Coding Topic
Hash Table OA Questions
Practice 500+ Hash Table coding questions from real online assessments. Filter by company, solve in the OAHelper editor, and prepare for company-wise OAs.
QuestionCompanyDifficulty
Restoring Messages From a Permuted-Alphabet Cipherbnp paribasMediumCount Closest Cross-Half PairsinfosysMediumGroup Chat Mention StatisticssusquehannaMediumMagical Pairs by a Single Digit SwapsusquehannaMediumLongest Window of Unique CharactersprotonMediumFirst Unique IP in a Hit StreamuberMediumMinimum Rounds to Clear an Array by Pairs and TriplesvisaMediumFirst Letter That Occurs Exactly Oncerystad energyEasyLongest Rearrangeable Palindromic RunvisaMediumUsername Strength ReportmicrosoftMediumLongest Run of Distinct CharacterskkrMediumCount Value Pairs With a Fixed Differencemorgan stanleyMediumCharacter Frequency CounterentntEasyAnagram Windows in a TextporterMediumPlayer TrackingshlEasyNested Transactions Key-Value StoretescoMediumLongest Substring Without Repeating Charactersakuna capitalEasyAlphabetically Smallest Palindrome After Fewest ChangesgoogleMediumFaulty Street Lights After M DaysopentextMediumCount Index Pairs With Exactly k Multiples In RangechubbMediumArray Rank TransformtescoEasyCount Equal Codes Within Distance KinfosysMediumLongest Shrinkable WordgoogleMediumMaximum Total Distinct Types Over Exactly K BoxesinfosysHardBook Inventory and Display Shelfmorgan stanleyMediumLexicographically Smallest Flight Codemorgan stanleyMediumInfer the Concrete Return Type of a Generic Function SignaturecmartHardDurable Store With Snapshots And RecoverycmartMediumSegmented Durable Key-Value StorecmartMediumWords Built Out of Other WordstcsMediumReassemble Every Readable SentenceinfosysMediumTop Three New Connections for a UservisaMediumDesmus Check Center CostgyansysMediumComplex Subsequences From Range UpdatesgoogleHardSkeletons That Spell a WordvisaMediumLibrary Insurance Value TrackervisaMediumMessage Delivery WindowubsMediumTotal Operations to Make Every Subarray PalindromicgeeksforgeeksMediumCount Subarrays With a Given Zero to One RatiointuitMediumMost Visited Sectors of a Circular TrackmicrosoftMediumLongest Consistent Stretch of Event LogscitadelMediumCount Stable Server SegmentscitadelMediumLimit Order Matching EnginecitadelHardPerfect Digit SubstringsvisaMediumThe Scroll of Permitted SwapsphonepeMediumElders' Even-Divisor XOR SubarraysphonepeMediumMutual-Friend Recommendations Ranked by Shared ConnectionscitadelMediumNotification Deduplication Windowgoldman sachsMediumFriend Holding The BallvisaMediumPermutation Divisible By EightvisaMedium