Big Tech

Intel 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
22
Easy
7
Medium
14
Hard
1
Mapped to chapter
18

Array

9 problems

Easy 1

1Two Sum★ also at:AmazonAMDApple Also at 47 moreByteDanceCiscoDelleBayGoogleMetaMicrosoftNVIDIAQualcommAdobeAirbnbAtlassianAutodeskBloombergDelhiveryDoorDashDropboxEpic SystemsExpediaFlipkartFractal AnalyticsFreshworksIntuitJane StreetJioJPMorganJuspayLyftMeeshoMorgan StanleyOlaPayPalPaytmPhonePeRobloxSAPSplunkSpotifySwiggyTargetToastTwilioVisaVMwareWalmart Global TechYelpZoho EasyChapter

Medium 7

11Container With Most Water★ also at:AmazonAppleByteDance Also at 24 moreGoogleMetaMicrosoftQualcommTeslaAdobeAirtelAtlassianBloombergCitadelDream11FlipkartFreshworksGoldman SachsGrowwLyftMyntraOktaOYOPayPalPaytmRazorpaySAPVMware MediumChapter
48Rotate Image★ also at:AmazonAppleCisco Also at 17 moreGoogleMetaMicrosoftNetflixQualcommAdobeBloombergDiscordFlipkartJPMorganLyftPayPalRakutenRobloxSamsaraVisaZoho MediumChapter
53Maximum Subarrayalso at:AmazonAppleByteDance Also at 29 moreCiscoDelleBayGoogleMetaMicrosoftTeslaAdobeAirbnbArista NetworksAtlassianAutodeskBloombergFractal AnalyticsFreshworksGoldman SachsJioLinkedInMeeshoOlaPayPalPhonePeSAPSnapSwiggyTargetVisaZomatoZoom MediumChapter
200Number of Islands★ also at:AmazonAMDApple Also at 43 moreByteDanceCiscoeBayGoogleMetaMicrosoftQualcommTeslaAdobeAutodeskBloombergCapital OneCitadelCloudflareCREDCrowdStrikeDocuSignDoorDashDropboxFlipkartGoldman SachsIntuitLinkedInLyftMeeshoOktaOlaPayPalPhonePePinterestRedditSAPSnapSplunkSpotifyTargetToastUberUrban CompanyVMwareWalmart Global TechZohoZomato MediumChapter
204Count Primesalso at:AmazoneBayGoogle Also at 6 moreMicrosoftNVIDIAAdobeEpic SystemsSAPUber MediumChapter
229Majority Element IIalso at:AmazonGoogleMeta Also at 3 moreMicrosoftAdobeAtlassian Medium—
238Product of Array Except Selfalso at:AmazonAppleByteDance Also at 22 moreeBayGoogleMetaMicrosoftAdobeAutodeskBloombergChimeDiscordFlipkartFractal AnalyticsFreshworksIntuitLyftOktaPayPalPaytmSAPSnapSplunkVMwareZoho MediumChapter

Hard 1

42Trapping Rain Wateralso at:AmazonByteDanceeBay Also at 34 moreGoogleMetaMicrosoftNVIDIAQualcommTeslaAdobeAirbnbAtlassianBloombergCitadelCrowdStrikeDocuSignFlipkartGoldman SachsGrowwInMobiIntuitLyftMyntraNaviOpenAIPayPalPaytmPhonePeRakutenRobloxSAPSnowflakeSwiggyUrban CompanyWalmart Global TechX (Twitter)Zoho HardChapter

Hash Table

4 problems

Medium 4

3Longest Substring Without Repeating Charactersalso at:AmazonAMDApple Also at 45 moreByteDanceCiscoDelleBayGoogleMetaMicrosoftNetflixNVIDIAQualcommTeslaAdobeAirtelArista NetworksAtlassianBloombergDocuSignDream11DuolingoFlipkartFractal AnalyticsFreshworksIntuitJPMorganJuspayLinkedInMorgan StanleyMyntraPayPalPaytmRakutenRipplingRobloxSalesforceSAPSpotifySwiggyToastUrban CompanyVisaVMwareYelpZohoZomatoZoom MediumChapter
138Copy List with Random Pointeralso at:AmazoneBayGoogle Also at 8 moreMetaMicrosoftAdobeArista NetworksBloombergDocuSignMorgan StanleyOYO MediumChapter
146LRU Cache★ also at:AmazonAMDApple Also at 59 moreByteDanceCiscoeBayGoogleMetaMicrosoftNetflixNVIDIAQualcommTeslaAdobeArista NetworksAutodeskBloombergCitadelCloudflareCREDDelhiveryDocuSignDoorDashExpediaFlipkartGrowwIntuitJane StreetJPMorganLINELinkedInLyftMongoDBMorgan StanleyMyntraNianticNykaaOktaOlaPalantirPayPalPhonePeRakutenRazorpayRedditRipplingSalesforceSAPSnapSnowflakeSplunkSpotifySwiggyTargetToastTwilioUberVisaVMwareX (Twitter)ZoomZscaler MediumChapter
2526Find Consecutive Integers from a Data StreamMedium—

Misc

9 problems

Easy 6

9Palindrome Numberalso at:AmazonAMDGoogle Also at 7 moreMetaMicrosoftQualcommAdobeBloombergMorgan StanleySAP EasyChapter
20Valid Parentheses★ also at:AmazonCiscoDell Also at 36 moreeBayGoogleMetaMicrosoftNetflixNVIDIAQualcommTeslaAdobeAirbnbAutodeskBloombergCoinDCXCrowdStrikeEpic SystemsFlipkartFreshworksGrowwIntuitJane StreetJioLinkedInLyftPayPalPaytmPhonePeRobloxSAPSplunkSpotifySwiggyTargetToastTwilioVMwareX (Twitter) EasyChapter
125Valid Palindrome★ also at:AmazonAppleCisco Also at 10 moreeBayGoogleMetaMicrosoftAdobeArista NetworksBloombergSAPToastWayfair EasyChapter
234Palindrome Linked Listalso at:AmazonAMDGoogle Also at 9 moreMetaMicrosoftNVIDIAAdobeBloombergIntuitMorgan StanleySAPVMware EasyChapter
509Fibonacci Number★ also at:AmazonGoogleMeta Also at 2 moreMicrosoftBloomberg EasyChapter
1614Maximum Nesting Depth of the Parenthesesalso at:MetaBloomberg Easy—

Medium 3

151Reverse Words in a Stringalso at:AmazonAppleCisco Also at 11 moreGoogleMetaMicrosoftBloombergChimeDeliverooNykaaPaytmSnapVMwareYelp Medium—
155Min Stack★ also at:AmazonAppleeBay Also at 13 moreGoogleMetaMicrosoftNVIDIAAdobeBloombergChimeDiscordFlipkartIntuitLyftPaytmSnap MediumChapter
236Lowest Common Ancestor of a Binary Tree★ also at:AmazonByteDanceCisco Also at 12 moreeBayGoogleMetaMicrosoftAdobeAtlassianBloombergFreshworksIntuitMongoDBSAPSplunk MediumChapter