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Which data structure is most efficient for spatial queries to find the closest delivery agent to a customer's location?

easy📝 Conceptual Q3 of 15
LLD - Design — Food Delivery System

Which data structure is most efficient for spatial queries to find the closest delivery agent to a customer's location?

AStack
BHash Map
CKD-Tree
DLinked List
Step-by-Step Solution
Solution:
  1. Step 1: Identify spatial query needs

    Finding nearest agent requires efficient spatial indexing.
  2. Step 2: Evaluate data structures

    KD-Tree supports fast nearest neighbor searches in multi-dimensional space.
  3. Final Answer:

    KD-Tree -> Option C
  4. Quick Check:

    Only KD-Tree supports efficient nearest neighbor queries [OK]
Quick Trick: Use KD-Tree for nearest neighbor spatial queries [OK]
Common Mistakes:
  • Using hash maps which do not support spatial queries
  • Choosing linear structures like linked lists or stacks

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