Big Tech

Amazon 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
11
Medium
34
Hard
5
Mapped to chapter
22

Array

28 problems

Easy 3

219Contains Duplicate IIalso at:GoogleMetaMicrosoft Also at 6 moreNetflixAdobeAirbnbArista NetworksBloombergPalantir Easy—
2006Count Number of Pairs With Absolute Difference KEasy—
3637Trionic Array Ialso at:GoogleMeta Easy—

Medium 20

34Find First and Last Position of Element in Sorted Arrayalso at:AppleByteDanceGoogle Also at 10 moreMetaMicrosoftAirtelAtlassianBloombergInstacartLinkedInNianticPayPalWise Medium—
49Group Anagramsalso at:AppleCiscoDell Also at 36 moreeBayGoogleMetaMicrosoftNVIDIATeslaAdobeAtlassianAutodeskBloombergCitadelDocuSignDoorDashExpediaFreshworksGoldman SachsIntuitJioJPMorganMorgan StanleyMyntraNianticOktaPayPalPhonePeSalesforceSAPSnapTargetToastTwilioVMwareWalmart Global TechWayfairYelpZoho MediumChapter
189Rotate Arrayalso at:AppleeBayGoogle Also at 6 moreMetaMicrosoftNetflixBloombergJioRazorpay MediumChapter
200Number of Islands★ also at:AMDAppleByteDance Also at 43 moreCiscoeBayGoogleIntelMetaMicrosoftQualcommTeslaAdobeAutodeskBloombergCapital OneCitadelCloudflareCREDCrowdStrikeDocuSignDoorDashDropboxFlipkartGoldman SachsIntuitLinkedInLyftMeeshoOktaOlaPayPalPhonePePinterestRedditSAPSnapSplunkSpotifyTargetToastUberUrban CompanyVMwareWalmart Global TechZohoZomato MediumChapter
435Non-overlapping Intervals★ also at:GoogleMetaBloomberg Also at 1 moreInstacart MediumChapter
523Continuous Subarray Sumalso at:ByteDanceMetaMicrosoft Also at 4 moreBloombergChimePhonePeSwiggy MediumChapter
658Find K Closest Elementsalso at:eBayGoogleMicrosoft Also at 6 moreAtlassianDiscordDoorDashFlipkartLINESamsara Medium—
713Subarray Product Less Than Kalso at:AppleGoogleMeta Also at 4 moreAirbnbBloombergWalmart Global TechWise Medium—
735Asteroid Collisionalso at:ByteDanceeBayGoogle Also at 15 moreMetaMicrosoftBloombergCitadelDoorDashDream11FlipkartJuspayLyftMeeshoMyntraNaviOpenAIPayPalPhonePe Medium—
931Minimum Falling Path Sumalso at:AppleGoogleDream11 Also at 1 moreIntuit MediumChapter
983Minimum Cost For Ticketsalso at:GoogleBloombergGroww Also at 2 moreIntuitSnap MediumChapter
990Satisfiability of Equality EquationsMediumChapter
1219Path with Maximum Goldalso at:Salesforce MediumChapter
1268Search Suggestions Systemalso at:MicrosoftAtlassianCitadel Also at 7 moreDocuSignDoorDashMeeshoPayPalRakutenSnapTwo Sigma MediumChapter
1472Design Browser Historyalso at:BloombergChimeDoorDash Also at 4 moreGoldman SachsRobloxSnapSnowflake MediumChapter
1574Shortest Subarray to be Removed to Make Array Sortedalso at:Razorpay Medium—
1679Max Number of K-Sum PairsMedium—
1975Maximum Matrix Sumalso at:GoogleMetaBloomberg Medium—
2101Detonate the Maximum Bombsalso at:Chime Medium—
3212Count Submatrices With Equal Frequency of X and YMedium—

Hard 5

37Sudoku Solver★ also at:GoogleAdobeBloomberg Also at 5 moreCitadelDoorDashIntuitSnapVMware HardChapter
315Count of Smaller Numbers After Selfalso at:GoogleMicrosoftAdobe HardChapter
827Making A Large Islandalso at:GoogleMetaMicrosoft Also at 6 moreAirbnbDoorDashLinkedInSnapSnowflakeUber HardChapter
2141Maximum Running Time of N Computersalso at:GoogleMetaCapital One Hard—
3920Maximize Fixed Points After DeletionsHard—

Hash Table

5 problems

Easy 1

141Linked List Cycle★ also at:CiscoeBayGoogle Also at 11 moreMetaMicrosoftQualcommAdobeAutodeskBloombergCars24CoinDCXGrowwSAPVMware EasyChapter

Medium 4

12Integer to Romanalso at:AMDGoogleMeta Also at 9 moreMicrosoftAdobeAtlassianBloombergCitadelDocuSignDoorDashSwiggyX (Twitter) Medium—
142Linked List Cycle II★ also at:eBayGoogleMicrosoft Also at 7 moreAdobeAirtelAutodeskBloombergCoinDCXDelhiveryPaytm MediumChapter
355Design Twitter★ also at:MicrosoftMeeshoPayPal Also at 3 moreSalesforceSwiggyX (Twitter) MediumChapter
2840Check if Strings Can be Made Equal With Operations IIalso at:GoogleMicrosoft Medium—

Math

4 problems

Easy 3

69Sqrt(x)also at:GoogleMetaMicrosoft Also at 4 moreBloombergCitadelGoldman SachsLyft Easy—
258Add Digitsalso at:GoogleMetaAdobe Also at 1 moreVisa Easy—
415Add Stringsalso at:ByteDanceGoogleMeta Also at 6 moreAdobeAirbnbBloombergJane StreetVisaWayfair Easy—

Medium 1

1680Concatenation of Consecutive Binary Numbersalso at:GoogleBloomberg Medium—

String

3 problems

Medium 3

8String to Integer (atoi)also at:eBayGoogleMeta Also at 7 moreMicrosoftQualcommAdobeBloombergDatabricksNianticVMware Medium—
131Palindrome Partitioningalso at:GoogleMetaMicrosoft Also at 2 moreAdobeVisa Medium—
394Decode Stringalso at:ByteDanceCiscoeBay Also at 11 moreGoogleMicrosoftArista NetworksBloombergIntuitOlaPhonePeRazorpayVMwareYelpZoho MediumChapter

Tree

3 problems

Easy 1

226Invert Binary Treealso at:GoogleMetaBloomberg Also at 2 moreOlaVMware Easy—

Medium 2

199Binary Tree Right Side Viewalso at:ByteDanceeBayGoogle Also at 6 moreMetaMicrosoftAdobeOlaSamsaraVMware MediumChapter
2583Kth Largest Sum in a Binary TreeMedium—

Misc

7 problems

Easy 3

844Backspace String Comparealso at:GoogleWayfair Easy—
1729Find Followers Countalso at:GoogleTesla Easy—
2667Create Hello World Functionalso at:GoogleMicrosoftBloomberg Easy—

Medium 4

143Reorder Listalso at:ByteDanceeBayGoogle Also at 7 moreMetaMicrosoftAdobeArista NetworksBloombergMorgan StanleySplunk MediumChapter
684Redundant Connection★ also at:BloombergInMobiNavi MediumChapter
1721Swapping Nodes in a Linked ListMediumChapter
3650Minimum Cost Path with Edge Reversalsalso at:Palantir Medium—