Nilesh Hadalgi | Techie Programmer on Instagram: "A hashtable is a data structure that stores key–value pairs and enables fast data access. It uses a hash function to convert each key into an index in an underlying array, allowing average-case constant time complexity for insert, search, and delete operations. Collisions, where multiple keys map to the same index, are handled using techniques like chaining or open addressing. Hashtables are widely used for implementing dictionaries, caches, and