Top 3 Degraded mode Interview Questions
Browse 3 real-world technical and behavioral interview questions about Degraded mode. Review scenarios, edge cases, and architectural best practices.
The MES is unreachable for four hours and the line keeps producing. What happens to the production record, and how do you reconcile afterwards?
The line survives on cached work orders and locally queued events, so the difficulty is the merge, not the outage. Reconciliation has to be idempotent, ordered by source timestamp rather than arrival, and honest about units that passed a gate nobody could evaluate. It also connects degraded mode to the point an interviewer is testing.
The line has been stopped for twenty minutes and everyone in the room believes it is your system. How do you run the next hour?
Your first deliverable is a fast, evidenced answer to whether you are in the path, measured at the station rather than on your own dashboards. Restoring production outranks diagnosis, so take a cheap evidence snapshot and then get yourself out of the path.
The line is running fine but the plant cannot ship, because a business system is down. How would you have found that dependency before it bit you?
Plants accumulate business-system dependencies nobody deliberately chose: a label printed from ERP, a recipe fetched over a link, an authentication call, a licence check. You find them by asking of each system what stops if it disappears, then give every answer a written degraded mode and rehearse it.