Walk me through an integration failure you personally debugged. What evidence led to your fix, and what did you verify?

Practice task

Start with an integration failure you personally investigated. Explain your contribution, the observed evidence, your diagnosis, the change and the checks you actually ran. Distinguish your work from the team's and state what the result does not establish.

If you lack a suitable real example, say so and use this fictional case to demonstrate your approach. An order producer replaces dispatch_date with separate requested_date and confirmed_date fields. The old adapter fails when dispatch_date is absent. Some new orders have no confirmation. The supplied business distinction is that a requested date is not a confirmed dispatch commitment.

Show the input and error you would inspect, a specific adapter change, the cases you would test and what you would verify before replaying held records. Label proposed checks as proposed, and lab results as lab results.