Enterprise SaaS

Dropbox 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
25
Easy
2
Medium
13
Hard
10
Mapped to chapter
11

Array

18 problems

Easy 1

1Two Sum★ also at:AdobeAtlassianAutodesk Also at 47 moreEpic SystemsSAPSplunkTwilioVMwareAirbnbAmazonAMDAppleBloombergByteDanceCiscoDelhiveryDellDoorDasheBayExpediaFlipkartFractal AnalyticsFreshworksGoogleIntelIntuitJane StreetJioJPMorganJuspayLyftMeeshoMetaMicrosoftMorgan StanleyNVIDIAOlaPayPalPaytmPhonePeQualcommRobloxSpotifySwiggyTargetToastVisaWalmart Global TechYelpZoho EasyChapter

Medium 8

56Merge Intervalsalso at:AdobeAtlassianAutodesk Also at 46 moreCrowdStrikeDatabricksDocuSignOktaPalantirRipplingSAPVMwareAirtelAmazonAMDAppleBloombergByteDanceCars24CiscoCitadelDoorDasheBayExpediaFlipkartGoldman SachsGoogleInstacartJuspayMetaMicrosoftMorgan StanleyNetflixOYOPayPalPhonePeQualcommRazorpayRobloxSnapTargetTeslaToastUberVisaWalmart Global TechX (Twitter)YelpZohoZomato MediumChapter
200Number of Islands★ also at:AdobeAutodeskCloudflare Also at 43 moreCrowdStrikeDocuSignLinkedInOktaSAPSplunkVMwareAmazonAMDAppleBloombergByteDanceCapital OneCiscoCitadelCREDDoorDasheBayFlipkartGoldman SachsGoogleIntelIntuitLyftMeeshoMetaMicrosoftOlaPayPalPhonePePinterestQualcommRedditSnapSpotifyTargetTeslaToastUberUrban CompanyWalmart Global TechZohoZomato MediumChapter
289Game of Lifealso at:MetaRedditSnap Also at 1 moreTwo Sigma Medium—
347Top K Frequent Elementsalso at:Arista NetworksAtlassianDocuSign Also at 27 moreRipplingSnowflakeVMwareAmazonAMDAppleBloombergByteDanceeBayGoldman SachsGoogleInfo Edge (Naukri)IntuitMetaMicrosoftNetflixNVIDIAPayPalRobinhoodSnapSpotifyTargetTeslaTiger AnalyticsToastUberYelp MediumChapter
362Design Hit Counter★ also at:AtlassianCloudflareDatabricks Also at 9 moreAppleBloombergDeliverooGoogleMetaOpenAIRedditRobloxUber MediumChapter
609Find Duplicate File in Systemalso at:VMware Medium—
695Max Area of Islandalso at:AdobeSnowflakeAmazon Also at 8 moreByteDanceDoorDashExpediaGoldman SachsGoogleIntuitMetaTesla MediumChapter
2043Simple Bank Systemalso at:OktaAirbnbCapital One Also at 4 moreCoinbaseMetaPhonePeStripe Medium—

Hard 9

4Median of Two Sorted Arraysalso at:AdobeAutodeskOkta Also at 18 moreRipplingVMwareAmazonAppleBloombergByteDanceCitadeleBayFlipkartGoldman SachsGoogleIntuitMetaMicrosoftPayPalQualcommSnapSwiggy HardChapter
140Word Break IIalso at:MongoDBAmazonBloomberg Also at 5 moreeBayGoogleMicrosoftSnapX (Twitter) HardChapter
305Number of Islands IIalso at:DeliverooGooglePhonePe Also at 2 moreSnapUber HardChapter
843Guess the Wordalso at:GoogleMeta Hard—
924Minimize Malware Spreadalso at:DoorDash Hard—
928Minimize Malware Spread IIHard—
1001Grid IlluminationHard—
1178Number of Valid Words for Each Puzzle★ HardChapter
1250Check If It Is a Good ArrayHard—

Hash Table

3 problems

Easy 1

290Word Patternalso at:Amazon Easy—

Medium 2

17Letter Combinations of a Phone Number★ also at:Epic SystemsLinkedInTwilio Also at 15 moreVMwareAmazonAppleBloombergChimeCiscoCitadelDeliverooeBayGoogleLyftMetaMicrosoftPhonePeTesla MediumChapter
291Word Pattern IIalso at:Rakuten Medium—

Misc

4 problems

Medium 3

1236Web Crawleralso at:SnowflakeAmazon Medium—
1242Web Crawler Multithreadedalso at:DatabricksMongoDBSnowflake Also at 1 moreOpenAI Medium—
1845Seat Reservation ManagerMedium—

Hard 1

2296Design a Text Editoralso at:RipplingBlockGoogle Also at 2 moreJane StreetSnap Hard—