Big Tech

Microsoft 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
13
Medium
25
Hard
12
Mapped to chapter
23

Array

18 problems

Easy 3

88Merge Sorted Array★ also at:AmazonAMDApple Also at 15 moreByteDanceCiscoeBayGoogleMetaNetflixNVIDIAQualcommAdobeAtlassianBloombergLyftPayPalSwiggyVMware EasyChapter
119Pascal's Triangle IIalso at:GoogleAirtel Easy—
303Range Sum Query - Immutable★ also at:GoogleMetaPalantir EasyChapter

Medium 9

40Combination Sum IIalso at:eBayGoogleMeta Also at 6 moreTeslaAdobeBloombergDiscordRakutenSnap Medium—
64Minimum Path Sumalso at:AmazonGoogleMeta Also at 2 moreAdobeGoldman Sachs MediumChapter
90Subsets IIalso at:AmazonGoogleBloomberg Also at 1 moreNiantic MediumChapter
334Increasing Triplet Subsequencealso at:MetaCure.fitNavi Medium—
1423Maximum Points You Can Obtain from Cardsalso at:AmazonFlipkartPhonePe Also at 1 moreUber Medium—
1727Largest Submatrix With Rearrangementsalso at:AmazonGoogleBloomberg Medium—
1980Find Unique Binary Stringalso at:Amazon Medium—
2439Minimize Maximum of Arrayalso at:Paytm Medium—
3546Equal Sum Grid Partition Ialso at:Google Medium—

Hard 6

41First Missing Positivealso at:AmazonByteDanceeBay Also at 16 moreGoogleMetaNetflixTeslaAdobeDatabricksFlipkartFreshworksMyntraNykaaOYOPayPalPhonePeSwiggyVMwareZomato HardChapter
154Find Minimum in Rotated Sorted Array IIalso at:AmazonAdobe Hard—
239Sliding Window Maximum★ also at:AmazonByteDanceCisco Also at 20 moreGoogleMetaNVIDIAAdobeAutodeskBloombergCitadelDeliverooDoorDashExpediaJPMorganJuspayLINELyftMongoDBOYOPhonePeRobloxVMwareWayfair HardChapter
317Shortest Distance from All Buildingsalso at:ByteDanceMetaDoorDash Also at 2 moreSnapSplunk Hard—
632Smallest Range Covering Elements from K Listsalso at:DatabricksFlipkartLyft Also at 1 morePhonePe Hard—
992Subarrays with K Different Integersalso at:AmazonGoogleBloomberg Also at 4 moreMorgan StanleyRobloxSalesforceZoom Hard—

Hash Table

8 problems

Easy 2

202Happy Numberalso at:AmazonCiscoeBay Also at 9 moreGoogleMetaAdobeAirbnbBloombergPayPalSnowflakeSwiggyX (Twitter) EasyChapter
409Longest Palindromealso at:GoogleMeta Easy—

Medium 2

3Longest Substring Without Repeating Charactersalso at:AmazonAMDApple Also at 45 moreByteDanceCiscoDelleBayGoogleIntelMetaNetflixNVIDIAQualcommTeslaAdobeAirtelArista NetworksAtlassianBloombergDocuSignDream11DuolingoFlipkartFractal AnalyticsFreshworksIntuitJPMorganJuspayLinkedInMorgan StanleyMyntraPayPalPaytmRakutenRipplingRobloxSalesforceSAPSpotifySwiggyToastUrban CompanyVisaVMwareYelpZohoZomatoZoom MediumChapter
17Letter Combinations of a Phone Number★ also at:AmazonAppleCisco Also at 15 moreeBayGoogleMetaTeslaBloombergChimeCitadelDeliverooDropboxEpic SystemsLinkedInLyftPhonePeTwilioVMware MediumChapter

Hard 4

30Substring with Concatenation of All Wordsalso at:AmazonGoogleMeta Also at 2 moreAdobeBloomberg HardChapter
76Minimum Window Substringalso at:AmazonByteDanceCisco Also at 16 moreeBayGoogleMetaAdobeAirbnbBloombergDeliverooGoldman SachsInMobiLinkedInLyftMeeshoSAPSnapSwiggyVMware HardChapter
588Design In-Memory File Systemalso at:CoinbaseDoorDashSnowflake HardChapter
987Vertical Order Traversal of a Binary Treealso at:AmazonGoogleMeta Also at 6 moreAdobeBloombergDeliverooDoorDashRedditUber Hard—

String

6 problems

Easy 1

657Robot Return to Originalso at:GoogleGoldman Sachs Easy—

Medium 3

394Decode Stringalso at:AmazonByteDanceCisco Also at 11 moreeBayGoogleArista NetworksBloombergIntuitOlaPhonePeRazorpayVMwareYelpZoho MediumChapter
678Valid Parenthesis Stringalso at:AmazonGoogleMeta Also at 2 moreBloombergJPMorgan Medium—
1888Minimum Number of Flips to Make the Binary String Alternatingalso at:AmazonGoogleMeta Medium—

Hard 2

32Longest Valid Parenthesesalso at:AmazoneBayGoogle Also at 8 moreMetaAdobeBloombergFlipkartGrowwInMobiIntuitNykaa Hard—
132Palindrome Partitioning IIHardChapter

Tree

6 problems

Medium 6

98Validate Binary Search Tree★ also at:AmazonByteDanceeBay Also at 7 moreGoogleMetaAdobeBloombergCitadelOYOVMware MediumChapter
99Recover Binary Search Tree★ also at:AmazonGoogle MediumChapter
235Lowest Common Ancestor of a Binary Search Treealso at:AmazonGoogleAdobe Also at 1 moreX (Twitter) MediumChapter
437Path Sum IIIalso at:Google Medium—
545Boundary of Binary Treealso at:eBayMetaAdobe Also at 3 moreFreshworksSnowflakeUber Medium—
662Maximum Width of Binary Treealso at:AmazoneBayGoogle Also at 1 moreFlipkart Medium—

Database

3 problems

Easy 2

197Rising Temperaturealso at:AmazonCiscoGoogle Also at 4 moreAdobeBloombergFractal AnalyticsMeesho Easy—
595Big Countriesalso at:AmazonGoogleMeta Also at 2 moreAdobeBloomberg Easy—

Medium 1

180Consecutive Numbersalso at:AmazonBloombergDelhivery Also at 2 moreMeeshoTiger Analytics Medium—

Misc

9 problems

Easy 5

70Climbing Stairs★ also at:AmazonAMDGoogle Also at 12 moreMetaQualcommAdobeBloombergCitadelFractal AnalyticsIntuitJioPayPalRakutenTiger AnalyticsZoho EasyChapter
203Remove Linked List Elementsalso at:AmazonAdobeArista Networks Easy—
278First Bad Versionalso at:AmazonGoogleMeta Also at 2 moreAdobeBloomberg EasyChapter
696Count Binary Substringsalso at:AmazonDellGoogle Also at 4 moreMetaBloombergJPMorganMeesho Easy—
2620Counteralso at:AmazonGoogleCars24 Easy—

Medium 4

7Reverse Integeralso at:AmazonAppleGoogle Also at 5 moreMetaQualcommAdobeBloombergLyft MediumChapter
143Reorder Listalso at:AmazonByteDanceeBay Also at 7 moreGoogleMetaAdobeArista NetworksBloombergMorgan StanleySplunk MediumChapter
210Course Schedule IIalso at:AmazonAppleGoogle Also at 24 moreMetaNetflixQualcommTeslaArista NetworksBloombergCars24CitadelCleartripCoinbaseCure.fitDatabricksDoorDashFlipkartIntuitLinkedInMongoDBPalantirRobloxSalesforceSnapSnowflakeUberUrban Company MediumChapter
802Find Eventual Safe Statesalso at:AmazonGoogleBloomberg Also at 1 moreUber MediumChapter