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How do you debug slowness and bugs?

BobyardSoftware Engineer · Technical Screen
MediumSoftware EngineerTechnical ScreenSoftware Engineering Fundamentals

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This question evaluates troubleshooting and incident-response competencies, including performance debugging, root-cause analysis, severity assessment, mitigation and impact reduction, stakeholder communication, and safe deployment practices for web applications.

The interviewer asked two practical engineering questions:

  1. A web application's frontend is loading very slowly. Describe how you would diagnose the issue end to end, identify the exact bottleneck such as a specific component, asset, API, or DOM element, and then improve performance.
  2. A production bug has been discovered. Explain how you would assess severity, mitigate impact, investigate root cause, communicate with stakeholders, deploy a fix safely, and prevent recurrence.