Big Tech

Qualcomm 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
24
Medium
20
Hard
6
Mapped to chapter
34

Array

19 problems

Easy 6

1Two Sum★ also at:AmazonAMDApple Also at 47 moreByteDanceCiscoDelleBayGoogleIntelMetaMicrosoftNVIDIAAdobeAirbnbAtlassianAutodeskBloombergDelhiveryDoorDashDropboxEpic SystemsExpediaFlipkartFractal AnalyticsFreshworksIntuitJane StreetJioJPMorganJuspayLyftMeeshoMorgan StanleyOlaPayPalPaytmPhonePeRobloxSAPSplunkSpotifySwiggyTargetToastTwilioVisaVMwareWalmart Global TechYelpZoho EasyChapter
14Longest Common Prefixalso at:AmazonAppleeBay Also at 15 moreGoogleMetaMicrosoftAdobeBloombergFractal AnalyticsJane StreetPhonePeRevolutRobloxSAPSplunkTargetTwilioYelp EasyChapter
26Remove Duplicates from Sorted Array★ also at:AmazonAppleCisco Also at 9 moreeBayGoogleMetaMicrosoftAdobeBloombergMorgan StanleyMyntraVMware EasyChapter
88Merge Sorted Array★ also at:AmazonAMDApple Also at 15 moreByteDanceCiscoeBayGoogleMetaMicrosoftNetflixNVIDIAAdobeAtlassianBloombergLyftPayPalSwiggyVMware EasyChapter
169Majority Elementalso at:AmazonGoogleMeta Also at 7 moreMicrosoftAdobeAutodeskBloombergFreshworksJioMorgan Stanley Easy—
346Moving Average from Data Streamalso at:GoogleMetaTesla Also at 2 moreArista NetworksCitadel Easy—

Medium 11

11Container With Most Water★ also at:AmazonAppleByteDance Also at 24 moreGoogleIntelMetaMicrosoftTeslaAdobeAirtelAtlassianBloombergCitadelDream11FlipkartFreshworksGoldman SachsGrowwLyftMyntraOktaOYOPayPalPaytmRazorpaySAPVMware MediumChapter
153Sumalso at:AmazonAMDApple Also at 31 moreByteDanceCiscoeBayGoogleMetaMicrosoftNVIDIATeslaAdobeAtlassianAutodeskBloombergCitadelCloudflareDream11FlipkartGoldman SachsIntuitMeeshoMorgan StanleyMyntraPayPalPaytmPhonePeSplunkVisaVMwareWalmart Global TechZohoZomatoZoom MediumChapter
46Permutationsalso at:AmazonByteDanceCisco Also at 12 moreeBayGoogleMetaMicrosoftAdobeArista NetworksBloombergCitadelEpic SystemsGrowwVMwareZomato MediumChapter
56Merge Intervalsalso at:AmazonAMDApple Also at 46 moreByteDanceCiscoeBayGoogleMetaMicrosoftNetflixTeslaAdobeAirtelAtlassianAutodeskBloombergCars24CitadelCrowdStrikeDatabricksDocuSignDoorDashDropboxExpediaFlipkartGoldman SachsInstacartJuspayMorgan StanleyOktaOYOPalantirPayPalPhonePeRazorpayRipplingRobloxSAPSnapTargetToastUberVisaVMwareWalmart Global TechX (Twitter)YelpZohoZomato MediumChapter
200Number of Islands★ also at:AmazonAMDApple Also at 43 moreByteDanceCiscoeBayGoogleIntelMetaMicrosoftTeslaAdobeAutodeskBloombergCapital OneCitadelCloudflareCREDCrowdStrikeDocuSignDoorDashDropboxFlipkartGoldman SachsIntuitLinkedInLyftMeeshoOktaOlaPayPalPhonePePinterestRedditSAPSnapSplunkSpotifyTargetToastUberUrban CompanyVMwareWalmart Global TechZohoZomato MediumChapter
215Kth Largest Element in an Array★ also at:AmazonAppleByteDance Also at 17 moreeBayGoogleMetaMicrosoftAdobeAutodeskBloombergDeliverooFlipkartFreshworksIntuitLinkedInMorgan StanleyPayPalSAPSpotifyVMware MediumChapter
560Subarray Sum Equals K★ also at:AmazonAMDApple Also at 20 moreCiscoeBayGoogleMetaMicrosoftTeslaAdobeAirtelBloombergDeliverooFlipkartJPMorganNianticPayPalSnapSwiggyTwilioVisaWalmart Global TechZoho MediumChapter
622Design Circular Queuealso at:AmazonAppleGoogle Also at 8 moreMicrosoftTeslaCitadelCloudflareCoinbaseDatadogIntuitSplunk MediumChapter
852Peak Index in a Mountain Arrayalso at:AmazonGoogleBloomberg Medium—
2502Design Memory Allocatoralso at:AmazonNVIDIACapital One Also at 3 moreOpenAIRobloxTwo Sigma Medium—
2563Count the Number of Fair PairsMedium—

Hard 2

42Trapping Rain Wateralso at:AmazonByteDanceeBay Also at 34 moreGoogleIntelMetaMicrosoftNVIDIATeslaAdobeAirbnbAtlassianBloombergCitadelCrowdStrikeDocuSignFlipkartGoldman SachsGrowwInMobiIntuitLyftMyntraNaviOpenAIPayPalPaytmPhonePeRakutenRobloxSAPSnowflakeSwiggyUrban CompanyWalmart Global TechX (Twitter)Zoho HardChapter
2183Count Array Pairs Divisible by Kalso at:PayPal Hard—

Math

7 problems

Easy 4

9Palindrome Numberalso at:AmazonAMDGoogle Also at 7 moreIntelMetaMicrosoftAdobeBloombergMorgan StanleySAP EasyChapter
70Climbing Stairs★ also at:AmazonAMDGoogle Also at 12 moreMetaMicrosoftAdobeBloombergCitadelFractal AnalyticsIntuitJioPayPalRakutenTiger AnalyticsZoho EasyChapter
231Power of Twoalso at:AmazonGoogleMeta Also at 2 moreBloombergSnap Easy—
836Rectangle Overlapalso at:Adobe Easy—

Medium 2

50Pow(x, n)★ also at:AmazonCiscoeBay Also at 7 moreGoogleMetaMicrosoftAdobeBloombergCitadelVMware MediumChapter
62Unique Paths★ also at:AmazonGoogleMeta Also at 8 moreMicrosoftAdobeBloombergFlipkartGoldman SachsInMobiRazorpayVMware MediumChapter

Hard 1

1183Maximum Number of OnesHard—

Linked List

5 problems

Easy 3

21Merge Two Sorted Lists★ also at:AmazonByteDanceeBay Also at 24 moreGoogleMetaMicrosoftAdobeArista NetworksBloombergCars24CleartripCoinDCXDelhiveryDocuSignFlipkartFreshworksIntuitLyftMongoDBRakutenRedditRevolutRipplingSnapSwiggyVMwareZoho EasyChapter
206Reverse Linked List★ also at:AmazonAppleByteDance Also at 19 moreCiscoeBayGoogleMetaMicrosoftTeslaAdobeBloombergGrowwJioLINELinkedInPaytmSAPSnapSpotifyVMwareX (Twitter)Yelp EasyChapter
876Middle of the Linked Listalso at:AmazonAMDGoogle Also at 6 moreMetaMicrosoftAdobeBloombergFreshworksIntuit Easy—

Medium 1

19Remove Nth Node From End of Listalso at:AmazonAppleByteDance Also at 8 moreGoogleMetaMicrosoftAdobeInMobiLINEMorgan StanleyVMware Medium—

Hard 1

25Reverse Nodes in k-Group★ also at:AmazonByteDanceCisco Also at 12 moreeBayGoogleMicrosoftTeslaAdobeArista NetworksAutodeskBloombergDiscordOYOSalesforceVMware HardChapter

String

5 problems

Easy 1

58Length of Last Wordalso at:AmazonGoogleMeta Also at 2 moreMicrosoftBloomberg Easy—

Medium 3

22Generate Parenthesesalso at:AmazonByteDanceGoogle Also at 14 moreMetaMicrosoftNetflixAdobeAirtelBloombergFlipkartIntuitLyftMorgan StanleyMyntraSalesforceSpotifyZoho Medium—
72Edit Distance★ also at:AmazonAppleByteDance Also at 13 moreCiscoGoogleMetaMicrosoftAdobeArista NetworksBloombergFlipkartNaviSnapSwiggyVMwareZoho MediumChapter
3163String Compression IIIMedium—

Hard 1

297Serialize and Deserialize Binary Treealso at:AmazoneBayGoogle Also at 10 moreMetaMicrosoftTeslaCitadelDoorDashFlipkartInMobiIntuitPayPalVMware HardChapter

Two Pointers

4 problems

Easy 3

28Find the Index of the First Occurrence in a String★ also at:AmazoneBayGoogle Also at 5 moreMetaMicrosoftAdobeBloombergVMware EasyChapter
344Reverse Stringalso at:AmazoneBayGoogle Also at 4 moreMetaMicrosoftAdobeBloomberg EasyChapter
392Is Subsequencealso at:AmazonGoogleMicrosoft Also at 3 moreTeslaFractal AnalyticsRakuten Easy—

Hard 1

1163Last Substring in Lexicographical Orderalso at:Microsoft HardChapter

Hash Table

3 problems

Easy 1

141Linked List Cycle★ also at:AmazonCiscoeBay Also at 11 moreGoogleMetaMicrosoftAdobeAutodeskBloombergCars24CoinDCXGrowwSAPVMware EasyChapter

Medium 2

3Longest Substring Without Repeating Charactersalso at:AmazonAMDApple Also at 45 moreByteDanceCiscoDelleBayGoogleIntelMetaMicrosoftNetflixNVIDIATeslaAdobeAirtelArista NetworksAtlassianBloombergDocuSignDream11DuolingoFlipkartFractal AnalyticsFreshworksIntuitJPMorganJuspayLinkedInMorgan StanleyMyntraPayPalPaytmRakutenRipplingRobloxSalesforceSAPSpotifySwiggyToastUrban CompanyVisaVMwareYelpZohoZomatoZoom MediumChapter
146LRU Cache★ also at:AmazonAMDApple Also at 59 moreByteDanceCiscoeBayGoogleIntelMetaMicrosoftNetflixNVIDIATeslaAdobeArista NetworksAutodeskBloombergCitadelCloudflareCREDDelhiveryDocuSignDoorDashExpediaFlipkartGrowwIntuitJane StreetJPMorganLINELinkedInLyftMongoDBMorgan StanleyMyntraNianticNykaaOktaOlaPalantirPayPalPhonePeRakutenRazorpayRedditRipplingSalesforceSAPSnapSnowflakeSplunkSpotifySwiggyTargetToastTwilioUberVisaVMwareX (Twitter)ZoomZscaler MediumChapter

Misc

7 problems

Easy 6

104Maximum Depth of Binary Tree★ also at:AmazonByteDanceGoogle Also at 5 moreMetaMicrosoftAdobeArista NetworksLinkedIn EasyChapter
190Reverse Bitsalso at:AmazonGoogleAirbnb Also at 1 moreBloomberg Easy—
191Number of 1 Bits★ also at:AmazonGoogleMeta Also at 1 moreAdobe EasyChapter
225Implement Stack using Queues★ also at:AmazonGoogleMeta Also at 3 moreMicrosoftBloombergTwilio EasyChapter
232Implement Queue using Stacksalso at:AmazonAppleGoogle Also at 4 moreMicrosoftNetflixInMobiSAP EasyChapter
338Counting Bits★ also at:AmazonReddit EasyChapter

Medium 1

210Course Schedule IIalso at:AmazonAppleGoogle Also at 24 moreMetaMicrosoftNetflixTeslaArista NetworksBloombergCars24CitadelCleartripCoinbaseCure.fitDatabricksDoorDashFlipkartIntuitLinkedInMongoDBPalantirRobloxSalesforceSnapSnowflakeUberUrban Company MediumChapter