juniorHeaps and Maps
What is a Hash Map?
Updated Apr 28, 2026
Short answer
A data structure that stores key-value pairs using a hash function to map keys to bucket indices.
Deep explanation
Heaps and Maps are fundamental for optimization. A data structure that stores key-value pairs using a hash function to map keys to bucket indices. Heaps are used for priority management, while Maps provide constant-time data retrieval.
Real-world example
Priority queues in operating systems.
Common mistakes
- Confusing a Heap with a sorted array.
Follow-up questions
- Is a Heap a sorted structure?