ERP Integration Architect

1. Explain an end-to-end ERP integration architecture you have worked on. 2. How would you integrate ERP Finance, Procurement, Sales, Inventory, WMS, CRM, and external applications? 3. How would you decide between REST APIs, SOAP services, middleware, events, and batch integrations? 4. Explain how you would design an integration that must process a very high transaction volume. 5. What is idempotency and why is it important in ERP integrations? 6. An external system sends the same financial transaction three times. How would you prevent duplicate postings? 7. An ERP transaction succeeds but the response never reaches the external system. How would you design recovery? 8. How would you design monitoring for hundreds of ERP interfaces? 9. How would you design reconciliation between an ERP and external systems? 10. An interface works correctly in DEV and QA but intermittently fails in Production. How would you perform root-cause analysis? 11. A critical Finance interface fails during month-end closing. What would be your immediate containment and recovery approach? 12. Inventory in ERP and WMS differs by thousands of units. How would you determine the source of truth and reconcile the data? 13. An integration failure affects Procurement, Inventory, Sales, and Finance simultaneously. How would you identify the originating failure? 14. How would you design retry processing without creating duplicate transactions? 15. How would you secure APIs that process customer, supplier, and financial information? 16. A business wants real-time synchronization between ERP, e-commerce, and WMS. What architecture would you propose and why? 17. How would you handle master-data synchronization across multiple ERP systems? 18. A company is migrating from a legacy ERP to a new ERP while integrations must remain operational. How would you plan the transition? 19. How would you validate migrated transaction data and prove that financial balances are accurate? 20. A Production deployment introduces incorrect data into multiple ERP modules. How would you contain, investigate, and recover from the incident? 21. How would you distinguish between an ERP application defect, integration defect, middleware issue, and external-system issue? 22. How would you perform cross-module impact analysis before implementing a new integration? 23. How would you design error logging so that functional teams can understand technical integration failures? 24. How would you establish governance for APIs, integrations, data ownership, security, and technical debt? 25. Design an end-to-end integration for an Order-to-Cash process involving ERP, CRM, e-commerce, WMS, payment gateway, and Finance, including failure handling and reconciliation.