Marketplace & Mobility

DoorDash 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
2
Medium
31
Hard
17
Mapped to chapter
25

Array

30 problems

Medium 21

184Sumalso at:AdobeAmazonApple Also at 6 moreBloombergCloudflareGoogleMetaMicrosoftOYO Medium—
31Next Permutationalso at:AdobeAirtelAmazon Also at 11 moreBloombergByteDanceCure.fiteBayFlipkartGoogleIntuitMeeshoMetaMicrosoftPaytm Medium—
55Jump Game★ also at:AdobeAmazonBloomberg Also at 12 moreByteDanceCiscoGoogleMeeshoMetaMicrosoftMorgan StanleyPayPalPhonePeUrban CompanyVMwareZoho MediumChapter
56Merge Intervalsalso at:ExpediaInstacartTarget Also at 46 moreToastUberYelpAdobeAirtelAmazonAMDAppleAtlassianAutodeskBloombergByteDanceCars24CiscoCitadelCrowdStrikeDatabricksDocuSignDropboxeBayFlipkartGoldman SachsGoogleJuspayMetaMicrosoftMorgan StanleyNetflixOktaOYOPalantirPayPalPhonePeQualcommRazorpayRipplingRobloxSAPSnapTeslaVisaVMwareWalmart Global TechX (Twitter)ZohoZomato MediumChapter
209Minimum Size Subarray Sum★ also at:AmazonBloombergByteDance Also at 3 moreGoogleMetaMicrosoft MediumChapter
286Walls and Gatesalso at:SamsaraByteDanceGoogle Also at 4 moreMetaNianticRedditSpotify Medium—
304Range Sum Query 2D - Immutablealso at:LyftAmazonGoogle Also at 2 moreOktaVMware MediumChapter
380Insert Delete GetRandom O(1)also at:SamsaraUberYelp Also at 20 moreAdobeAmazonAppleBloombergCars24CiscoCitadelDocuSignGoogleIntuitLinkedInMicrosoftNetflixOktaOYORobloxSnapTwilioVMwareX (Twitter) MediumChapter
456132 Patternalso at:AmazonIntuit Medium—
54201 Matrixalso at:FlipkartGoogleMeta Also at 2 moreMicrosoftPhonePe MediumChapter
658Find K Closest Elementsalso at:SamsaraAmazonAtlassian Also at 6 moreDiscordeBayFlipkartGoogleLINEMicrosoft Medium—
695Max Area of Islandalso at:ExpediaAdobeAmazon Also at 8 moreByteDanceDropboxGoldman SachsGoogleIntuitMetaSnowflakeTesla MediumChapter
735Asteroid Collisionalso at:LyftAmazonBloomberg Also at 15 moreByteDanceCitadelDream11eBayFlipkartGoogleJuspayMeeshoMetaMicrosoftMyntraNaviOpenAIPayPalPhonePe Medium—
826Most Profit Assigning WorkMedium—
875Koko Eating Bananasalso at:SamsaraAdobeAmazon Also at 16 moreAtlassianAutodeskBloombergCitadelFlipkartGoldman SachsGoogleMetaMicrosoftNetflixNykaaOYOPayPalPhonePeSwiggyZoom MediumChapter
986Interval List Intersectionsalso at:AmazonGoogleMeta Also at 1 moreMicrosoft Medium—
994Rotting Oranges★ also at:RakutenUberAdobe Also at 23 moreAmazonBloombergChimeCitadelCleartripDream11eBayFlipkartGoogleIntuitLinkedInMetaMicrosoftMyntraOpenAIOYOPayPalPhonePeRobloxSalesforceUrban CompanyZohoZoom MediumChapter
1152Analyze User Website Visit Patternalso at:Amazon Medium—
1664Ways to Make a Fair Arrayalso at:MetaPhonePe Medium—
1834Single-Threaded CPUalso at:Google MediumChapter
2611Mice and CheeseMedium—

Hard 9

37Sudoku Solver★ also at:AdobeAmazonBloomberg Also at 5 moreCitadelGoogleIntuitSnapVMware HardChapter
84Largest Rectangle in Histogram★ also at:DeliverooAdobeAmazon Also at 11 moreBloombergCiscoFlipkartGoogleLinkedInMetaMicrosoftMyntraNaviOYORoblox HardChapter
296Best Meeting Pointalso at:LinkedInX (Twitter) Hard—
778Swim in Rising Wateralso at:GoogleMetaMicrosoft HardChapter
827Making A Large Islandalso at:AirbnbUberAmazon Also at 6 moreGoogleLinkedInMetaMicrosoftSnapSnowflake HardChapter
839Similar String GroupsHard—
924Minimize Malware Spreadalso at:Dropbox Hard—
1235Maximum Profit in Job Schedulingalso at:AirbnbAirtelAmazon Also at 13 moreBloombergByteDanceDatabricksDocuSignFlipkartGoogleMeeshoMicrosoftOYOPayPalPhonePeSnowflakeSwiggy Hard—
2065Maximum Path Quality of a Graphalso at:AtlassianSAP Hard—

Hash Table

6 problems

Easy 1

1790Check if One String Swap Can Make Strings EqualEasy—

Medium 3

146LRU Cache★ also at:ExpediaLyftRakuten Also at 59 moreTargetToastUberAdobeAmazonAMDAppleArista NetworksAutodeskBloombergByteDanceCiscoCitadelCloudflareCREDDelhiveryDocuSigneBayFlipkartGoogleGrowwIntelIntuitJane StreetJPMorganLINELinkedInMetaMicrosoftMongoDBMorgan StanleyMyntraNetflixNianticNVIDIANykaaOktaOlaPalantirPayPalPhonePeQualcommRazorpayRedditRipplingSalesforceSAPSnapSnowflakeSplunkSpotifySwiggyTeslaTwilioVisaVMwareX (Twitter)ZoomZscaler MediumChapter
208Implement Trie (Prefix Tree)★ also at:AmazonAppleBlock Also at 10 moreBloombergCitadelDocuSigneBayGoogleMetaMicrosoftMongoDBRobloxX (Twitter) MediumChapter
1347Minimum Number of Steps to Make Two Strings Anagramalso at:BloombergX (Twitter) Medium—

Hard 2

588Design In-Memory File Systemalso at:CoinbaseMicrosoftSnowflake HardChapter
854K-Similar StringsHard—

Math

5 problems

Medium 2

227Basic Calculator IIalso at:AirbnbExpediaUber Also at 9 moreAmazonAppleBloombergeBayGoogleMetaRedditSnapTesla MediumChapter
556Next Greater Element IIIalso at:AmazonMorgan StanleyVMware Medium—

Hard 3

224Basic Calculator★ also at:AdobeAmazonBloomberg Also at 5 moreCitadelGoogleMetaMicrosoftTesla HardChapter
772Basic Calculator IIIalso at:ByteDanceMicrosoftSnap Hard—
1359Count All Valid Pickup and Delivery OptionsHard—

Depth-First Search

3 problems

Medium 2

207Course Schedule★ also at:TargetToastUber Also at 22 moreYelpAmazonAppleByteDanceCars24CitadelCloudflareCrowdStrikeeBayFlipkartGoogleIntuitMetaMicrosoftPayPalRobloxSalesforceSnapSnowflakeSwiggyWalmart Global TechZomato MediumChapter
210Course Schedule IIalso at:UberAmazonApple Also at 24 moreArista NetworksBloombergCars24CitadelCleartripCoinbaseCure.fitDatabricksFlipkartGoogleIntuitLinkedInMetaMicrosoftMongoDBNetflixPalantirQualcommRobloxSalesforceSnapSnowflakeTeslaUrban Company MediumChapter

Hard 1

3123Find Edges in Shortest PathsHard—

Misc

6 problems

Easy 1

1173Immediate Food Delivery IEasy—

Medium 3

2Add Two Numbersalso at:AirbnbLyftAdobe Also at 12 moreAmazonAppleBloombergByteDanceCiscoeBayGoogleJane StreetMetaMicrosoftSAPVMware MediumChapter
5Longest Palindromic Substring★ also at:UberAdobeAmazon Also at 26 moreAppleArista NetworksAutodeskBloombergCiscoDuolingoeBayEpic SystemsFlipkartFractal AnalyticsGoogleInfo Edge (Naukri)MetaMicrosoftMorgan StanleyNVIDIAPalantirPayPalPaytmPhonePeSAPSwiggyTeslaVisaVMwareWalmart Global Tech MediumChapter
1143Longest Common Subsequence★ also at:AmazonByteDanceCisco Also at 6 moreCitadelCure.fitGoogleMetaMicrosoftMorgan Stanley MediumChapter

Hard 2

23Merge k Sorted Lists★ also at:AirbnbDeliverooLyft Also at 25 moreAdobeAmazonAppleBloombergByteDanceCiscoCitadelCloudflareDocuSigneBayFlipkartGoogleMetaMicrosoftMongoDBNianticNVIDIANykaaOlaPalantirQualcommRipplingTwo SigmaVMwareX (Twitter) HardChapter
2565Subsequence With the Minimum ScoreHard—