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Coding Topic

Design OA Questions

Practice 91+ 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

Cool-Down Filter for a Notification GatewaycognizantEasy Bank Account Operations With Validated Transferscapital oneMedium Stockroom Shelves After the Sales Ledger

hilabs

Easy

Reading Old Snapshots of a Branching Key-Value Storejane streetMedium

Kiosk Note Dispenser That Pays Largest Notes Firstplutus researchEasy

Replaying a Work-Stealing Task Dequed. e. shawEasy

Point-in-Time Reads Over a Version HistorygoogleEasy

Hit Rate of a Second-Chance Page CachemicrosoftMedium

Hits And Evictions In A Two-Queue Page CacheoracleMedium

Splits And Joins In A Tiered Tray RackmicrosoftHard

Longest Wait At The Tool ShedmicrosoftMedium

Coaster Jolt Wear MonitorciscoMedium

Shard Commit Low-Watermark After Every AcknowledgementsalesforceMedium

Cache Hit Rate of a Segment Caches and pMedium

Byte-Budgeted GPU Buffer Cache with Pinned BuffersappleHard

Chrono Explorer Timeline With Clamped JumpskickdrumMedium

Playlistd. e. shawEasy

Message Cooldown FilternvidiaMedium

FIFO Cache Miss CountnatwestEasy

Museum Viewing Order Under Moves Swaps And ReversalskickdrumMedium

Dinner Rush Demand Trackerbooking holdingsMedium

Cache Misses Under Least Recently Used ReplacementnatwestMedium

Seat Reservationcapital oneMedium

Least Recently Used Cache Operation Logwells fargoMedium

API Rate Limiter Denied Request CountsuberMedium

Counting Unbroken Blocks in Each Locker BankinfosysHard

Vending Machine with Stock and ChangeconfluentMedium

Text Editor With a CursorsquarepointMedium

Waiting Lanes With Demotion On GrowthsquarepointMedium

First Unique IP in a Hit StreamuberMedium

Nested Transactions Key-Value StoretescoMedium

Task Scheduler With Subtasks and Deadline UpdatestescoHard

Treasury Settlement LedgerstripeHard

City Travel History With Past and Future JumpskickdrumMedium

Book Inventory and Display Shelfmorgan stanleyMedium

Durable Store With Snapshots And RecoverycmartMedium

Segmented Durable Key-Value StorecmartMedium

Library Insurance Value TrackervisaMedium

Limit Order Matching EnginecitadelHard

Median Watch on a Growing Ingest LedgersamsungMedium

Notification Deduplication Windowgoldman sachsMedium

Smart Fridge Inventorywells fargoHard

LFU Cache Query LogbnyMedium

Sliding Window Frequency QueriesnutanixMedium

Complex Number ClassindiamartEasy

Order Book SimulationquantitativebrokersMedium

Unexpired Token CounteribmMedium

Fraud Rule EnginestripeMedium

API Incident AlertingstripeMedium

Sweetness Ledger After Tray OperationsphonepeMedium

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Design OA Questions | OAHelper