HackerEarth Software Engineer Interview Questions
The questions to prepare for a HackerEarth Software Engineer interview. Questions from real interview reports rank first. Updated daily.
Compute the GCD of two signed integers with up to 100,000 digits using string arithmetic and Euclid's algorithm.
Tests your graph algorithm knowledge and problem-solving approach.
Tests your implementation skills for digit-based logic problems.
Join streaming tables, aggregate monthly streams, and return artists ranked within each genre after listener filtering.
SpotifyExplain INNER, LEFT, RIGHT, FULL OUTER, CROSS, and SELF JOINs with examples and when to use each.
Evaluates your ability to write correct SQL for data retrieval and analysis.
Evaluates your understanding of core OOP concepts relevant to HackerEarth codebases.
Write and optimize a PostgreSQL query that summarizes current enrollment activity across studies and sites.
XPO
MedpaceOptimize daily booking aggregation across markets and calculate each market's prior-day GBV change.
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Evaluates how you approach and communicate during higher-pressure design discussions.
Assesses your ability to implement robust error handling in Node.js/Express services.