System Configuration and Debugging Questions

Assess knowledge of diagnosing and fixing configuration related failures. Topics include understanding common configuration formats and conventions such as YAML and JSON and legacy configuration files, how applications read configuration and environment variables, feature flags and runtime overrides, parsing and validation errors, common misconfiguration patterns, rollbacks and safe change practices, configuration management practices, and how to surface configuration problems via logs and metrics. Candidates should demonstrate a systematic approach to reproduce, isolate, and remediate configuration issues.