https://wiki.quizz.vn/ 2026-06-26T16:30:52+00:00 https://wiki.quizz.vn/ https://wiki.quizz.vn/lib/exe/fetch.php?media=wiki:dokuwiki.svg text/html 2026-05-23T22:55:33+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.quizz.vn/doku.php?id=data-structures-algorithms:hash-table-concept&rev=1779576933&do=diff Hash Table Concept A hash table is a data structure that stores data as key-value pairs and uses a hash function to quickly compute the storage location. Basic Idea When we write: set("abc", "xyz") Internally, it becomes: index = hash("abc") % array_size A[index] = ("abc", "xyz") text/html 2026-05-23T23:06:15+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.quizz.vn/doku.php?id=data-structures-algorithms:redis-rabbitmq-kafka-data-structure-comparison&rev=1779577575&do=diff Redis vs RabbitMQ vs Kafka (Data Structure Comparison) 1. Redis Yes — Redis main data structure is: * Hashtable (key → value) stored in RAM Key idea * Very fast lookup: O(1) * Works like an in-memory dictionary Mental model * Redis = key-value store (like a dictionary / hashmap)