All TopicsAlgorithmsBackend
DesignConcurrencyDatabaseDatabase
DesignJavaJavascriptObject Oriented
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Valid PalindromeEasyadobe amazon apple bloomberg cisco ebay facebook google linkedin microsoft oracle spotify uber wayfair wish yandex zenefits
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
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
Ransom NoteEasyamazon apple microsoft spotify uber
Next Greater Element 1Easyamazon bloomberg facebook google microsoft oracle twitter
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
Path Sum 1 - Check if root to leaf path existsEasyadobe amazon apple bloomberg facebook microsoft oracle zillow uber
Power of TwoEasyamazon apple google microsoft nvidia
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
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
First Unique Character in a StringEasyadobe amazon apple bloomberg facebook goldman-sachs google huawei jpmorgan linkedin microsoft servicenow yahoo zillow zulily
Substring with Concatenation of All WordsHardadobe amazon apple bloomberg dropbox facebook google microsoft
Palindrome Linked ListEasyadobe amazon apple bloomberg cisco facebook google grab intel ixl microsoft nutanix snapchat vmware
Integer to English WordsHardamazon apple barclays bloomberg capital-one citrix facebook google jpmorgan linkedin microsoft nutanix oracle palantir-technologies paypal sap splunk square tableau tesla uber visa yahoo yelp zillow
Fizz BuzzEasyadobe amazon apple bloomberg capital-one cisco google linkedin microsoft oracle salesforce spotify wayfair
Snakes and LaddersMediumamazon apple cisco facebook google hulu microsoft uber
Excel Sheet Column NumberEasyamazon apple bloomberg dropbox facebook factset google microsoft uber
Count and Say SequenceMediumadobe amazon apple bloomberg epic-systems facebook google microsoft oracle
Compare Version NumbersMediumamazon apple arista-networks google microsoft square
ZigZag ConversionMediumadobe amazon apple bloomberg facebook google microsoft paypal uber wish
Bulls and CowsMediumairbnb amazon google microsoft uber zillow
Design Search Autocomplete SystemHardamazon apple bloomberg dropbox facebook google lyft microsoft salesforce snapchat uber
Expression Add OperatorsHardapple bytedance facebook google microsoft snapchat uber