = 2, #2 = 3, #3 = 4 CPU
ID: 3791523 • Letter: M
Question
Multi-level Feedback Queue.
1) QUEUE LEVEL QUANTUM IS #1 = 2, #2 = 3, #3 = 4 CPU UNITS.
2) NO CPU UNITS ARE TO BE REGISTERED DURING PROCESS TRANSITION.
3) PROCESSES REQUIRED CPU UNITS: A = 4, B = 2, C = 1, D = 7.
4) HIGHER LEVEL WILL PREEMPT A LOWER LEVEL RUNNING PROCESS
(The preempted process will RE-START AT BEGINNING
OF ITS LEVEL WITH REMAINDER OF THE QUANTUM)
5) PROCESS E WILL ENTER AT LEVEL 1 AFTER 7 CPU UNITS NEEDING 3 CPU UNITs.
6) ALWAYS SHOW ONE PROCESS IN THE EXECUTION STATE.
Explanation / Answer
Multilevel Feedback Queue
Q1 = RR(QUANTUM=2)
0--------------------2---------------------4-----------------------5---------------------7--------------------9
Q2 = RR(QUANTUM =3)
10----------------12---------------------15---------------------16
Q3= RR(QUANTUM = 4)
17-------19
Process CPU Burst Q1 = RR (Quantum =2) Remaining time after Q1= RR (Quantum =2) Remaining time after Q2= RR (Quantum =3) Remaining time after Q3= RR (Quantum =4) A 4 2 2 0 - B 2 2 0 - - C 1 2 0 - - D 7 2 5 2 0 E 3 2 1 0 -Related Questions
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