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Debug and Explain Fixes

Last updated: Mar 29, 2026

Quick Overview

This question evaluates a candidate's debugging and root-cause analysis skills, familiarity with unit testing and regression prevention, and ability to modify a small codebase to fix defects within the coding and algorithms domain.

  • Medium
  • Brex
  • Coding & Algorithms
  • Software Engineer

Debug and Explain Fixes

Company: Brex

Role: Software Engineer

Category: Coding & Algorithms

Difficulty: Medium

Interview Round: Technical Screen

Given a small codebase with failing unit tests, identify the root causes of the failures, fix the bugs, and explain the defects you found. Add minimal tests to prevent regressions and describe your debugging strategy and the tools you used.

Quick Answer: This question evaluates a candidate's debugging and root-cause analysis skills, familiarity with unit testing and regression prevention, and ability to modify a small codebase to fix defects within the coding and algorithms domain.

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Brex
Aug 14, 2025, 12:00 AM
Software Engineer
Technical Screen
Coding & Algorithms
9
0

Given a small codebase with failing unit tests, identify the root causes of the failures, fix the bugs, and explain the defects you found. Add minimal tests to prevent regressions and describe your debugging strategy and the tools you used.

Submit Your Answer to Earn 20XP

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