Big Tech

eBay interview questions

Grouped by topic, sorted Easy → Medium → Hard, then by LeetCode ID. Click a problem to open it on LeetCode; the chapter column links to the handbook chapter that covers it.

Problems
50
Easy
12
Medium
29
Hard
9
Mapped to chapter
35

Array

15 problems

Easy 3

53Maximum Subarrayalso at:AmazonAppleByteDance Also at 29 moreCiscoDellGoogleIntelMetaMicrosoftTeslaAdobeAirbnbArista NetworksAtlassianAutodeskBloombergFractal AnalyticsFreshworksGoldman SachsJioLinkedInMeeshoOlaPayPalPhonePeSAPSnapSwiggyTargetVisaZomatoZoom EasyChapter
189Rotate Arrayalso at:AmazonAppleGoogle Also at 6 moreMetaMicrosoftNetflixBloombergJioRazorpay EasyChapter
283Move Zeroesalso at:AmazonAMDCisco Also at 13 moreGoogleMetaMicrosoftQualcommTeslaAdobeBloombergCrowdStrikeIntuitLyftPayPalSAPZomato EasyChapter

Medium 10

39Combination Sumalso at:AmazonGoogleMeta Also at 10 moreAirbnbBloombergChimeCitadelNianticPayPalSamsaraSnapVMwareZomato MediumChapter
54Spiral Matrixalso at:AmazonAMDApple Also at 21 moreByteDanceCiscoGoogleMetaMicrosoftNetflixAdobeAutodeskBloombergCapital OneDatabricksDelhiveryEpic SystemsFlipkartIntuitMorgan StanleyOYOPayPalPhonePeRobloxZoho MediumChapter
130Surrounded Regions★ also at:AmazonGoogleBloomberg Also at 1 moreSplunk MediumChapter
215Kth Largest Element in an Array★ also at:AmazonAppleByteDance Also at 17 moreGoogleMetaMicrosoftQualcommAdobeAutodeskBloombergDeliverooFlipkartFreshworksIntuitLinkedInMorgan StanleyPayPalSAPSpotifyVMware MediumChapter
253Meeting Rooms IIalso at:AmazonAppleCisco Also at 15 moreGoogleMetaMicrosoftNetflixAtlassianBloombergDocuSignFreshworksJPMorganLINELyftMorgan StanleySnapTwo SigmaUber MediumChapter
284Peeking Iteratoralso at:Apple Medium—
322Coin Change★ also at:AmazonByteDanceGoogle Also at 18 moreMetaMicrosoftNetflixAdobeAtlassianBloombergCleartripDatadogDeliverooFractal AnalyticsIntuitMorgan StanleyNianticPayPalPhonePePinterestSAPVMware MediumChapter
347Top K Frequent Elementsalso at:AmazonAMDApple Also at 27 moreByteDanceGoogleMetaMicrosoftNetflixNVIDIATeslaArista NetworksAtlassianBloombergDocuSignDropboxGoldman SachsInfo Edge (Naukri)IntuitPayPalRipplingRobinhoodSnapSnowflakeSpotifyTargetTiger AnalyticsToastUberVMwareYelp MediumChapter
962Maximum Width Rampalso at:AmazonGoogle Medium—
973K Closest Points to Originalso at:MetaChimeSnap Also at 2 moreSwiggyTiger Analytics MediumChapter

Hard 2

51N-Queens★ also at:AmazonByteDanceGoogle Also at 10 moreMetaMicrosoftAdobeBloombergCitadelFreshworksOlaTiger AnalyticsZohoZoom HardChapter
140Word Break IIalso at:AmazonGoogleMicrosoft Also at 5 moreBloombergDropboxMongoDBSnapX (Twitter) HardChapter

Tree

9 problems

Easy 2

572Subtree of Another Treealso at:GoogleMeta Easy—
703Kth Largest Element in a Streamalso at:GoogleAdobeAirtel Also at 2 moreArista NetworksAtlassian EasyChapter

Medium 7

129Sum Root to Leaf Numbersalso at:AmazonGoogleMeta Also at 1 moreNiantic Medium—
199Binary Tree Right Side Viewalso at:AmazonByteDanceGoogle Also at 6 moreMetaMicrosoftAdobeOlaSamsaraVMware MediumChapter
236Lowest Common Ancestor of a Binary Tree★ also at:AmazonByteDanceCisco Also at 12 moreGoogleIntelMetaMicrosoftAdobeAtlassianBloombergFreshworksIntuitMongoDBSAPSplunk MediumChapter
250Count Univalue SubtreesMediumChapter
366Find Leaves of Binary Treealso at:DiscordDuolingoFlipkart Also at 1 moreLinkedIn Medium—
545Boundary of Binary Treealso at:MetaMicrosoftAdobe Also at 3 moreFreshworksSnowflakeUber Medium—
662Maximum Width of Binary Treealso at:AmazonGoogleMicrosoft Also at 1 moreFlipkart Medium—

Hash Table

7 problems

Easy 1

160Intersection of Two Linked Listsalso at:AmazonByteDanceGoogle Also at 4 moreMetaAirbnbFreshworksTiger Analytics Easy—

Medium 4

17Letter Combinations of a Phone Number★ also at:AmazonAppleCisco Also at 15 moreGoogleMetaMicrosoftTeslaBloombergChimeCitadelDeliverooDropboxEpic SystemsLinkedInLyftPhonePeTwilioVMware MediumChapter
138Copy List with Random Pointeralso at:AmazonGoogleIntel Also at 8 moreMetaMicrosoftAdobeArista NetworksBloombergDocuSignMorgan StanleyOYO MediumChapter
146LRU Cache★ also at:AmazonAMDApple Also at 59 moreByteDanceCiscoGoogleIntelMetaMicrosoftNetflixNVIDIAQualcommTeslaAdobeArista NetworksAutodeskBloombergCitadelCloudflareCREDDelhiveryDocuSignDoorDashExpediaFlipkartGrowwIntuitJane StreetJPMorganLINELinkedInLyftMongoDBMorgan StanleyMyntraNianticNykaaOktaOlaPalantirPayPalPhonePeRakutenRazorpayRedditRipplingSalesforceSAPSnapSnowflakeSplunkSpotifySwiggyTargetToastTwilioUberVisaVMwareX (Twitter)ZoomZscaler MediumChapter
208Implement Trie (Prefix Tree)★ also at:AmazonAppleGoogle Also at 10 moreMetaMicrosoftBlockBloombergCitadelDocuSignDoorDashMongoDBRobloxX (Twitter) MediumChapter

Hard 2

76Minimum Window Substringalso at:AmazonByteDanceCisco Also at 16 moreGoogleMetaMicrosoftAdobeAirbnbBloombergDeliverooGoldman SachsInMobiLinkedInLyftMeeshoSAPSnapSwiggyVMware HardChapter
358Rearrange String k Distance Apartalso at:Zomato HardChapter

Linked List

7 problems

Easy 2

21Merge Two Sorted Lists★ also at:AmazonByteDanceGoogle Also at 24 moreMetaMicrosoftQualcommAdobeArista NetworksBloombergCars24CleartripCoinDCXDelhiveryDocuSignFlipkartFreshworksIntuitLyftMongoDBRakutenRedditRevolutRipplingSnapSwiggyVMwareZoho EasyChapter
83Remove Duplicates from Sorted Listalso at:AmazonByteDanceGoogle Also at 5 moreMetaMicrosoftAdobeBloombergRevolut Easy—

Medium 3

143Reorder Listalso at:AmazonByteDanceGoogle Also at 7 moreMetaMicrosoftAdobeArista NetworksBloombergMorgan StanleySplunk MediumChapter
328Odd Even Linked Listalso at:AmazonAppleGoogle Also at 3 moreMetaMicrosoftMeesho Medium—
445Add Two Numbers IIalso at:AmazonByteDanceGoogle Also at 2 moreMicrosoftBloomberg Medium—

Hard 2

25Reverse Nodes in k-Group★ also at:AmazonByteDanceCisco Also at 12 moreGoogleMicrosoftQualcommTeslaAdobeArista NetworksAutodeskBloombergDiscordOYOSalesforceVMware HardChapter
1206Design Skiplistalso at:X (Twitter) HardChapter

Misc

12 problems

Easy 4

28Implement strStr()★ also at:AmazonGoogleMeta Also at 5 moreMicrosoftQualcommAdobeBloombergVMware EasyChapter
176Second Highest Salaryalso at:AmazonGoogleMeta Also at 5 moreMicrosoftAdobeBloombergMeeshoPaytm Easy—
443String Compressionalso at:AmazonGoogleMeta Also at 13 moreMicrosoftCrowdStrikeGoldman SachsLyftMongoDBPalantirPaytmRakutenSalesforceSAPSnapSpotifyYelp Easy—
868Binary Gapalso at:AmazonGoogleMicrosoft Also at 1 moreX (Twitter) EasyChapter

Medium 5

5Longest Palindromic Substring★ also at:AmazonAppleCisco Also at 26 moreGoogleMetaMicrosoftNVIDIATeslaAdobeArista NetworksAutodeskBloombergDoorDashDuolingoEpic SystemsFlipkartFractal AnalyticsInfo Edge (Naukri)Morgan StanleyPalantirPayPalPaytmPhonePeSAPSwiggyUberVisaVMwareWalmart Global Tech MediumChapter
207Course Schedule★ also at:AmazonAppleByteDance Also at 22 moreGoogleMetaMicrosoftCars24CitadelCloudflareCrowdStrikeDoorDashFlipkartIntuitPayPalRobloxSalesforceSnapSnowflakeSwiggyTargetToastUberWalmart Global TechYelpZomato MediumChapter
211Add and Search Word - Data structure designalso at:AmazonMicrosoftAtlassian Also at 4 moreDatadogDocuSignDoorDashSnowflake MediumChapter
341Flatten Nested List Iteratoralso at:AmazonAppleNetflix Also at 6 moreTeslaLyftOpenAISplunkVMwareX (Twitter) Medium—
547Friend Circlesalso at:AmazonGoogleMeta Also at 5 moreMicrosoftAdobeBloombergNaviTwo Sigma MediumChapter

Hard 3

297Serialize and Deserialize Binary Treealso at:AmazonGoogleMeta Also at 10 moreMicrosoftQualcommTeslaCitadelDoorDashFlipkartInMobiIntuitPayPalVMware HardChapter
428Serialize and Deserialize N-ary Treealso at:AppleGoogleMicrosoft Also at 1 moreBloomberg Hard—
968Binary Tree Camerasalso at:AmazonMicrosoft HardChapter