How can the source of a failure in a program be identified?

To identify the source of a failure in a program, several approaches are usually used:

• Logging: analyzing application logs helps understand at which stage the error occurred and what data was involved at that moment.
• Debugging: running the program in debug mode with step-by-step execution allows pinpointing the exact location of the failure.
• Stack trace: when an exception occurs, the call stack indicates exactly where the error happened.
• Monitoring and alerts: monitoring systems can detect anomalies and provide information about the application's state at the time of failure.
• Unit tests and integration tests: help identify errors early in the development process.

For example, if an application crashes with an exception, examining the stack trace and logs will help determine in which method and with what parameters the failure occurred.