PrepCode

System & Class Design

130 problems

Design pattern questions across top companies

Timeframe:
Showing 130 questions
#146LRU CacheMediumhash tableNeetCodeAccentureAdobeAirwallex
#155Min StackMediumstackNeetCodeAMDAdobeAmazon
#208Implement Trie (Prefix Tree)Mediumhash tableNeetCodeAmazonAppleBloomberg
#225Implement Stack using QueuesEasystackNeetCodeAmazonAppleBloomberg
#251Flatten 2D VectorMediumarrayWalkCCCAirbnbGoogleX
#295Find Median from Data StreamHardtwo pointersNeetCodeAdobeAmazonAnduril
#297Serialize and Deserialize Binary TreeHardstringNeetCodeAmazonAppleAtlassian
#341Flatten Nested List IteratorMediumstackWalkCCCAdobeAmazonApple
#346Moving Average from Data StreamEasyarrayWalkCCCAmazonArista NetworksBloomberg
#348Design Tic-Tac-ToeMediumarrayWalkCCCAirbnbAmazonApple
#359Logger Rate LimiterEasyhash tableWalkCCCAmazonAppFolioApple
#362Design Hit CounterMediumarrayWalkCCCAffirmAmazonApple
#380Insert Delete GetRandom O(1)MediumarrayWalkCCCAffirmAmazonApple
#381Insert Delete GetRandom O(1) - Duplicates allowedHardarrayWalkCCCAffirmAmazonBloomberg
#432All O`one Data StructureHardhash tableWalkCCCAmazonAppleAtlassian
#449Serialize and Deserialize BSTMediumstringWalkCCCAmazonGoogleMicrosoft
#460LFU CacheHardhash tableNeetCodeAmazonAppleArista Networks
#588Design In-Memory File SystemHardhash tableWalkCCCAmazonBaiduCitadel
#622Design Circular QueueMediumarrayNeetCodeAmazonAppleApplied Intuition
#631Design Excel Sum FormulaHardarrayWalkCCCAirbnbAmazonGoogle
#715Range ModuleHarddesignWalkCCCAmazonCoupangGoogle
#716Max StackHardlinked listWalkCCCAmazonGoogleLinkedIn
#981Time Based Key-Value StoreMediumhash tableNeetCodeAmazonAndurilApple
#1146Snapshot ArrayMediumarrayWalkCCCAmazonAppleAurora
#1157Online Majority Element In SubarrayHardarrayWalkCCCNutanix
#1206Design SkiplistHardlinked listWalkCCCAmazonGoogleMeta
#1396Design Underground SystemMediumhash tableWalkCCCAmazonAxonBloomberg
#1429First Unique NumberMediumarrayWalkCCCAmazonGoogleMicrosoft
#1472Design Browser HistoryMediumarrayWalkCCCAmazonAppleBloomberg
#1500Design a File Sharing SystemMediumhash tableWalkCCCGoogleTwitch
Page 1 of 5