Operating Systems - Starvation vs Deadlock vs Livelock - Differences & Examples
You are designing a real-time system where missing deadlines is critical. Which approach best minimizes the risk of starvation without risking deadlock?
You are designing a real-time system where missing deadlines is critical. Which approach best minimizes the risk of starvation without risking deadlock?
hard🌍 Real-world Scenario Q9 of Q15
Step-by-Step Solution
Solution:
Step 1: Identify requirements
Minimize starvation and avoid deadlock in real-time system.Step 2: Evaluate options
Use priority scheduling with aging and implement a resource hierarchy to prevent circular waits. combines aging (prevents starvation) and resource hierarchy (prevents deadlock).
Use round-robin scheduling without priority to ensure fairness. ensures fairness but may miss deadlines.
Use strict priority scheduling without aging to guarantee high-priority tasks run first. risks starvation of low-priority tasks.
Use optimistic concurrency control to avoid locking resources. avoids locking but may not guarantee deadlines or prevent starvation.Final Answer:
Option A -> Option AQuick Check:
Aging + resource hierarchy balances starvation and deadlock [OK]
Quick Trick: Combine aging and resource hierarchy to prevent starvation and deadlock [OK]
Common Mistakes:
MISTAKES- Choosing fairness over deadlines
- Ignoring deadlock prevention
- Overlooking starvation in strict priority
Trap Explanation:
PITFALL- Candidates often pick fairness or strict priority ignoring combined starvation and deadlock risks in real-time systems.
Interviewer Note:
CONTEXT- Assesses ability to design systems balancing starvation and deadlock constraints.
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