An efficient data structure, hash tables, bring speed to data retrieval. Here's how they work:
- Hash Function: Converts input (keys) into an index in a table.
- Handling Collisions: Techniques like chaining and open addressing exist.
- Applications: Used in databases, caches, and more for quick data lookups.
- Efficiency: Average time complexity is O(1) for search, insert, and delete.
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