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Coding Topic

Design OA Questions

Practice 57+ Design coding questions from real online assessments. Filter by company, solve in the OAHelper editor, and prepare for company-wise OAs.

easy Design medium Design hard Design

QuestionCompanyDifficulty

Google OAuth SkeletonemergentMedium Resource Locking in an m-Ary TreeamazonHard In-Memory Cache with Eviction PolicieskaigenticHard

Java: Library Structure

paypal

Easy

Provide review comments in the following codecarousellMedium

Category Browse EngineamazonMedium

C++: Return RoutingamazonMedium

Banking System Level 2truecallerMedium

C++: Return Routing EngineamazonMedium

Simplified Banking System ImplementationtruecallerHard

Browser historybarclaysMedium

Question 2: MovieDB WatchlistamazonMedium

Spring Boot: Fraudulent RequestsaccentureMedium

Java: Currency Exchange TrackeraccentureEasy

Question 2: Employee Hierarchy ImplementationukgEasy

Java: The Student ClasssalesforceEasy

Java: EdgesalesforceEasy

File StructureintuitMedium

36. Password ManagerhpEasy

Stack Batch Removalimc tradingMedium

Directory Structure QueriesintuitMedium

In-Memory DatabasecrossoverEasy

Memory AllocatorvisaMedium

Java: Show BookingciscoMedium

Session-Based Authentication SystemmicrosoftMedium

Pairs With specific SumvisaMedium

Memory AllocatorvisaMedium

Cache MissestargetEasy

LRU CachemedianetMedium

Where to Place Servers?rubrikHard

Payment Intent SystemstripeMedium

Weather Monitoring System using Observer Design PatternpaypayMedium

Memory Management QueriesdatabricksMedium

Session-Based Authentication SystemmicrosoftMedium

Gallery Management SystemdevrevEasy

Cache PerformanceinnovacerMedium

Memory Allocation SystemvisaMedium

LRU CachemedianetMedium

Question 23ionMedium

Threading in a Chat Applicationcapital oneHard

Payment Intent SystemstripeMedium

Develop a security management system!money forwardMedium

Develop a system that calculates usage fees for a storage service!money forwardHard

Movie Theater ReservationmathworksEasy

AllocatorabilityMedium

Seat reservationdezervMedium

LFU CachedezervHard

Squirrel ResearchoptiverHard

Design a Class Hierarchy for a Multi-level Parking Lot SystemkickdrumMedium

Optimized Cache Hit CounterrazorpayMedium

All topics All problems Company-wise OA questions emergent OA questions amazon OA questions kaigentic OA questions paypal OA questions carousell OA questions amazon OA questions

Design OA Questions | OAHelper