Coding Topic
Design OA Questions
Practice 41+ Design coding questions from real online assessments. Filter by company, solve in the OAHelper editor, and prepare for company-wise OAs.
QuestionCompanyDifficulty
First Unique IP in a Hit StreamuberMediumNested Transactions Key-Value StoretescoMediumTask Scheduler With Subtasks and Deadline UpdatestescoHardTreasury Settlement LedgerstripeHardCity Travel History With Past and Future JumpskickdrumMediumBook Inventory and Display Shelfmorgan stanleyMediumDurable Store With Snapshots And RecoverycmartMediumSegmented Durable Key-Value StorecmartMediumLibrary Insurance Value TrackervisaMediumLimit Order Matching EnginecitadelHardMedian Watch on a Growing Ingest LedgersamsungMediumNotification Deduplication Windowgoldman sachsMediumSmart Fridge Inventorywells fargoHardLFU Cache Query LogbnyMediumSliding Window Frequency QueriesnutanixMediumComplex Number ClassindiamartEasyOrder Book SimulationquantitativebrokersMediumUnexpired Token CounteribmMediumFraud Rule EnginestripeMediumAPI Incident AlertingstripeMediumSweetness Ledger After Tray OperationsphonepeMediumBanking System Query ProcessorairbnbHardSchool Renovationcapital oneMediumBidirectional Phone DirectoryAppleMediumTask ManagerAppleMediumBuild Your Own Hash MapAppleMediumSupermarket Checkout LinesoptiverMediumRe-Serialize a Binary Tree in PreordersamsungMediumMotor Controller AutocompleteAMGENMediumSub Folder CountmeeshoMediumRequest Routing SystemstripeMediumOverheat ControlleroptiverHardJupyter Server Load BalancerstripeHardFruit Stall Step Queriesoyo_1augHardText Editor PrototypeexpediaMediumCompany Email Address GeneratoramexMediumSimplified Text EditorvisaMediumPlaylist Management SystemdeshawMediumBinary Command AutocompleteamazonEasyRunning Median of Financial TransactionsintuitMediumGenerator ContextagodaEasyTime-Versioned Key-Value StoreciscoMediumSuper StacklinkedinMediumBank Fraud Risk Transaction ReportflipkartHardMaintaining a Running Median of a Stream - 1ciscoMediumRate limiter design for the campus API gateway - 2ciscoHardRate limiter design for the campus API gateway - 1ciscoHardProduct Migration ServicewiproMediumBuild Blocks and Obstacles on a Number LineebayMediumTeam Issue TrackeramazonMedium