Operating Systems - Round Robin Scheduling - Quantum & Turnaround Time
Which of the following statements about turnaround time in Round Robin scheduling is INCORRECT?
Which of the following statements about turnaround time in Round Robin scheduling is INCORRECT?
medium🐞 Bug Identification Q14 of Q15
Step-by-Step Solution
Step 1: Define turnaround time
Turnaround time = completion time - arrival time, always ≥ CPU burst time.Step 2: Analyze each option
Turnaround time includes both waiting time and execution time of a process is correct; turnaround time includes waiting and execution. Turnaround time is the total time from process submission to completion is correct by definition. Turnaround time depends on the time quantum size and the number of processes in the ready queue is correct; quantum size and queue length affect waiting and thus turnaround time. Turnaround time can be less than the CPU burst time if the quantum is large is incorrect because turnaround time cannot be less than CPU burst time regardless of quantum size.Final Answer:
Option C -> Option CQuick Check:
Turnaround time ≥ CPU burst time always.
Quick Trick: Turnaround time ≥ CPU burst time
Common Mistakes:
MISTAKES- Confusing turnaround time with waiting time
- Thinking large quantum can reduce turnaround below burst time
- Ignoring impact of queue length on turnaround
Trap Explanation:
PITFALL- Option B is tempting because large quantum reduces preemption, but turnaround time cannot be less than actual CPU execution time.
Interviewer Note:
CONTEXT- Tests candidate's precise understanding of turnaround time and its relation to quantum and process execution.
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