JavaScript Hashing Coding Practice Problems Last Updated : 25 Feb, 2025 Comments Improve Suggest changes Like Article Like Report Hashing is a fundamental concept in JavaScript used to map data to a fixed-size value, enabling fast lookups, efficient data retrieval, and optimized storage. Hashing is commonly used in hash tables, caching, data indexing, and cryptography to store and retrieve values efficiently.This curated list of JavaScript Hashing Coding Practice Problems will help you master hashing techniques. Whether you're a beginner or an experienced developer, these problems will enhance your understanding of hash functions, collision resolution techniques, and hash-based data structures, improving your problem-solving abilities.Hashing Practice ProblemsEasyArray SubsetUncommon CharactersRepeated CharacterExceptionally OddCheck if a String is Isogram or NotFind Unique ElementCount the CharactersCount Pair SumSort the String in Descending OrderCount Number of Elements Between Two Given Elements in ArrayUnique NumbersCheck Arithmetic ProgressionString ReversalSubstrings with Same First and Last CharactersSmallest Number Repeating K TimesDemonetisationUnion of Arrays with DuplicatesCheck Equal ArraysTwo Sum - Pair with Given SumFrequencies in a Limited ArrayFirst Repeating ElementNon-Repeating CharacterIntersection of Arrays with DistinctAt Least K OccurrencesFind All Pairs with a Given SumMediumLongest Subarray with Sum KLargest Subarray with 0 SumLongest Consecutive SubsequenceFind Triplets with Zero SumTriplet Sum in ArrayStream First Non-Repeating4 Sum - All QuadruplesCount Distinct Elements in Every WindowArray Pair Sum Divisibility ProblemCheck if Frequencies Can be EqualSort According to an ArraySmallest Distinct WindowLongest Subarray with Sum Divisible by KOverlapping IntervalsPrint Anagrams TogetherHardLRU CacheSmallest Window Containing All Characters of Another StringAccount MergeLargest Rectangular Sub-Matrix Whose Sum is 0Minimum Operations to Convert Array A to BLFU Cache Comment More info S souravsharma098 Follow Improve Article Tags : JavaScript Web Technologies JavaScript-DSA JavaScript-Quiz Explore JavaScript BasicsIntroduction to JavaScript4 min readVariables and Datatypes in JavaScript6 min readJavaScript Operators5 min readControl Statements in JavaScript4 min readArray & StringJavaScript Arrays7 min readJavaScript Array Methods7 min readJavaScript Strings5 min readJavaScript String Methods9 min readFunction & ObjectFunctions in JavaScript5 min readJavaScript Function Expression3 min readFunction Overloading in JavaScript4 min readObjects in JavaScript4 min readJavaScript Object Constructors4 min readOOPObject Oriented Programming in JavaScript3 min readClasses and Objects in JavaScript4 min readWhat Are Access Modifiers In JavaScript ?5 min readJavaScript Constructor Method7 min readAsynchronous JavaScriptAsynchronous JavaScript2 min readJavaScript Callbacks4 min readJavaScript Promise4 min readEvent Loop in JavaScript4 min readAsync and Await in JavaScript2 min readException HandlingJavascript Error and Exceptional Handling6 min readJavaScript Errors Throw and Try to Catch2 min readHow to create custom errors in JavaScript ?2 min readJavaScript TypeError - Invalid Array.prototype.sort argument1 min readDOMHTML DOM (Document Object Model)9 min readHow to select DOM Elements in JavaScript ?3 min readJavaScript Custom Events4 min readJavaScript addEventListener() with Examples9 min readAdvanced TopicsClosure in JavaScript4 min readJavaScript Hoisting6 min readScope of Variables in JavaScript3 min readJavaScript Higher Order Functions7 min readDebugging in JavaScript4 min read Like