LLD - Design — Elevator System
In a multiple elevator system, the controller assigns requests but sometimes an elevator gets stuck and does not update its position. What is the likely problem and how to fix it?
In a multiple elevator system, the controller assigns requests but sometimes an elevator gets stuck and does not update its position. What is the likely problem and how to fix it?
medium📝 Analysis Q14 of 15
Step-by-Step Solution
Solution:
Step 1: Identify cause of stuck elevator in system
If elevator position is not updated, controller cannot assign requests properly.Step 2: Determine fix
Adding regular position updates and health checks ensures controller has current elevator status to assign requests correctly.Final Answer:
Elevator state not updated; add regular position updates and health checks -> Option AQuick Check:
Missing updates cause stuck state; fix with health checks [OK]
Quick Trick: Ensure elevator regularly reports position to controller [OK]
Common Mistakes:
MISTAKES- Assuming hardware failure without checking software updates
- Blaming random assignment logic
- Ignoring elevator state updates
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