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Updated weekly · Last refresh Oct 17

PayU Software Engineer Interview Questions

The questions to prepare for a PayU Software Engineer interview. Questions from real interview reports rank first. Updated daily.

50questions
~9htotal time
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1
CodingStart here. 25 questions · ~273 min
Linked List SumMedium
Practice

Add two reverse-order numbers digit by digit and return their sum as a new linked list.

coding challengeBasic AlgorithmsLinked ListsPayU
Kadane AlgorithmMedium
Practice

Implement Kadane's algorithm to find the maximum sum of a contiguous subarray.

Dynamic ProgrammingArraysAlgorithmsPayU
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2
SQL & Data Manipulation8 questions + 2 drills · ~107 min
Second Highest Trader SalaryEasy
Practice

Find the second highest distinct salary from a single table using basic PostgreSQL ordering and limiting.

SubqueriesRankingSortingPayU
Linux and SQL BasicsEasy

Assesses practical familiarity with Linux workflows and SQL usage.

sqllinuxPayU
Top Customers by Region VolumeMedium
Practice
Practice drill

Find the top 3 customers in each region by transaction volume using joins, aggregation, and window ranking.

Window FunctionsJoinsRankingJPMorganChaseSilicon Valley BankBanco Santander
Handle Nulls in Large JoinsMedium
Practice
Practice drill

Write a PostgreSQL join that preserves all orders and clearly classifies NULL and unmatched customer keys.

null handlinglarge datasetsJoinsPatternSwiggyQuantiphi
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3
Execution3 questions · ~33 min
Performance Improvements for APIsMedium

Evaluates ability to improve API performance using practical engineering techniques.

apiPayU
Update Host Entry for Production ServersMedium

Assesses practical scripting and safe operations for production environments.

scriptingproductionPayU
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4
System Design4 questions · ~44 min
Microservices Scalability and PerformanceHard

Assesses your ability to apply microservices principles to performance and scaling challenges.

scalabilitymicroservicesPayU
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5
Technical Fundamentals3 questions · ~33 min
Web Fundamentals OverviewEasy

Assesses foundational web knowledge relevant to building PayU services.

PayU
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6
Behavioral & Leadership7 questions · ~76 min
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The finish line: interview-readyComplete all 50 questions plus 2 hands-on drills to finish this plan.