Operating Systems - Round Robin Scheduling - Quantum & Turnaround Time
Consider three processes with CPU bursts 5ms, 8ms, and 12ms scheduled with Round Robin using a 4ms quantum. Which statement about their turnaround times is true?
Consider three processes with CPU bursts 5ms, 8ms, and 12ms scheduled with Round Robin using a 4ms quantum. Which statement about their turnaround times is true?
medium🧠🧾 Concept Trace Q4 of Q15
Step-by-Step Solution
Solution:
Step 1: Define turnaround time
Turnaround time = completion time - arrival time, includes waiting due to other processes.Step 2: Evaluate options
A is false because preemption causes waiting; C is false because burst length affects total execution and waiting; D is not always true because arrival times and scheduling order can affect turnaround.Final Answer:
Option A -> Option AQuick Check:
Turnaround time includes waiting caused by other processes [OK]
Quick Trick: Turnaround time = burst + waiting from others [OK]
Common Mistakes:
MISTAKES- Assuming turnaround equals burst time
- Ignoring waiting caused by other processes
Trap Explanation:
PITFALL- Candidates often overlook waiting time in turnaround calculation under Round Robin.
Interviewer Note:
CONTEXT- Checks understanding of turnaround time components in preemptive scheduling.
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