Decagon Software Engineer Interview Questions
The questions to prepare for a Decagon Software Engineer interview. Questions from real interview reports rank first. Updated weekly.
Find the first non-repeating character in a string using frequency counting and a second pass in O(n) time.
DecagonUse Kadane's algorithm to find the contiguous subarray with the largest sum in linear time.
DecagonReverse a string using a two-pointer approach by converting it to a mutable character list in Python.
DecagonTests knowledge of standard linked list cycle detection algorithms and correctness reasoning.
DecagonTests data structure implementation and your understanding of amortized time complexity.
DecagonTests how clearly you communicate hands-on Python and SQL experience through a concrete example with ownership and measurable impact.
DecagonTests system design tradeoffs for persistence, latency, and scalability.
DecagonTests understanding of database models and when to use each.
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Calculate the sum of integers from 1 to 1,000,000 using PostgreSQL aggregation and filtering.
Virtu FinancialCompute top 10 customers by net sales using joins and aggregations, ordering by revenue with deterministic tie-breaking.
Gain Digital
TCS
Zest AICompare expected and actual 6sense QA results using a FULL OUTER JOIN, aggregation, NULL-safe comparisons, and CASE status logic.
6sense
Apex Systems