C# Coding Challenges (Debugging & Problem-Solving)

Online assessment to evaluate advanced C# debugging and algorithmic problem-solving skills

This advanced-level assessment is designed to test a developer’s ability to debug, optimize, and write efficient C# code in complex scenarios. It focuses on identifying runtime errors, handling exceptions, analyzing logic flaws, and applying best practices for code reliability and maintainability. Candidates work through real-world debugging tasks, algorithmic challenges, and refactoring exercises that assess critical thinking and code quality. Ideal for senior developers and experienced .NET engineers, this assessment helps employers identify professionals capable of diagnosing complex issues and delivering robust, high-performance C# solutions.

Sample Question

The code below throws a NullReferenceException when run. Identify the bug and fix it. List<string> names; names.Add("Alice"); Console.WriteLine(names.Count);