Coding Topic
Combinatorics OA Questions
Practice 142+ Combinatorics coding questions from real online assessments. Filter by company, solve in the OAHelper editor, and prepare for company-wise OAs.
QuestionCompanyDifficulty
String selectionnokiaHardMega Batch CompletiongoogleHardQuestion 1linkedinHardGood SequencesamazonHardCount Palindromic Subsequences of Length 5microsoftMediumQuestion 1 and Question 2microsoftHardQuestion Compilationuser submittedHardK-Step Bit Decryptionpurplle engineering 24mayEasyEncryptiontech mahindraHardCode Question 2amazonMediumPairsinfosysMediumDNA SequencingakamaiHardProcess SchedulingcitadelEasyColorful Constructionalgo universityHardSalesforce Pair SumssalesforceEasyCode Question 2amazonMediumKeypad DecoderbnyMediumPower of ArraybnyHardWaste of TimebnyMediumWaste of TimebnyMediumSub-rectangle Counting ProblemflipkartEasySubstring deletionjoveoMediumStudent ArrangementciscoHard1. Burst the balloonsepamEasyCount Tree PathsgameskraftHardMinimum SumadobeHardProduct Dependency TreeintuitHardProduct Dependency TreeintuitHardOne blockswiggyEasyOne blockswiggyEasyK-special numbersuidaiHardValid NetworkschrodingerMediumCount of Non-Consecutive ArrangementssiemensHardCount Triplets with Bounded DifferenceibmMediumBeautiful stringsinfosysHardFixing a Damaged Palindromic MessageibmEasyInfection SequencesamazonHardCounting Divisible by 15 NumberswalmartMediumNumber of Ways to Choose CablesibmEasyProject LaunchphilipsEasyEmployee of the YearmyntraMediumTech Club Committee FormationmyntraHardCount Digit Oneamerican expressHardValid BST PermutationsoracleMediumTricky subarraysgoogleHardGridlandagodaMediumTricky SubarraysgoogleHardSubarray XOR SumcashfreeMediumThe coin problemhilabsMediumCount Numbers with Same Set BitsmicrosoftEasy