Your question is NPI Test Systems: Key Knowledge. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Describe how you would create test systems for different NPI stages and what the key things are to know when testing NPI systems.
Focus on how you would structure test data, isolate environments, and validate data correctness across stage boundaries. Call out the differences between unit, integration, staging, and production-like NPI tests, plus the signals you would monitor to catch regressions early.