During debugging, after confirming formatting and error handling, which action best helps identify the root cause?

• A. Ignore the error and proceed
• B. Asking a senior engineer for peer review of the code
• C. Change to a different language
• D. Roll back changes

Answer: (B)

Getting a second pair of eyes on debugging helps uncover the root cause. A peer reviewer brings a fresh perspective on the code’s logic, data flow, and boundary conditions, and can suggest targeted tests, additional logging, or different instrumentation to trace where things diverge from expectations. This collaborative check often reveals misinterpreted requirements, hidden dependencies, or edge cases that the original author missed. Bypassing the error, switching to a different language, or rolling back changes tends to hide the investigation or discard progress without explaining why the failure occurred.