Solution:Step 1: Understand global orderingEnforcing a strict order prevents circular wait, thus preventing deadlocks proactively.Step 2: Understand dynamic detectionDynamic detection incurs runtime overhead and may require rollback, impacting performance.Step 3: Compare efficiencyGlobal ordering av

[Solved] In designing a system to avoid deadlocks during multiple resource locking, which approach is generally more efficient:... | Operating Systems

Operating Systems - Deadlock - Four Necessary Conditions (Coffman)

In designing a system to avoid deadlocks during multiple resource locking, which approach is generally more efficient: (1) enforcing a global resource acquisition order, or (2) using dynamic deadlock detection with rollback? Why?

ANeither approach affects deadlock occurrence or system efficiency

BDynamic detection with rollback is more efficient because it avoids restricting resource acquisition order

CBoth approaches have equal efficiency in all scenarios

DEnforcing a global order is more efficient because it prevents deadlocks proactively without runtime overhead

Step-by-Step Solution

Solution:

Step 1: Understand global ordering
Enforcing a strict order prevents circular wait, thus preventing deadlocks proactively.
Step 2: Understand dynamic detection
Dynamic detection incurs runtime overhead and may require rollback, impacting performance.
Step 3: Compare efficiency
Global ordering avoids runtime overhead, making it generally more efficient.
Final Answer:
Option D -> Option D
Quick Check:
Proactive prevention avoids overhead [OK]

Quick Trick: Prevent deadlocks proactively to reduce overhead [OK]

Common Mistakes:

MISTAKES

Assuming dynamic detection is always more efficient
Believing global ordering restricts concurrency excessively
Ignoring rollback costs in dynamic detection

Trap Explanation:

PITFALL

Dynamic detection seems flexible but ignores overhead and rollback costs.

Interviewer Note:

CONTEXT

Tests ability to evaluate deadlock prevention vs detection trade-offs.

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Solution Trace

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Why?

Step 1: Understand global ordering

Step 2: Understand dynamic detection

Step 3: Compare efficiency

Final Answer:

Quick Check:

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