All TopicsAlgorithmsBackend
DesignConcurrencyDatabaseDatabase
DesignJavaJavascriptObject Oriented
DesignProgramming
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Single Number 1 - All elements except one occur twiceEasyadobe airbnb amazon apple atlassian bloomberg facebook google microsoft oracle palantir-technologies tencent
Reverse StringEasyadobe amazon apple bloomberg cisco ebay facebook godaddy goldman-sachs google microsoft oracle paypal servicenow snapchat uber
Remove duplicates from Sorted List 1Easyadobe amazon apple bytedance ebay facebook google microsoft salesforce
2Sum 2 – Input array is sortedMediumamazon apple bloomberg bytedance expedia facebook goldman-sachs google microsoft paypal pure-storage
Best Time To Buy And Sell Stock 1 - only one transactionEasyadobe akuna-capital alibaba amazon apple atlassian audible blackrock bloomberg bytedance cisco citadel deutsche-bank doordash expedia facebook goldman-sachs google grab groupon intel jpmorgan linkedin lyft microsoft morgan-stanley oracle paypal redfin sap snapchat tableau tencent uber visa vmware yahoo zillow
Merge Two Sorted ArraysEasyadobe amazon apple baidu bloomberg bytedance cisco ebay expedia facebook goldman-sachs google ibm indeed linkedin lyft microsoft netflix oracle quip tableau uber vmware yahoo yandex
Move Zeroes at the end of arrayEasyadobe amazon apple bloomberg cohesity dell ebay facebook goldman-sachs google lyft microsoft nutanix oracle paypal qualcomm sap tesla uber yahoo yandex zillow
Squares of a Sorted arrayEasyadobe amazon apple bloomberg bytedance ebay electronic-arts facebook google jane-street microsoft nutanix oracle paypal splunk twitch uber vmware
Two Sum Less Than KEasyamazon google
Valid PalindromeEasyadobe amazon apple bloomberg cisco ebay facebook google linkedin microsoft oracle spotify uber wayfair wish yandex zenefits
Detect CapitalEasygoogle
Remove duplicates from Sorted Array 1Easyadobe amazon apple bloomberg cisco cohesity ebay facebook google hulu microsoft oracle servicenow uber vmware
Remove ElementEasyamazon bloomberg google microsoft
Reverse Linked ListEasyadobe alibaba amazon apple bloomberg bytedance cisco citrix docusign ebay electronic-arts facebook factset goldman-sachs google intel mathworks microsoft nvidia oracle paypal qualcomm snapchat spotify tencent tripadvisor twitter uber visa vmware yahoo yandex yelp zenefits
Permutations of Array 1Mediumadobe amazon apple atlassian bloomberg bytedance cisco ebay facebook garena godaddy goldman-sachs google linkedin microsoft netease oracle paypal salesforce sap uber vmware yahoo
Word Pattern 1Easyamazon capital-one dropbox facebook google microsoft uber
Integer To RomanMediumadobe amazon apple blackrock bloomberg evernote facebook google linkedin microsoft opendoor oracle paypal salesforce twitter yahoo
Roman To IntegerEasyadobe amazon apple bloomberg facebook goldman-sachs google linkedin microsoft oracle qualtrics uber yahoo zillow
String CompressionMediumakuna-capital amazon apple bloomberg ebay expedia facebook godaddy goldman-sachs google lyft microsoft redfin snapchat spotify wayfair yandex yelp zillow
Number of Dice Rolls With Target SumMediumamazon bloomberg google microsoft spotify
Remove Nth Node From End of ListMediumadobe amazon apple bloomberg bytedance cisco facebook goldman-sachs google microsoft oracle vmware yandex
Valid AnagramEasyamazon apple bloomberg cisco docusign expedia facebook goldman-sachs google microsoft morgan-stanley oracle paypal servicenow snapchat uber yahoo yelp zulily
Letter Combinations of a Phone NumberMediumamazon apple atlassian bloomberg cisco dropbox ebay facebook goldman-sachs google jpmorgan lyft microsoft morgan-stanley nutanix oracle quip roblox salesforce servicenow square twilio uber vmware yahoo yelp
4SumMediumadobe amazon apple bloomberg facebook google microsoft samsung yahoo
Regular Expression Matching ProblemHardadobe airbnb alibaba amazon apple bloomberg bytedance coursera databricks ebay facebook flipkart google houzz lyft microsoft oracle palantir-technologies pocket-gems twitter uber zulily
Wildcard MatchingHardadobe amazon bloomberg bytedance coursera cruise-automation facebook goldman-sachs google microsoft oracle snapchat twitter two-sigma
Add Two Numbers represented as Linked List in Reversed OrderMediumadobe aetion airbnb alibaba amazon apple baidu bloomberg bytedance capital-one cisco dell docusign ebay facebook flipkart google grab huawei ibm intel lyft mathworks microsoft nvidia oracle paypal qualcomm redfin salesforce servicenow uber vmware wish yahoo yandex zoho
UTF-8 ValidationMediumamazon apple facebook google palantir-technologies
Two Sum 4 - Input is Binary Search TreeEasyamazon facebook google microsoft samsung servicenow snapchat
Binary Search Tree BST Inorder IteratorMediumalibaba amazon apple atlassian bloomberg bytedance cisco cloudera ebay facebook google linkedin microsoft oracle qualtrics redfin splunk uber
Number of Subsequences That Satisfy the Given Sum ConditionMediumfacebook google
Next Greater Element 1Easyamazon bloomberg facebook google microsoft oracle twitter
Baseball GameEasyamazon google
Guess Number Higher or LowerEasyapple google microsoft
Find All Numbers Disappeared in an ArrayEasyadobe apple bloomberg google microsoft yahoo
Find Pivot IndexEasyamazon apple bloomberg citadel coupang expedia facebook godaddy goldman-sachs google indeed microsoft radius salesforce tesla
Power of TwoEasyamazon apple google microsoft nvidia
Can Place FlowersEasyamazon cisco facebook google linkedin yahoo
Remove duplicates from Sorted List 2Mediumadobe amazon apple bloomberg google microsoft paypal salesforce
Isomorphic StringsEasyadobe amazon bloomberg facebook google linkedin microsoft oracle salesforce yahoo yelp
Kth Largest Element in a StreamEasyadobe amazon apple bloomberg ebay facebook google microsoft nutanix
Number of 1 BitsEasyadobe amazon apple box cisco facebook google microsoft qualcomm
Valid Palindrome 2Easyatlassian facebook google microsoft yahoo
Min Cost Climbing StairsEasyamazon bloomberg google yahoo
Unique Email AddressesEasyadobe amazon facebook google microsoft
Search Insert Position in sorted arrayEasyadobe amazon apple bloomberg google microsoft sap
Remove Linked List ElementsEasyadobe amazon apple bloomberg capital-one facebook google microsoft paypal pure-storage uber
Min StackMediumadobe amazon apple bloomberg ebay facebook flipkart goldman-sachs google groupon intuit linkedin lyft microsoft morgan-stanley netflix oracle pure-storage servicenow snapchat uber visa wish zenefits
Happy NumberEasyadobe airbnb amazon apple bloomberg ebay evernote facebook google jpmorgan microsoft nutanix pinterest pure-storage twitter uber
Invert Binary TreeEasyamazon apple bloomberg facebook google microsoft salesforce vmware