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A system assigns elevators but passengers report long waits during peak hours. What is a likely design flaw?

medium📝 Analysis Q7 of 15
LLD - Design — Elevator System
A system assigns elevators but passengers report long waits during peak hours. What is a likely design flaw?
AElevators are assigned without considering current load or direction
BElevators move too quickly between floors
CElevators have too many buttons inside
DElevators use a queue to store requests
Step-by-Step Solution
Solution:
  1. Step 1: Analyze cause of long waits during peak hours

    Ignoring load and direction leads to inefficient assignments and longer waits.
  2. Step 2: Evaluate other options

    Speed, button count, or queue usage do not cause long waits directly.
  3. Final Answer:

    Elevators are assigned without considering current load or direction -> Option A
  4. Quick Check:

    Design flaw = Ignoring load and direction [OK]
Quick Trick: Consider load and direction for assignments [OK]
Common Mistakes:
MISTAKES
  • Blaming elevator speed
  • Ignoring load balancing
  • Misunderstanding request storage

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