[Solved] What issue arises if a binary semaphore used as a mutex is initialized with a value greater than 1? - Ans: It allows multiple threads to enter the critical section simultaneously,... | Operating Systems

Operating Systems - Semaphore vs Mutex - When to Use Which

What issue arises if a binary semaphore used as a mutex is initialized with a value greater than 1?

AIt behaves exactly like a mutex with no issues

BIt causes the semaphore to deadlock immediately

CIt allows multiple threads to enter the critical section simultaneously, breaking mutual exclusion

DIt prevents any thread from entering the critical section

Step-by-Step Solution

Solution:

Step 1: Understand binary semaphore initialization
Binary semaphore initialized >1 allows multiple acquires without blocking.
Step 2: Effect on mutual exclusion
Multiple threads can enter critical section simultaneously, violating mutual exclusion.
Final Answer:
Option C -> Option C
Quick Check:
Binary semaphore >1 breaks mutual exclusion [OK]

Quick Trick: Binary semaphore must be initialized to 1 for mutex behavior [OK]

Common Mistakes:

MISTAKES

Trap Explanation:

PITFALL

Interviewer Note:

CONTEXT

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What issue arises if a binary semaphore used as a mutex is initialized with a value greater than 1?