Operating Systems - Round Robin Scheduling - Quantum & Turnaround Time
In a system with many short and few very long CPU-bound processes, which Round Robin quantum choice best balances fairness and turnaround time?
In a system with many short and few very long CPU-bound processes, which Round Robin quantum choice best balances fairness and turnaround time?
hard⚖️ Approach Comparison Q8 of Q15
Step-by-Step Solution
Solution:
Step 1: Consider short vs long process needs
Short processes benefit from finishing quickly; long processes need preemption to avoid starvation.Step 2: Evaluate quantum sizes
A causes high overhead; B reduces fairness; D causes excessive context switches.Step 3: Choose balanced option
C balances finishing short processes quickly and preempting long ones for fairness.Final Answer:
Option D -> Option DQuick Check:
Moderate quantum balances fairness and turnaround [OK]
Quick Trick: Moderate quantum balances short and long process needs [OK]
Common Mistakes:
MISTAKES- Choosing extremes of quantum size
- Ignoring overhead vs fairness trade-off
Trap Explanation:
PITFALL- Candidates often pick extremes ignoring trade-offs in mixed workloads.
Interviewer Note:
CONTEXT- Assesses ability to apply Round Robin tuning to real-world mixed workloads.
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