LLD - Design — Elevator System
Given a system where emergency alerts are queued and processed asynchronously, what is the expected output if the queue is full and a new alert arrives?
Given a system where emergency alerts are queued and processed asynchronously, what is the expected output if the queue is full and a new alert arrives?
medium📝 Analysis Q4 of 15
Step-by-Step Solution
Solution:
Step 1: Understand queue behavior under full load
When a queue is full, new incoming items are typically dropped or rejected to avoid blocking or overflow.Step 2: Evaluate other options
Immediate processing is impossible if queue is full. Automatic resizing depends on implementation but is not guaranteed. Crashing is a failure, not expected behavior.Final Answer:
The new alert is dropped or rejected -> Option BQuick Check:
Full queue behavior = Drop new alerts [OK]
Quick Trick: Full queues usually drop or reject new items [OK]
Common Mistakes:
MISTAKES- Assuming queue auto-expands always
- Expecting immediate processing despite full queue
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