Coding Topic
Design OA Questions
Practice 96+ Design coding questions from real online assessments. Filter by company, solve in the OAHelper editor, and prepare for company-wise OAs.
QuestionCompanyDifficulty
Google OAuth SkeletonemergentMediumResource Locking in an m-Ary TreeamazonHardIn-Memory Cache with Eviction PolicieskaigenticHardJava: Library StructurepaypalEasyProvide review comments in the following codecarousellMediumCategory Browse EngineamazonMediumC++: Return RoutingamazonMediumBanking System Level 2truecallerMediumC++: Return Routing EngineamazonMediumSimplified Banking System ImplementationtruecallerHardBrowser historybarclaysMediumQuestion 2: MovieDB WatchlistamazonMediumSpring Boot: Fraudulent RequestsaccentureMediumJava: Currency Exchange TrackeraccentureEasyQuestion 2: Employee Hierarchy ImplementationukgEasyJava: The Student ClasssalesforceEasyJava: EdgesalesforceEasyFile StructureintuitMedium36. Password ManagerhpEasyStack Batch Removalimc tradingMediumDirectory Structure QueriesintuitMediumIn-Memory DatabasecrossoverEasyMemory AllocatorvisaMediumJava: Show BookingciscoMediumSession-Based Authentication SystemmicrosoftMediumPairs With specific SumvisaMediumMemory AllocatorvisaMediumCache MissestargetEasyLRU CachemedianetMediumWhere to Place Servers?rubrikHardPayment Intent SystemstripeMediumWeather Monitoring System using Observer Design PatternpaypayMediumMemory Management QueriesdatabricksMediumSession-Based Authentication SystemmicrosoftMediumGallery Management SystemdevrevEasyCache PerformanceinnovacerMediumMemory Allocation SystemvisaMediumLRU CachemedianetMediumQuestion 23ionMediumThreading in a Chat Applicationcapital oneHardPayment Intent SystemstripeMediumDevelop a security management system!money forwardMediumDevelop a system that calculates usage fees for a storage service!money forwardHardMovie Theater ReservationmathworksEasyAllocatorabilityMediumSeat reservationdezervMediumLFU CachedezervHardSquirrel ResearchoptiverHardDesign a Class Hierarchy for a Multi-level Parking Lot SystemkickdrumMediumOptimized Cache Hit CounterrazorpayMedium