Operating Systems - Starvation vs Deadlock vs Livelock - Differences & Examples
What is the trade-off of using aging to prevent starvation in a priority-based scheduling system?
What is the trade-off of using aging to prevent starvation in a priority-based scheduling system?
medium🪤 Complexity Trap Q5 of Q15
Step-by-Step Solution
Solution:
Step 1: Understand aging effect
Aging gradually increases priority of waiting tasks to prevent starvation.Step 2: Analyze trade-offs
Aging can lead to priority inversion, causing high-priority tasks to wait longer.: Aging can cause priority inversion where a lower-priority task temporarily has higher priority, delaying high-priority tasks.
Aging increases the time complexity of the scheduler to O(n²).: Aging does not increase scheduler complexity to O(n²); it is typically O(n).
Aging eliminates deadlocks but increases livelock risk.: Aging does not eliminate deadlocks or increase livelock risk.
Aging reduces starvation but may cause lower-priority tasks to starve.: Aging prevents starvation of low-priority tasks, not causes it.Final Answer:
Option B -> Option BQuick Check:
Aging may cause priority inversion delays [OK]
Quick Trick: Aging can cause priority inversion delays [OK]
Common Mistakes:
MISTAKES- Confusing aging with deadlock prevention
- Overestimating complexity impact
- Misunderstanding starvation effects
Trap Explanation:
PITFALL- Candidates often overlook that aging can cause priority inversion, mistakenly thinking it only helps without side effects.
Interviewer Note:
CONTEXT- Tests understanding of aging trade-offs and priority inversion.
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