LLD - Design — Parking Lot System
Given a system using a mutex lock for a shared resource, what happens if a thread tries to acquire the lock while it is already held by another thread?
Given a system using a mutex lock for a shared resource, what happens if a thread tries to acquire the lock while it is already held by another thread?
medium📝 Analysis Q5 of 15
Step-by-Step Solution
Solution:
Step 1: Understand mutex lock behavior
A mutex lock allows only one thread to hold it at a time; others must wait.Step 2: Determine thread behavior on locked mutex
If a thread tries to acquire a locked mutex, it blocks until the lock is free.Final Answer:
The thread waits (blocks) until the lock is released -> Option AQuick Check:
Mutex lock blocks waiting threads = true [OK]
Quick Trick: Mutex blocks threads until lock is free [OK]
Common Mistakes:
MISTAKES- Assuming thread acquires lock immediately
- Thinking thread throws error on lock contention
- Believing thread skips critical section automatically
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