Fintech

Coinbase 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
12
Easy
2
Medium
8
Hard
2
Mapped to chapter
3

Array

7 problems

Easy 1

121Best Time to Buy and Sell Stockalso at:IntuitPayPalRobinhood Also at 39 moreVisaAdobeAirtelAmazonAppleAtlassianBloombergByteDanceCiscoCitadelFlipkartGoldman SachsGoogleGrowwInstacartJioJPMorganLyftMetaMicrosoftMorgan StanleyMyntraNetflixNVIDIAOlaPhonePeRakutenSAPSnapSwiggyTargetTeslaTiger AnalyticsToastTwo SigmaUberVMwareWalmart Global TechZoho Easy—

Medium 5

281Zigzag IteratorMedium—
528Random Pick with Weightalso at:ChimePayPalRevolut Also at 10 moreAmazonGoogleLINELinkedInMetaMicrosoftNetflixRobloxSnapTwo Sigma Medium—
622Design Circular Queuealso at:IntuitAmazonApple Also at 8 moreCitadelCloudflareDatadogGoogleMicrosoftQualcommSplunkTesla MediumChapter
2043Simple Bank Systemalso at:StripeAirbnbCapital One Also at 4 moreDropboxMetaOktaPhonePe Medium—
3043Find the Length of the Longest Common Prefixalso at:VisaAmazonBloomberg Also at 4 moreCapital OneDatabricksGoogleRoblox Medium—

Hard 1

68Text Justificationalso at:PayPalRobinhoodVisa Also at 15 moreAirbnbAmazonAtlassianAutodeskBloombergCapital OneDatabricksGoogleLyftMicrosoftMongoDBNetflixRobloxSamsaraTwilio Hard—

Hash Table

4 problems

Easy 1

2325Decode the Messagealso at:Tesla Easy—

Medium 2

981Time Based Key-Value Storealso at:AirbnbAmazonApple Also at 14 moreBloombergCars24CrowdStrikeDatabricksGoogleInstacartLyftMicrosoftMongoDBNetflixOpenAIPalantirUberVMware Medium—
1166Design File Systemalso at:AirbnbAmazonAtlassian Also at 1 moreDoorDash Medium—

Hard 1

588Design In-Memory File Systemalso at:DoorDashMicrosoftSnowflake HardChapter

Misc

1 problem

Medium 1

210Course Schedule IIalso at:IntuitAmazonApple Also at 24 moreArista NetworksBloombergCars24CitadelCleartripCure.fitDatabricksDoorDashFlipkartGoogleLinkedInMetaMicrosoftMongoDBNetflixPalantirQualcommRobloxSalesforceSnapSnowflakeTeslaUberUrban Company MediumChapter