The first question tests the way the candidate thinks when working with difficult bugs. Every candidate has their own process, but they must use a debugging tool, understand how to sift through each line of code using that tool, and then understand what must be done to fix the bug without affecting other code within a project.

The second question helps gauge how often a developer needs to debug his or her own code. Developers that need to spend a vast amount of their development time debugging may be ones who need extra help improving the code that they write.