Question:
Which of the following are necessary conditions for a deadlock?
Which of the following are necessary conditions for a deadlock?
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All four conditions must hold for a deadlock; preventing any one avoids it.
Updated On: Jun 18, 2025
- Mutual Exclusion and Hold and Wait
- Preemption and Circular Wait
- Mutual Exclusion and No Preemption
- Hold and Wait and Preemption
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The Correct Option is A
Solution and Explanation
Deadlock occurs when processes cannot proceed due to resource conflicts.
The four necessary conditions are:
1. Mutual Exclusion: Resources are held in a non-shareable mode.
2. Hold and Wait: Processes holding resources request additional ones.
3. No Preemption: Resources cannot be forcibly taken.
4. Circular Wait: Processes form a circular chain of resource requests.
Option (1) lists two correct conditions.
Option (3) is partially correct but incomplete.
Options (2) and (4) include incorrect conditions (preemption is not a deadlock condition).
The four necessary conditions are:
1. Mutual Exclusion: Resources are held in a non-shareable mode.
2. Hold and Wait: Processes holding resources request additional ones.
3. No Preemption: Resources cannot be forcibly taken.
4. Circular Wait: Processes form a circular chain of resource requests.
Option (1) lists two correct conditions.
Option (3) is partially correct but incomplete.
Options (2) and (4) include incorrect conditions (preemption is not a deadlock condition).
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